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DSE Four Steps to Synchronising — Transcript

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0:05good morning everyone uh i'd just like
0:07to say
0:07thank you for attending today's course
0:09um
0:10my name is ash
0:12and i'd just like to start off by
0:14could we just try raising hands on
0:17uh zoom just to confirm that we can all
0:19hear me at the moment
0:22great thank you very much everyone i can
0:24see the hands are going up so that's a
0:25good sign so you can all hear my my dual
0:27tones today um so in today's course
0:30we're going to be going through the dsc
0:32four steps to synchronizing uh with me
0:35today is my colleague david o'connor uh
0:38david would you like to introduce
0:39yourself
0:42david i'll be answering your questions
0:44today um so as the course goes on
0:47please feel free to um
0:49add anything that needs clarifying um
0:51and anything that doesn't get answered
0:53um we can always uh run through some
0:55questions at the end
0:57i'll end up black open
1:03thank you for that dave yeah so the plan
1:05for today then is we're going to be
1:06doing the dse four steps to
1:07synchronizing course
1:09what i'd like people to do please feel
1:12free at any point during the course if
1:14you have any questions about what's
1:15being presented or any questions related
1:19to what's being presented please feel
1:21free to ask those via the question and
1:24answer section of the
1:27of zoom
1:28um
1:29we will not be looking at the zoom
1:31webinar chat we will only be looking at
1:33the question and answer section of zoom
1:35so please ask any questions you have via
1:37the question answer what dave will try
1:39to do is he'll try to answer those
1:40questions going forward or going through
1:42the presentation
1:44at the same time i'll be taking regular
1:46breaks throughout the presentation to
1:48either
1:49answer the questions directly
1:51or
1:52going through some of the questions that
1:53have been asked just to kind of
1:55reiterate them for everybody else
1:59we aim to have this presentation go on
2:01for around two hours depending on the
2:05level of questions
2:07it might be a little bit more it might
2:08be a little bit less but two hours is a
2:10good estimate for for how long the
2:12course is going to be
2:16okay right so um so we'll begin
2:26so the first thing i want to go over is
2:28what the actual aims and objectives are
2:30of today's training course
2:33so the first objective is we need to
2:36understand
2:37what the dse forceps synchronizing
2:40actually are
2:42and we'll be going through
2:44that as part of the presentation
2:47we then also need to understand why it's
2:49important we do these four steps what's
2:51the reason behind it
2:56we also need to understand when do we
2:58actually perform the four steps of
3:00synchronizing
3:02and finally we need to know how do we do
3:05the four steps
3:09so to start off with i'll just quickly
3:11go through a summary of what the dse
3:14four steps synchronizing actually are
3:23so the first of the four steps is what
3:25we call control basically making sure
3:28that the deepsea module has good control
3:30over the governor and avr
3:33the second step is to make sure that the
3:36deep sea module is
3:38correctly monitoring the current that
3:41the generator produces
3:43basically making sure power readings
3:45things like that are all correct
3:49the third step is to make sure that all
3:50the modules are communicating correctly
3:52on something that we call the msc link
3:56the msc link is a digital communications
3:59link between all of the controllers
4:04and finally we need to do some phase
4:06checks across the generator's switch
4:08gear to make sure that there hasn't been
4:10any strange wiring problems
4:14it's worthwhile noting that
4:17to do the four steps you will need some
4:20form of laptop or pc
4:22and the dse configuration suite to
4:25perform them
4:27the four steps to synchronizing is also
4:30used for both commissioning and fault
4:32finding as well
4:35i'll go in detail later about each of
4:38the four steps but i just first wanted
4:40to introduce what they were to you
4:43so now we know what the four steps are
4:46we need to know why is it important to
4:49do the four steps
4:52and for that we first need to go through
4:54a few
4:55things
4:56so first we need to talk about what
4:57synchronizing is and how synchronizing
5:00between generators is actually achieved
5:04synchronizing to deep sea means three
5:07things
5:08the first of which
5:10is frequency control
5:14frequency control is
5:16done by
5:18controlling the engine's governing
5:20system
5:24this could either be an ecu or an
5:27electronic governor so as you can see on
5:29the slide on the left here
5:31we have an electr an electronic governor
5:34such as a gac
5:35heinzmann etc or we could have an ecu
5:39fitted to the engine
5:42in terms of the syncroscope on the dbc
5:44module this is affecting the frequency
5:46this value here
5:50the job of the governor the governor
5:52controls the fueling to the engine to
5:54increase or decrease speed and as speed
5:57and frequency are directly related to
5:59one another changing engine speed
6:02changes frequency
6:08the next part of synchronizing is
6:10controlling the voltage
6:13the voltage is controlled by something
6:15called the avr
6:17automatic voltage regulator
6:20inside the alternator
6:23again there are many different avr's out
6:25there there are some examples on the
6:26slides for you to see but effectively
6:29it's controlling the voltage of the
6:31generator which is shown on the
6:33synchroscope
6:34here
6:36the way the avr works it changes the
6:39excitation current to the alternator
6:42which in turn changes the voltage
6:48and finally for synchronizing
6:50we need to worry about something called
6:52phase
6:55phase is the is measured in degree of
6:58difference between one supply and
7:00another so just because two supplies
7:04have the same voltage and frequency does
7:06not mean they are in sync you also need
7:09to make sure they are at the same phase
7:11effectively have both waveforms lying on
7:14top of each other
7:16now the way in which we change the phase
7:19of a generator is we slightly increase
7:22its frequency so for example the
7:25generator you're synchronizing to might
7:27be at 50 hertz and the generator that is
7:29doing the synchronizing might be at 50.1
7:32hertz
7:34so as the phase control is done by
7:36slightly changing the generator's
7:38frequency
7:40this means we must be using the governor
7:42again
7:44because we are changing
7:46frequency to affect phase so again phase
7:49control is done by using a governor such
7:51as this gac here on the left the
7:53engine's ecu in the middle and on the
7:56syncroscope the phase is shown by the
7:58dot that appears on the screen
8:07the problem is though
8:09there are many many different types of
8:11governors and avr's out there on the
8:14market and also many different types of
8:15ecu's as well
8:18so sometimes it'd be quite difficult to
8:20understand
8:21what governor or what avr is going to be
8:24suitable for synchronizing
8:27as a general rule of thumb
8:30for most
8:31governors and avr's
8:34if it has some form of
8:37input known as a remote bias input
8:39remote control input effectively an
8:43input in which you can connect a
8:45potentiometer a variable resistor to
8:49then this will allow you to do
8:51synchronizing
8:58however when we talk about electronic
9:01engines
9:02such as ones with ecu's
9:04normally these don't have an input for
9:07a variable resistor or something similar
9:10but that's not normally a problem
9:11because with most electronic engines
9:14we'll be using can bus messages to do
9:17the speed control
9:18and those can bus messages and normally
9:21in the form of something called the tsc1
9:24or dln1 message
9:27now
9:28for the sake of this presentation we're
9:30going to be assuming that in most cases
9:32we're going to be wiring into a
9:36governor's or avr's
9:39remote
9:40bias input effectively the input on the
9:43governor or avr that uses a
9:45potentiometer a variable resistor
9:49but the principles i'm going to discuss
9:51through this presentation are exactly
9:53the same if you're using
9:55the hard wired signal or a canvas signal
10:04so we'll start by looking at a very
10:06traditional governor or avr and have a
10:09look at the wiring
10:10so very typically on a governor or avr
10:14it will have three terminals on it as
10:17can be seen on the slide on the left
10:18hand side here
10:20and these three terminals is where you
10:22would normally connect a variable
10:24resistor a potentiometer
10:27some governors and some avr's may have
10:30three terminals
10:31some may only have
10:33two terminals
10:34the operating principle between
10:37the three terminal and two terminal
10:39governor or avr
10:40it's exactly the same
10:43so the way that this device works is
10:46on one terminal
10:48there is a
10:50reference voltage in this case it's 4
10:52volts
10:54on another terminal there is a higher
10:56voltage
10:58in this case eight volts
11:00and then there'll be another terminal
11:03which is where a varying voltage is
11:06applied
11:07in this case it's in
11:10the way this works
11:11depending on the position
11:14of this variable resistor
11:17it varies the voltage to the in terminal
11:22so for example
11:24if we had the potentiometer in its
11:28center position
11:31we get six volts on the in terminal
11:34if we wound that potentiometer fully
11:37clockwise we'd get eight volts
11:40and if we wound the potentiometer fully
11:43anti-clockwise we'd get four volts
11:47the reason it's four volts is because
11:49the lowest voltage here is four
11:51the reason it's eight volts is because
11:54the highest voltage here is eight
11:57and the reason it's six volts in the
11:59center is because six is halfway between
12:02eight and four
12:06the varying voltage on this in terminal
12:10then tells the governor or avr what
12:13voltage or frequency the generator
12:15should be ran at
12:18so
12:19very typically most governors will allow
12:23plus or minus three hertz adjustments
12:26and avrs will typically allow plus or
12:29minus sixteen percent adjustment
12:32these values do change from different
12:34governor manufacturers and different avr
12:36manufacturers but that's just a general
12:38rule plus or minus three hertz for
12:40governors plus or minus 16
12:42for abrs
12:45so as you can see here
12:48when i apply the center voltage
12:51my generator runs it nominal and
12:54normally this nominal value here is
12:57actually set by the voltage trim pot or
13:01the frequency trim pot
13:03located on the governor itself or the
13:05avr itself
13:08and then depending as i vary this
13:09potentiometer here it goes up three
13:12hertz or down three hertz around this
13:16nominal frequency or voltage as set on
13:19the governor or avr itself
13:24it's also worthwhile noting that i have
13:26just used some typical labeling here as
13:29plus in and minus but there's no
13:32standard for this on different governors
13:34or avrs you might find it labeled as abc
13:39t1 t2 t3
13:41xyz
13:43it could be anything but normally you'll
13:45be able to find this out by looking at
13:47the governor or avr manufacturers
13:49literature
13:50and normally the typical wiring diagram
13:52will give you some idea about that
13:59one way to know if your governor or avr
14:02is actually going to work with a deep
14:03sea module
14:04is if you were to take a dc multimeter
14:09and measure the voltage between what
14:11would be the minus and the plus terminal
14:14as long as that voltage as shown here is
14:174
14:18as long as that voltage is less than 10
14:20volts
14:21it will definitely work with the deepsea
14:23unit
14:28now anyone who's actually wired up a
14:30deepsea controller to a governor or avr
14:34before
14:35they will know that there is no external
14:38potentiometer that's there
14:41instead you wire the deepsea module
14:43directly to the governor or avr itself
14:47so how does the deepsea module work and
14:50how does that all kind of interlink
14:54well if we look at the next slide
15:00in the top left hand corner
15:03we're actually using the same governor
15:05in this example
15:07as the previous slide which happens to
15:09be a
15:10uh
15:11dyn1 governor i believe made by basler
15:16but i could be mistaken by that so
15:18apologies if that's incorrect
15:21um
15:22you can see we're still using the same
15:23terminal designations here so in and in
15:27this case plus four volts
15:29just going back
15:31a slide you can see that
15:34we have in
15:36and in this case plus four volts as the
15:39lowest potential terminal
15:43these are relating to the terminals on
15:45the governor itself which you can see
15:46from the wiring diagram here
15:49is
15:50terminal 7
15:524 volts and nine which is the
15:56effectively the in terminal or
15:59the wiper of the potentiometer
16:02again just going back to the previous
16:03slide
16:04you can see that the wiper of the
16:07potentiometer is going to the in
16:09terminal
16:14so the way the deepsea module works in
16:15terms of its wiring as you can see here
16:18on the left hand side we have no
16:20external potentiometer connected
16:22instead of the three terminals we're
16:25only connecting to two of them
16:28this is because the way the deepsea
16:30module works is it actually generates a
16:33voltage across its output
16:36and the voltage we generate
16:39then depends on what speed we want that
16:42generator to run at
16:45so in this case
16:47if we were to look at the voltage all at
16:49the terminals of this governor here
16:52it's still the same as it was in the
16:54previous slide six volts to run at 50
16:57hertz
16:58four volts to run at 47 hertz
17:01eight volts to run at 53 hertz that's
17:04still exactly the same
17:06now the way the deepsea module works
17:08however
17:09it then needs to generate a voltage
17:12which gets sent to that governor
17:15in this case
17:17for the governor to run at 50 hertz
17:21the deep sea module is only generating
17:242 volts
17:26this is because
17:28it's
17:302 volts added
17:32to the four volts of this terminal here
17:35which gives
17:37six volts
17:40and this is actually where the switch
17:42one value comes in
17:44switch one is actually
17:47how many volts or how much voltage does
17:50the deepsea module need to produce
17:53to make the generator run at its nominal
17:56frequency
17:57so in this case we have a switch one of
18:00four to run at two volts
18:03we produce two volts
18:05gets added to the four to make six to
18:07run at 50 hertz again just going back to
18:11the previous slide you can see the
18:12voltages here are still the same four
18:15six and eight as we previously discussed
18:20four six and eight the only difference
18:22is this time rather than using the
18:25potentiometer to generate the additional
18:27voltage we're using the deepsea module
18:32and then you can see
18:34if we want to increase or decrease speed
18:36the deepsea module adds or subtracts
18:40more voltage
18:42in this case we have a switch to setting
18:44of three plus or minus two volts
18:47so for the deepsea module to ask the
18:49generator to run at 53 hertz in this
18:52example
18:53what the dc module will do
18:55it will
18:56go to 4 volts
18:58which is actually switch 1 2 volts
19:02plus switch 2
19:042 volts
19:06and if we wanted it to run at
19:0947 hertz
19:10we'd actually ask the deepsea module to
19:12produce 0 volts
19:14which in this case is switch 1 again 2
19:17volts but this time minus switch 2 2
19:21volts
19:24now i know that's quite a lot of
19:26explanation i've just gone through and
19:27for some people that might make perfect
19:29sense and for other people that might be
19:31a bit too much information
19:34but
19:35this is actually
19:36not something you guys will have to
19:38necessarily worry about
19:40as you'll see as we go through the
19:42presentation and go through how we
19:43actually set up the switch one and
19:45switch to values
19:47we do not at all use a multimeter
19:50the only reason why i'm going through
19:52this little bit of explanation now is
19:54just to give you guys some
19:56additional information as to how exactly
19:58the deepsea module
20:00is controlling the governor or avr
20:03and i mainly do this just so that you
20:06guys will have a better idea of how to
20:09fault find if something goes wrong
20:13for example now you guys know that the
20:16deepsea module is actually generating a
20:18dc voltage on its output
20:21you might have a better idea how to
20:22fault find
20:24for example
20:25if you see two volts here on the deepsea
20:29module's output
20:30then in theory you should see
20:33two volts
20:35across these two terminals
20:37on the governor or avr
20:41and that can help with fault finding etc
20:48so i'll
20:50i know i've mentioned here as well about
20:52switch one and switch two
20:55switch one and switch two again we'll
20:57cover more in more detail as we go
20:58through the presentation
21:00but just to show you where those are
21:02they're not actual physical switches
21:06on the deepsea module they're actually
21:08sliders in pc software
21:12effectively the best way to think about
21:14it as i try to kind of allude earlier
21:17switch one is
21:19the
21:20center command or how much voltage does
21:23the deepsea module need to produce to
21:25make the governor or avr run at nominal
21:28frequency or voltage
21:31and switch 2 is just how much voltage
21:35does the deepsea module need to add or
21:37subtract from the switch 1 setting to
21:40make it run at minimum
21:42or maximum speed
21:45at this point i'll just go over to david
21:47just to see if we've got any questions
21:48coming in by the question and answer
21:51section david have you have we got any
21:52good questions coming in so far
21:58um
21:59how long may the wiring be between the
22:02station and the gate governor and avr
22:04and does voltage drop play a role
22:07um effectively
22:09uh you you're only governed by the
22:12amount of voltage that you require
22:14um as an example if you if you require
22:17the four
22:18volts
22:19phenomenal and eight volts to run at
22:22maximum rpm
22:24then
22:25as long as you can adjust your slider
22:28to achieve that then it shouldn't be an
22:30issue so if the deepsea module has to
22:32produce the full 10 volts
22:35to allow you to gain eight volts at the
22:38other end of the uh
22:40at the end of the wiring
22:42then
22:42it shouldn't be a problem
22:45um can i also note that um can we be
22:48adding the questions and answers in the
22:50questions and answers section please
22:51instead of in the chat because i almost
22:53missed that one
22:56thank you for that dave yeah i'll just
22:57like to add a couple of extra points to
22:59that as well because it is a very good
23:00question that's been asked and it is
23:02something that occasionally we do get
23:03asked to deep sea
23:05now
23:07what davis is completely correct yep you
23:09know you can you can adjust the switch
23:10one or switch switch two values to
23:12compensate for voltage drop across a
23:14cable however in all honesty the amount
23:17of voltage drop you would get
23:19should be very very very small
23:23the reason for that is most voltage
23:25signals carry very very small amounts of
23:28current
23:29and it's current down a cable
23:32that creates voltage drop
23:34so
23:35if you're ever wanting to kind of
23:37calculate what the maximum voltage drop
23:40you might see across a
23:42governor or avr control cable would be
23:45using deepsea module
23:47if you were to make the assumption that
23:49the maximum current you would see coming
23:52out of the deepsea module's output was
23:5420 milliamps
23:57you could then knowing the resistance of
23:59the cable
24:00that you have used
24:02work out what the voltage drop because
24:04voltage drop is just current times
24:06resistance
24:07i've told you that the maximum current
24:09would be 20 milliamps
24:11you could then measure the resistance of
24:12the cable and therefore work out what
24:15the voltage drop across that cable would
24:16be and in most cases as resistance of
24:20cable is very small
24:22and the maximum current that the deepsea
24:24module would ever produce out of its
24:25governor or avr output is 20 milliamps
24:28also very small then the voltage drop
24:31you would see across that cable should
24:33in theory be very small
24:36now obviously you could there's ways in
24:37which you can uh
24:39emit that by using large diameter cable
24:42for example because a larger diameter
24:44cable has a smaller resistance so if you
24:46are concerned about long cable runs the
24:49best way to mitigate any sort of voltage
24:51drop which should be small anyway
24:54would be to use a larger diameter cable
24:58i think though what is more important
25:00which is a point i did forget to mention
25:02on the slide if i just go back a couple
25:04of slides um you will see on the wiring
25:07here that we do advise that the cable be
25:10a shielded cable
25:12between the governor and the deep sea or
25:15the avr and the deep sea module
25:18this is just because any form of
25:20external magnetic interference
25:23even if it's for example in the
25:25millivolt range
25:27could cause disturbances with some
25:29governors and some avr's depending on
25:32how sensitive their input is
25:36it doesn't have to be anything specially
25:37rated like can bus cable or anything
25:39like that just high quality screened
25:41cable maybe even the type you use for a
25:44magnetic pickup sensor for example that
25:46that would be fine
25:52i i can also see that another question
25:53has just come in i'll read this out so
25:55everyone can see it
25:57the question is my generator does not
25:58have an ecu however the frequency is
26:0153.5 hertz and it does have an avr i
26:04guess i need to look at the avr to
26:06adjust i'm not sure if the terminals on
26:09the avr
26:10if not can you advise what to do
26:14well it seems there might be a couple of
26:15things on that question so i'll try to
26:17answer them as i can
26:19firstly
26:22frequency is down to the engine governor
26:24not the avr so if your engine is running
26:27at 53 hertz the first thing you should
26:29do
26:31whenever setting up a generator without
26:32the deepsea module connected in any way
26:34shape or form you do need to make sure
26:36that the generator runs at 50 hertz if
26:38that's your nominal frequency and then
26:41adjust the avr to whatever the nominal
26:43voltage should be
26:47so again just to make it clear frequency
26:50is
26:50controlled by the governor not the avr
26:54the avr controls voltage
26:57similarly though if your generator is
26:59not running at the correct voltage you
27:01will need to make adjustments on the avr
27:04itself
27:05to
27:06run at the correct
27:08voltage if i just go back a couple of
27:10slides um
27:11to earlier in the presentation i'll show
27:13you some of these potentiometers i'm
27:14referring to
27:16the gac governor is actually quite a
27:18good one um
27:21if we already look at this gst governor
27:23here the potentiometer terminals that
27:25the deepsea module will connect into are
27:27these ones here
27:28g h and j
27:32and
27:32under these grommets which are used for
27:35ip isolation to stop water ingress there
27:38will be some additional on circuit
27:40potentiometers which as you can see here
27:43set the nominal speed or nominal
27:45frequency of the generator so normally
27:47what you would do with the deepsea
27:49module disconnected you'll adjust the
27:51onboard potentiometers to make the
27:53governor run the generator at nominal
27:56frequency
27:57and also adjust on the avr its same
28:01potentiometer for nominal voltage
28:04i hope that answers the question
28:11okay so we'll carry on now and we'll
28:13come back to questions uh later on
28:16so as you can see
28:18it's very important for synchronizing we
28:20have good control over the governor and
28:22avr
28:24because we use the governor and avr as i
28:26said earlier for
28:28frequency voltage and phase control
28:35however once we've done synchronizing
28:37what happens next well normally the
28:39reason why we are synchronizing multiple
28:41generators together is so that we can
28:43load share with multiple generators
28:46load sharing is basically basically just
28:49making sure that
28:50multiple generators can share the load
28:54between them
28:56and the way that deepsea module does
28:58load sharing is it doesn't necessarily
29:01share the load equally between the
29:03generators
29:04because if you have different sized
29:07generators what the deepsea module will
29:09try to do is make sure that each
29:12generator is producing the same
29:14percentage of power
29:17so for example imagine you had a 100
29:20kilowatt load
29:22and you had two generators
29:25one was 200 kilowatts
29:27and one was 100 kilowatts
29:30the way this would work is the 200
29:33kilowatt generator would produce 66
29:36kilowatts
29:37and the 100 kilowatt generator would
29:40produce 33 kilowatts
29:42but the net result is that both
29:45generators would be producing 33
29:48of their size
29:51so again when load sharing what the dc
29:52module tries to do is make sure that the
29:54generators are producing the same
29:56percentage of power
29:58not necessarily the same
30:01amount of power
30:03now the way in which the deepsea module
30:05does this is we actually have two
30:08different types of power we need to
30:10control
30:11when doing load sharing
30:13the first type of power is something
30:15called active power which most people
30:17will know as kilowatts
30:20now the deepsea module measures the
30:22kilowatts the generator is producing by
30:24using voltage sensing and the current
30:26transformers which you wire into the
30:28deepsea module
30:32the dse module then knows how much
30:35kilowatts that generator has to produce
30:38due to the msc link communication
30:40between the generators
30:43and then the way the deepsea module
30:45controls how much kilowatts the
30:47generator needs to produce is by using
30:49the engine's governor
30:56so you can see that again the engine
30:58governor is coming into coming into play
31:00here
31:01so we actually use the engine governor
31:03for both frequency control phase control
31:06and also kilowatt control
31:11the same can be said for the other type
31:13of power that the deepsea module needs
31:15to share
31:17this is called reactive power
31:19mostly known as cave arse
31:22the way the deepsea module measures
31:24cavers is by using voltage sensing and
31:26current transformers just like with
31:29kilowatts
31:31it knows how much cave out the generator
31:32needs to produce
31:34because of the msc link again just like
31:37with kilowatts
31:40the only difference here is the way the
31:42deepsea module controls kvr
31:45is by
31:46varying
31:49the control to the avr
31:51if the avr varies excitation current it
31:54will actually vary the amount of cave
31:56out the generator
31:58produces so it's very important that the
32:01deepsea module has good control
32:07so just to summarize what we've gone
32:08through so far
32:10the engine governor
32:12is used by the deepsea module to control
32:14frequency and phase while synchronizing
32:17but it's also used to control kilowatts
32:20whilst in parallel with another
32:21generator
32:24we use the alternators avr for voltage
32:27control while synchronizing
32:30but we also use it for reactive power
32:32control
32:33whilst in parallel with another
32:35electrical source
32:39we use the voltage and current
32:41measurement of the deepsea module to
32:43measure how much active power kilowatts
32:46and reactive power kvr the generator is
32:48producing
32:52and we also use the msc link to instruct
32:55each generator
32:56how much power to produce in terms of
32:59kilowatts and cables
33:01so you can see there it's very important
33:03that the deepsea module has good control
33:06over the governor and avr
33:08it has very good measurement of voltage
33:11and current and also has very good
33:13communication
33:15if at any point any of these was to fail
33:18or not be set up or calibrate the car
33:21correctly
33:23you will end up having load sharing
33:25problems synchronizing problems etc
33:29so it is very very important to do this
33:33so i guess then the question becomes how
33:35do we know how to check that all of
33:37these different aspects
33:39are working
33:42that's actually where
33:45the dsc four steps to synchronizing
33:48comes into play
33:51and just to kind of go over again what
33:54those dse four steps are synchronizing
33:56actually are
33:58step one
34:00is to check the control of the governor
34:02and avr because we need to make sure
34:04we've got good governor control and good
34:06avr control
34:08to make sure that we have good
34:10synchronizing control and
34:14load sharing control in terms of
34:15kilowatts and kva's voltage and
34:17frequency
34:20next step is to check the metering to
34:21make sure that we can measure the
34:24current and power on the cts correctly
34:26because if they're incorrect
34:29all of our power measurement will be
34:30wrong and therefore load sharing will be
34:32wrong
34:34we also need to make sure communications
34:36is working correctly so make sure that
34:38msc link is working correct because the
34:40msc link is not working the modules will
34:43not be able to communicate to one
34:44another
34:47and finally we also need to do phase
34:49checks across
34:50across the switch gear to make sure
34:53nothing has gone wrong
34:55so before we go in depth into each of
34:58these four steps
35:00i'd just like to pass back to dave just
35:02to see if we've got any questions that
35:03have come in
35:07yes um we have we've had one gentleman
35:10ask what uh percentage of generate
35:13uh sorry on a second
35:16analog percentage
35:18when the generator is running
35:20we're effectively aiming for uh 75 to 85
35:23percent when setting up switch two
35:25um but ash will be covering this shortly
35:28um
35:30another gentleman's asked does the does
35:32the percentage of kvr
35:34have to be equal
35:35um when synchronizing yes the the
35:38percentage of kvar is shared equally
35:40across the sets assuming they're the
35:42same size but it's the percentage that
35:44is equal
35:49okay thank you so yeah just to kind of
35:50go over some of the things that dave's
35:51also mentioned there as well um so
35:54we'll talk a bit more about this as we
35:56as we go through the presentation as
35:58dave said and um normally when we're
36:00doing the setup of switch one switch two
36:02which is what we're actually gonna be
36:03covering next
36:05we're looking for a governor and avr
36:07drive percentage of around 75 to 85
36:10but normally in most load-sharing
36:13applications the governor and avr
36:16percentage should be less than 10
36:18i'll cover this a little bit more later
36:20on as we go through
36:24so we'll carry on the presentation
36:29so we're going to go through now
36:31step one and step one is control
36:34now each of the steps we have
36:37they actually have their own kind of
36:39mini steps within them little procedures
36:41that we need to do
36:43so in terms of the control
36:45we actually have four things we need to
36:48do
36:49setting of the switch one for the
36:50governor
36:51setting of the switch one for the avr
36:54setting of the switch 2 for the governor
36:56and setting of the switch
36:582 for the avr
37:06we need to make sure
37:08that we always do the governor first
37:11when doing the switch one and switch to
37:13setup procedure
37:14the reason we always do the governor
37:16first is
37:17generator frequency can affect voltage
37:21however generator voltage does not
37:24affect frequency
37:26so this is why in the procedure you'll
37:28see i've always started with doing
37:30switch one for the governor first i'll
37:31switch two for the governor first
37:37so we'll go through how we set switch
37:39one for the governor and avr first
37:42and then we'll go on to how we set
37:44switch two for the governor and aviar
37:46the way i've done this i've actually
37:49recorded a video which will play and i
37:51shall narrate over that video as we go
37:53through
37:54just because obviously i didn't want to
37:56do this live with a generator running in
37:58the background and unfortunately you
37:59guys not being able to hear me
38:02so we'll start first with
38:04switch one for the governor and the avr
38:14so the first thing we always advise you
38:16do
38:17when connecting to any deepsea module
38:20is read this module's configuration
38:24the reason we always strongly advise
38:25that you read the modules configuration
38:27is that if you do make any mistakes or
38:31problems whilst doing this procedure or
38:33anything with an hc module reading and
38:36saving will at least then give you the
38:38option to revert back if something has
38:41gone wrong at a later date
38:44so you can see here all i'm going to be
38:45doing first is reading the modules
38:48configuration
38:49and once done
38:51saving that
38:53and you can save the configuration by
38:54going to the top left hand corner of the
38:57software and pressing the save button
39:00where you choose to save this file what
39:02you choose to name the file in all
39:04honesty it doesn't matter we always
39:07advise reading and saving before you do
39:10anything else
39:11just so that then if something goes
39:13wrong you have a way of reverting back
39:16later on
39:18now the first thing we need to check in
39:20the configuration
39:22is to find out what the generator's
39:24nominal voltage and nominal frequency
39:27should be
39:28now we can do this by going to the
39:30generator section of the configuration
39:33and then going to generator frequency
39:35here we can see what the nominal
39:37frequency should be
39:39and here we can see what the nominal
39:41voltage should be
39:42i'll be doing all of this today in phase
39:44the neutral there's no problem doing it
39:47face to face
39:48as part of the four steps we'll also be
39:50connecting to the scada section as you
39:52can see here just click on the bar it
39:54will open
39:57and we'll be starting and stopping the
39:58generator using the mimic section of
40:01scada but there's nothing wrong with
40:03using the physical buttons on the module
40:06we'll also be looking at the switch 1
40:08and switch to settings which are found
40:11under the generator governor avr
40:13interface as you can see
40:15here
40:18so the first thing we're going to be
40:20doing is actually setting switch 1 of
40:22the governor and the way we do that you
40:25start the generator
40:27and it's very important you leave the
40:30generator breaker open
40:34as you can see here it's not been
40:35requested to close
40:37we then go to
40:39the switch one slider of the governor
40:41and we then start to adjust by default
40:43the values will be at zero
40:46and all you need to do is just keep
40:48increasing that switch one value
40:52until you attain whatever your nominal
40:54frequency is in this example 50 hertz
40:58you can see on the on the example here
41:01i've made a lot of change and nothing's
41:03happened
41:05this could be due to how the governor
41:07works
41:08could also be due to a wiring problem
41:10what we advise you do is keep going all
41:12the way to the end until you see a
41:15change
41:16like for example i've seen now
41:20it is very important to note however in
41:22this example that as i increase switch 1
41:25the frequency is going down
41:30normally as you increase switch 1 the
41:32frequency would go up
41:35now this is not necessarily a problem
41:37and i'll tell you how we combat this
41:40problem later because i want to show you
41:42what would happen if we don't fix it to
41:44start with
41:46once we've got the switch 1 of the
41:48governor correct we then start adjusting
41:50switch 1 of the avr
41:53in this example the nominal voltage is
41:55going to be 240 volts face to neutral or
41:59415 phase to phase
42:02so we adjust the switch one of the
42:03governor first to get nominal frequency
42:06then we adjust the switch one of the avr
42:08to get nominal voltage in this case
42:10you'll see as i increase switch one of
42:12the avr the voltage is actually going up
42:15so different to how the governor works
42:19so now you can see i've reached nominal
42:21voltage and nominal frequency
42:24by adjusting the switch one value
42:26and all i do now is stop the generator
42:29and that's actually how you set switch
42:32one
42:33it's very very simple all you've got to
42:35do is start the generator
42:37leave the breaker open
42:39and then adjust the switch one value for
42:41the governor first until you get to 50
42:44hertz or whatever your nominal frequency
42:46is and then adjust switch one of the avr
42:49until you get to nominal voltage
42:51whatever that nominal voltage may be
42:55again
42:56paying very close attention
42:59if you increase switch one and the
43:02frequency or voltage goes down
43:05pay attention to that
43:07i'll show you in the next video what
43:09happens if we
43:11don't fix that problem and then also
43:13what to do if you do see that
43:20so i'll just go back to dave quickly
43:22dave do we have any questions so far
43:25on the switch one setup we've had a few
43:28people requesting for the videos and the
43:31slideshows
43:32whoever would like those if you'd
43:35send me an email into support we should
43:38be able to provide them from there
43:46okay we'll carry on then and start
43:48looking at how we do the switch 2 for
43:50the governor instead
43:55so the switch to setup procedure is
43:56slightly different
43:59so what we're going to do this time
44:00before we even start the generator
44:04we're going to go into the modules
44:06configuration
44:09and we're going to change the nominal
44:11frequency now we're going to increase it
44:13by 2.5 hertz so in my example that would
44:17be
44:1852.5
44:20and then we're going to write that to
44:21the controller
44:28what we're going to do this time is
44:30we're going to start the generator
44:32and as it runs with the breaker open it
44:36will still run at 50 hertz
44:39when we close the generator's breaker
44:42you will then see that the deepsea
44:43module will start to try to adjust
44:47to 52 hertz
44:49so we're going to start
44:51and you'll see that when i'm running
44:53with the gen set breaker open
44:56the generator is still going to be
44:57running at 50 hertz
45:00as you can see here still running at 50.
45:03not a problem
45:06then what we're going to do
45:08we're now going to close the generator
45:09breaker and what should happen we should
45:12see the
45:13frequency start to increase
45:19however in this case you can see the
45:21frequency for some reason
45:23has decreased
45:27now
45:28this has happened
45:29because
45:31as we increase switch one
45:33the frequency decreased
45:36now what a lot of people would do here
45:38is go and change the wires around on the
45:39back of the deepsea module but that's
45:41not the correct thing to do what you
45:43need to do is go to
45:45the generator synchronizing sync options
45:48and take the option output reversed as
45:50i've shown here
45:53so what's going to happen now this is
45:55the only thing we've changed is the tick
45:57box for output reversed we're going to
45:59start the generator
46:01and if we close the breaker this time
46:03you'll see that the frequency will
46:05instead of going down
46:06now go up
46:08this is what you should always do in
46:09this instance never swap the wires
46:11around on the back of the deepsea module
46:16now one thing we do get asked quite a
46:18bit is when i tick that box what
46:21actually should happen with switch one
46:24you'll see with the video even though
46:26i've ticked the box output reversed
46:28as i increase the switch one value the
46:31frequency still decreases and that is
46:35correct
46:36that out that tick box for output
46:39reversed
46:40only affects switch two it has no effect
46:44on switch one
46:47so this time you'll see as i close the
46:48generator breaker
46:50rather than the frequency decreasing
46:53the frequency has now started to
46:55increase just as we expect
46:59now we're expecting it to get to 52.5
47:01hertz but you'll see it's stuck at 51
47:04hertz
47:06this is because the switch 2 value is
47:08too small all we need to do now is keep
47:12increasing switch 2
47:14until we get to
47:1752.5 hertz
47:19with a governor analog percentage
47:21of 80 percent you'll see as you keep
47:25increasing switch to
47:27eventually the governor analog
47:28percentage will go from 100
47:31and start decreasing
47:34now in this example i've accidentally
47:37overshot the 80 percent
47:39that's not a problem to combat this
47:42issue i just decrease the switch to
47:44value
47:46so keep in mind increasing switch 2
47:49decreases the governor percentage
47:52increasing switch so decreasing switch
47:55to
47:55increases the governor percentage so i
47:58just keep increasing switch to
47:59decreasing switch to until i get 80
48:03you may not get exactly 80 that's fine
48:06as long as it's somewhere between 75 and
48:1085 percent which i've got here
48:13so all i'm going to do now
48:14open the gen set breaker
48:16and stop the generator
48:19i'm now going to do the exact same test
48:22but instead of going up 2.5 hertz
48:25i'm actually going to go down 2.5 hertz
48:29in this case that would be 47.5
48:34and i'm going to write that back into
48:36the controller
48:39so the procedure we're going to do this
48:40time is exactly the same we're going to
48:42start the generator with the breaker
48:44open it's still going to run at 50 hertz
48:47and then when i close the genset breaker
48:50rather than going up to 52.5 hertz it's
48:54going to come down to 47.5 hertz
48:57and then we should still see a governor
49:00output percentage of somewhere roughly
49:02between 75 and 85 percent
49:07so here i am starting the generator
49:10and remember you can only request the
49:12deepsea module to close the generator
49:14breaker when the led underneath the
49:18generator button turns on
49:20like so
49:22generic is now unload if we go to the
49:24governor and avr section you'll see the
49:26frequency has started to come down
49:28and eventually when it gets to 47.5
49:32hertz that governor analog percentage
49:34should be somewhere between 75 and 85
49:38percent
49:43as we can see in this example
49:45it's about 84
49:47perfectly fine
49:49so all i'll need to do now is go back to
49:51the mimic page
49:53tell the genset breaker to open
49:55and stop the
49:56generator
49:58but one thing many people forget to do
50:00at this point which is extremely
50:01important
50:03is to go back into the modules
50:05configuration
50:08and remember to change that nominal
50:10frequency back to 50 hertz
50:14because every time now that we want this
50:16generator to run and close the breaker
50:18we want it to run at 50 hertz if you
50:20don't make that change every time you
50:23close the breaker it will run at the
50:25wrong frequency
50:27so always remember
50:29go back change the nominal frequency to
50:31whatever that is my example 50
50:34and that is how we set the switch to
50:38for the governor
50:41now some of you may be wondering why do
50:43we use
50:4452.5 hertz in our test
50:47the reason we use 52.5 hertz or should i
50:50say up and down 2.5 but mainly 52.5
50:54hertz
50:55is because from a lot of testing we did
50:57many years ago at deep sea
51:00we found that on some engines
51:02as a general rule
51:04the
51:05throttle position of a generator running
51:07at 52.5 hertz at no load
51:11is roughly the same
51:13as a generator's throttle position
51:15running at 50 hertz at full load
51:18so in theory
51:19by us enabling you to prove you can
51:22drive up and down
51:2452.5 sorry up and down to 52.5 hertz
51:29you've effectively proved you can drive
51:31a generator at 50 hertz at full load
51:35and the reason why we use only eighty
51:37percent of the available range of the
51:39switch to to do this is just to give you
51:42a bit of
51:43leeway if you like because
51:45as i said the rule we've created is only
51:47a general rule it's not always correct
51:53so before we go into the switch to for
51:55the avr i'll just revert back to dave
51:57dave do we have any questions coming in
51:59that are worth while going over
52:03yes with one person asking
52:06um
52:07how do i how do i interface with my avr
52:09that is
52:11the same way as
52:13governor you would um connecting to
52:16wherever your potentiometer would be
52:19connecting to reference and signaling
52:24one gentleman is asking
52:26do we have a dse module with an inbuilt
52:29avr
52:30no unfortunately not but we do
52:32manufacture a range of avr's
52:35another gentleman's asking
52:37why does my
52:39generator go into reverse power that is
52:41because you have not either not enough
52:44or no governor control
52:54okay thank you for that dave so just
52:55going back i did actually see that the
52:57question was do we uh it's actually
52:59do we have some deepsea modules with an
53:01inbuilt avr i i believe what the
53:03customer is referring to is what the
53:06co-map module has which is an external
53:08avr interface for isolation purposes the
53:11good news is yes all sea synchronizing
53:14units
53:15the governor and avr terminals are
53:17isolated the governor is isolated up to
53:201 000 volts and the avr is isolated to 3
53:23000 volts so there is absolutely no need
53:26to have any form of external
53:29interface between the deepsea modules
53:31governance or avr output to the
53:33respective governor avr
53:35for isolation purposes because we have
53:37it all built in
53:40and to kind of cover again uh reverse
53:42power will
53:43reverse power is is basically is an
53:45issue with with the engine's governor
53:47and normally by doing these four steps
53:50you will find the problem there are lots
53:52of things that can cause reverse power
53:54but we'll cover that more towards the
53:55end of this presentation
53:58uh
53:59i can already see as well as another
54:00question coming about i'm guessing the
54:02customer is asking um does the deepsea
54:04module in in this setup procedure is it
54:07wired to the generator's breaker and yes
54:10a part of this setup procedure we are
54:12asking you to
54:13open and close the generators breaker
54:15because this step whilst it's meant to
54:18be setting up the deepsea modules
54:19control over the governor and
54:22avr
54:23we are not just testing the governor
54:25navy we're testing other things so this
54:27was asking you to prove the governor and
54:29sorry the deepsea module can open and
54:31close the breaker it's just another test
54:37we'll uh we'll carry on with the with
54:38the presentation now so
54:40what we're going to look at now is how
54:42do we set up the switch 2
54:45for the avr
54:47now the setup procedure for the switch 2
54:49of the avr is effectively exactly the
54:52same as the governor
54:54the only difference this time rather
54:56than talking frequency we're talking
54:57voltage so we go to the nominal voltage
55:01and we're going to increase the nominal
55:03voltage by 10 percent
55:05so in my example that'll be two six four
55:10and we're gonna write that to the
55:11controller
55:13so just like before with the governor
55:15set up we're gonna increase the nominal
55:17voltage to 264
55:1910 percent
55:21we're then going to start the generator
55:23with the generator breaker open
55:25the generator would still run at its
55:27nominal voltage then as soon as we close
55:29the generator breaker
55:32you will see that the voltage will start
55:34to increase to that new nominal voltage
55:37in my example 264.
55:42so here we are starting the gen
55:43you can see the breaker is open
55:46we then go to the governor in avr
55:48interface and you can see the nominal
55:50voltage is still 240.
55:52once we close the breaker
55:56you'll see this time the voltage has
55:58correctly increased remembering that as
56:01we increased switch one of the avr the
56:03voltage increased so there's absolutely
56:05no need to output reverse on the avr
56:10but the voltage hasn't gone all the way
56:12to 264
56:13because our avr sorry our avr's switch 2
56:17is too small
56:18so next we're going to as you can see on
56:21the video increase the switch 2 value
56:23until we get an avr analog percentage of
56:2880 percent
56:32you'll end up seeing from this example
56:34that we have very different switch one
56:36and switch to values for the governor
56:38and avr
56:40it honestly does not matter what switch
56:43one and switch two values you get zero
56:45and three six and two ten and one
56:49honestly does not matter
56:51as long as you achieve what we're asking
56:53you to achieve the switch positions it
56:56doesn't matter
56:58so you can see now that we've ended up
57:00with quite a high switch to value for
57:02the avr
57:04and finally that avr analog has started
57:07to decrease
57:09we keep increasing that switch to value
57:11all the way until we get an avr analog
57:14percentage of again 80 percent
57:18looking for somewhere between 75 and 85
57:22percent
57:28so
57:29as i'm getting closer and closer in this
57:31example to the 80 i'm just slowing my
57:35clicks down as it were just to make it
57:38easier and not overshoot that 80
57:41i'm trying to achieve
57:47so here you can see we've got a very
57:48good value of nearly exactly 80 percent
57:52very nice
57:53so all i'm going to do now is go back to
57:55the mimic page
57:57open the generator breaker
58:00and stop the generator
58:05and then just like we did with the
58:06governor we're now going to decrease
58:09that nominal voltage by 10
58:12this would be 216 for my application
58:17and write that back to the controller
58:20just like before you'll start the
58:22generator it will still run its nominal
58:24voltage
58:25in my case 240 volts
58:28but then as soon as we tell the deepsea
58:30module to close that genset breaker the
58:33nominal voltage will then start to
58:35decrease down to that new nominal
58:37setting of 216. and again we're looking
58:40for a
58:42governor out sorry an avr output
58:45percentage of somewhere between
58:4875 and 85
58:52again remembering that you can only
58:54close the generator breaker
58:56once the led underneath the generator
58:58symbol has turned on
59:01so we're available
59:03close the breaker go back to that
59:05governor avr section and you'll now see
59:07that the voltage is starting to decrease
59:09down to 216 the new setting and you can
59:12see that our avr analog has resulted
59:16somewhere between 75 and 85 percent
59:22which is perfect no problems so all
59:25we're going to do now again is tell the
59:27generator breaker to open
59:29and stop the generator
59:31but again remembering very importantly
59:34to go back to the generator voltage
59:36section
59:37and change the nominal voltage back to
59:40what it should be in our example
59:43240 volts
59:47at this point what i like to do after
59:49i've written the configuration is just
59:51start the generator up again and close
59:54the generator breaker
59:56that will then ensure that the generator
59:58runs or should i say confirms that the
1:00:01generator runs at the correct voltage
1:00:03and frequency
1:00:04make basically proving that you've
1:00:06remembered to
1:00:09reset the nominal voltage and frequency
1:00:12so here i am starting the generator
1:00:14again
1:00:15just waiting for that generator to
1:00:18become available again the led under the
1:00:20button will indicate when that's the
1:00:21case
1:00:24close the breaker
1:00:26and now if we go to the governor and avr
1:00:28interface section you can see
1:00:31correct voltages and also you can see
1:00:33that the governor and avr analog
1:00:35percentages are very very small which is
1:00:38completely correct
1:00:41going back to what was asked originally
1:00:43what sort of values should we expect to
1:00:46see for the governor and avr analog when
1:00:48running
1:00:49our generator
1:00:52normally you would expect to see
1:00:54at full load
1:00:56no more than 10
1:00:58on your governor and avr analog
1:01:01percentage no more than 10
1:01:04however
1:01:05if you have droop enabled on your
1:01:08governor or avr
1:01:10then we would say
1:01:11no more than 30 percent
1:01:15at full load
1:01:17as a rule of thumb
1:01:19if you are seeing more than 50 percent
1:01:22on your governor and avr analog drive
1:01:25something is very wrong
1:01:27and more likely the problem is actually
1:01:30caused by
1:01:31having the incorrect switch one and
1:01:34switch to settings
1:01:40so one question we do get asked quite a
1:01:42lot of deep sea is what happens if i
1:01:45don't perform these steps
1:01:47well the first problem you'll see is
1:01:49unstable load sharing if you remember
1:01:51back to the earlier slides the deepsea
1:01:54module uses the governor and avr for
1:01:57both
1:01:58synchronizing and load sharing because
1:02:01it's con uses the governor to control
1:02:03kilowatts and it uses the avr to control
1:02:06cave arms so if we if we have bad
1:02:09control or no control over the governor
1:02:13and avr we will have very bad control
1:02:16over kilowatts and cave outs
1:02:19potentially leading to things like
1:02:20reverse power loss of excitation
1:02:24and as it says there unstable load
1:02:26sharing
1:02:28but as we're also
1:02:29using the governor and avr for
1:02:31synchronizing if you're having unstable
1:02:35erratic or long synchronizing times this
1:02:38also suggests that you have very bad
1:02:41switch 1 and switch 2 settings or no
1:02:44control over the governor or avr itself
1:02:49so before we go on to the next uh step
1:02:52i'd just like to refer back to dave dave
1:02:53do we have any questions coming in
1:02:57yes um my generator
1:03:01uh just a second
1:03:03how come i can't get the
1:03:05uh exact the exact result when adjusting
1:03:08the apr and governor um this is because
1:03:11the slider itself is stepped um
1:03:14you won't get have an issue during load
1:03:16sharing because the adjustment is much
1:03:18finer
1:03:23i'd just like to add a few points onto
1:03:24that as well um
1:03:26what david said is completely correct
1:03:27yes some sometimes you won't get exactly
1:03:2980 percent as dez mentioned because of
1:03:32how
1:03:33fine the switch to setting is and that's
1:03:35again not a problem that's why we've
1:03:36said you need to be in that range of 75
1:03:39to 85
1:03:41but sometimes you may come across a
1:03:43problem where for some reason you can't
1:03:45even get within the 75 to 85 window
1:03:50and this can actually be sometimes
1:03:51caused by
1:03:52settings on the governor and avr itself
1:03:56so just taking an avr i know from memory
1:04:00as an example
1:04:02uh if you were to look at the newage
1:04:04stanford mx or sx range of avrs
1:04:09they do actually have a potentiometer on
1:04:12the avr known as a trim potentiometer
1:04:16now this potentiometer does not set what
1:04:19voltage the generator runs at
1:04:22instead what it does is it sets how
1:04:25sensitive
1:04:26the
1:04:27input on that avr is
1:04:31for example
1:04:32if you set that potentiometer known as
1:04:35trim
1:04:36fully clockwise
1:04:38it makes the input
1:04:41very unsensitive
1:04:43basically
1:04:45it means that you will have a very very
1:04:47very small switch to value
1:04:49and sometimes you will never be able to
1:04:52achieve the 80 we're asking because the
1:04:54input range has been set very very wide
1:04:58on that avr
1:05:01conversely
1:05:03if you on that avr set the trim pot
1:05:06fully anti-clockwise
1:05:08that actually disables the input on the
1:05:11avr
1:05:12so no matter what the dc module's
1:05:14voltage does
1:05:16your
1:05:16a the deepsea module will be generating
1:05:18voltage that will go to the avr and the
1:05:21avr just completely ignores it because
1:05:23effectively the input's disabled and
1:05:26that would result in you effectively
1:05:27seeing a very very high percentage all
1:05:30the time because the deepsea module is
1:05:32trying to make an adjustment and
1:05:33nothing's happening
1:05:35so sometimes if you're seeing
1:05:37a problem where you
1:05:39are always stuck at a very high
1:05:40percentage or always look at a very low
1:05:43percentage
1:05:45that could be down to settings on the
1:05:48governor or avr itself
1:05:53i've just seen another question come in
1:05:55which is
1:05:57what is the percentage value that i must
1:05:59put in reverse power
1:06:01this is a
1:06:03not so much related to this course but a
1:06:04general rule of thumb five to ten
1:06:06percent is normal for a diesel engine in
1:06:09reverse power protection
1:06:20one another questions has come in saying
1:06:22is it possible to achieve this
1:06:23configuration of switch one and two on
1:06:25the dse module without a laptop
1:06:27currently unfortunately no that is not
1:06:29possible if you remember earlier i did
1:06:31say at the start of the presentation to
1:06:32do the dse four steps we do strongly
1:06:35advise that you do have a laptop with
1:06:37you because you will need it to do most
1:06:39of these four steps procedures
1:06:41the reason also being is that during
1:06:43these four steps you may come across
1:06:45other problems with module configuration
1:06:48and unless you have the laptop you won't
1:06:51be able to fix them so it's very
1:06:53important that whilst doing
1:06:54commissioning or fault finding which is
1:06:56effectively the dse forceps the
1:06:58synchronizing that you do have a laptop
1:07:00with you
1:07:11another question just come in saying can
1:07:12two gen sets with different kva ratings
1:07:15effectively different kilowatt and kvr
1:07:17ratings synchronize and load share using
1:07:19the deepsea modules yes that's perfectly
1:07:21acceptable again if you remember back to
1:07:24the one of the first slides i had i did
1:07:26mention how the load sharing works with
1:07:28deepsea
1:07:29and we do support load sharing of
1:07:32different size gen sets because what we
1:07:34do at deepsea is we do not share the
1:07:36load equally between the generators what
1:07:39we try to do is make sure that the
1:07:41generators are producing an equal
1:07:43percentage of power based on their own
1:07:45ratings so for example each generator
1:07:48would always produce 33 percent
1:07:52regardless if one generator was smaller
1:07:55or bigger than the other
1:08:12okay what we'll do is we'll carry on now
1:08:14with the uh
1:08:15with the presentation
1:08:17and we'll come back to questions in just
1:08:19a moment
1:08:25so the next step is to look at metering
1:08:31and we'll discuss now what do we mean by
1:08:33metering
1:08:34so really metering it's checking that
1:08:36the current transformers are wired
1:08:38correctly to the deepsea module
1:08:42so to do this procedure what we first
1:08:44need to do is make sure that the
1:08:45generator bus
1:08:47is not live and no other generators are
1:08:49connected to it so their breakers are
1:08:52open
1:08:57we're then going to start a generator
1:08:59and once available close the generator
1:09:01onto that
1:09:03bus
1:09:04and we do then need to apply a purely
1:09:07resistive load around 10 of the
1:09:10generator size
1:09:12to the bus
1:09:14now ideally this purely resistive load
1:09:17would come from a load bank and ideally
1:09:20the load bank would be a three-phase low
1:09:22bank as well
1:09:24now the low bank itself does not need to
1:09:26be big can be quite a small load bank
1:09:28because in this test we're not actually
1:09:30load testing the generator or testing
1:09:32its load acceptance or rejection
1:09:34capabilities
1:09:36we're just making sure that it can
1:09:38measure the kilowatts
1:09:40and current and power correctly
1:09:43now i do appreciate that in a lot of
1:09:45cases getting a kilowatt sorry a load
1:09:48bank to site or even during testing and
1:09:50manufacturing can sometimes be difficult
1:09:54so one thing you could try doing is
1:09:56maybe renting a single phase load bank
1:09:58to do these tests it just takes a little
1:10:00bit longer because you'd have to test
1:10:02each phase individually rather than
1:10:04testing all phases at once
1:10:07though in all honesty it doesn't
1:10:09actually have to be a load bank itself
1:10:13i've actually done this setup procedure
1:10:14myself without using a load bank by
1:10:17actually making my own load bank using
1:10:19electrical heaters
1:10:21effectively anything that is purely
1:10:23resistive
1:10:29so when we're doing the tests what we're
1:10:30looking for are the following issues
1:10:35we first need to check that
1:10:37all three phases when using a purely
1:10:39resistive load bank are at unity power
1:10:41factor a power factor of one
1:10:44if a power factor of one is not
1:10:46displayed across all three phases that
1:10:49then suggests that some of the cts are
1:10:51on the wrong phase
1:10:53so for example maybe the l1 ct has been
1:10:56wired to l2 and the l2 ct has been wired
1:11:00to l1
1:11:02if all the power factors are correct
1:11:06but the kilowatts are being displayed as
1:11:08negative
1:11:09then this suggests that the orientation
1:11:11of the ct
1:11:13or the s1 and s2 connections of that ct
1:11:17are the wrong way around
1:11:20so just to help explain this a little
1:11:21bit further
1:11:23i've got these diagrams and some
1:11:25readings to show what we'd see if
1:11:27everything was correct
1:11:28so on the right hand side here you can
1:11:30see we've got l1 l2 l3 all wired
1:11:33correctly to l1 l2 l3 and all the
1:11:36orientation of these cts is correct
1:11:39the load is on this side
1:11:42we can see everything is wired correctly
1:11:44because the deepsea module is showing
1:11:46the correct amount of kilowatts and the
1:11:49same kilowatts across all three phases
1:11:52and all the power factors are at one
1:11:55so in this case we know that everything
1:11:56is wired correct
1:11:58however
1:12:00in the next example
1:12:02for some reason the connections have
1:12:04been swapped over on the back of the
1:12:06deepsea module so the l1 ct has been
1:12:09wired to l2
1:12:11and the l2 ct has been wired to l1
1:12:14the first thing we need to check here is
1:12:16power factors so whenever doing this
1:12:19step number two the first thing you
1:12:21should always check is to see if the
1:12:23power factors are correct
1:12:25in this example
1:12:26even though we are powering a purely
1:12:28resistive load the same load that was
1:12:30just shown in the previous example
1:12:33we have incorrect power factors
1:12:36and this incorrect power factor here is
1:12:38caused by l1 and l2 being swapped over
1:12:44but in the same vein you can also see
1:12:49that the kilowatts are being shown
1:12:51incorrectly
1:12:54so this is why we always first we check
1:12:57the power factors
1:12:59because if the power factors are wrong
1:13:01this fault here causes two issues
1:13:04incorrect power factors and incorrect
1:13:06kilowatt readings
1:13:08so we first correct the power factor
1:13:11if after we've corrected the power
1:13:12factor problem this issue here
1:13:16and we still have negative kilowatt
1:13:18readings
1:13:20this then means
1:13:21s1 and s2 of the ct have been swapped
1:13:25over or the physical orientation of the
1:13:27ct is wrong
1:13:30so you can see here
1:13:33l1 is showing negative kilowatts when in
1:13:35actual fact it should be positive
1:13:37kilowatts
1:13:42you can't always rely on the stickers or
1:13:45the indications or markings on the ct
1:13:48many times we have a deep sea come
1:13:50across ct's with
1:13:52plastic cases or stickers that are wrong
1:13:56because the iron core and the windings
1:13:59inside have been connected incorrectly
1:14:02so this test will always prove
1:14:05if the deepsea module is measuring
1:14:07kilowatts correctly
1:14:11so what happens if we don't perform
1:14:12these tests
1:14:14well again you will end up having
1:14:16unstable load sharing
1:14:18because just going back to the previous
1:14:20slides
1:14:22if we look at what was wired correctly
1:14:27here you can see that we should have
1:14:2910 kilowatts
1:14:31and no vas
1:14:34looking at the first problem we
1:14:35supposedly now have zero kilowatts and
1:14:38zero valves
1:14:41so we're reading power completely
1:14:42incorrectly on this generator
1:14:45or in this example we have zero vars but
1:14:48a lot less kilowatts
1:14:52so if the deepsea module
1:14:54cannot measure the power correctly
1:14:57it will not know how to load share
1:14:59correctly
1:15:01and if it does not know how to load
1:15:02share correctly your load sharing is
1:15:04going to be unstable
1:15:08another fault that we potentially could
1:15:10end up having here is false reverse
1:15:12power or loss of excitation alarms
1:15:16reverse power being excessive negative
1:15:19kilowatts
1:15:20and loss of excitation being
1:15:23excessive negative kvr
1:15:25again just going to the previous slides
1:15:29you will see
1:15:31here
1:15:32we have
1:15:33negative k vowels on one phase even
1:15:35though it should be zero and negative
1:15:38kilowatts
1:15:42so it's extremely important that we
1:15:44check the cts because if we do not
1:15:47it is very likely that you'll end up
1:15:49having bad load sharing and also
1:15:51spurious alarms for faults that do not
1:15:54actually exist
1:15:57before we go into the third step i'm
1:15:59just going to go back to dave to go over
1:16:00the questions that we've been asked
1:16:07one is does this theory apply to an ats
1:16:11yes our
1:16:128660 mark ii module carries out the same
1:16:15synchronization process and transfer as
1:16:18the as 286 10 mark twos do
1:16:21um
1:16:22only with the mains
1:16:31yeah i'd just like to add it to that as
1:16:33well actually because it's a it is a
1:16:34very good question so
1:16:37a lot of the steps that we're going
1:16:38through now are are applicable to
1:16:41an ats yes the governor and avia we've
1:16:43just gone through they technically
1:16:45aren't applicable to one of our ats
1:16:47units
1:16:48but if we're talking about synchronizing
1:16:50and load sharing application with the
1:16:52mains
1:16:52if the deepsea generator controller has
1:16:55bad control over the
1:16:57governor and avr
1:16:59that is going to affect your mains
1:17:01parallel because at the end of the day
1:17:05for the generators to synchronize with
1:17:07the mains
1:17:08it has to have good control over the
1:17:09governor and avr
1:17:11when that generator goes in parallel
1:17:13with the mains
1:17:14for that generator to control kilowatts
1:17:16and kvas it has to have good control
1:17:19over the governor and avr
1:17:20so whilst these steps are not
1:17:23specifically or step number one is not
1:17:25specifically for an ats controller it
1:17:28does indirectly affect ats controllers
1:17:31as well
1:17:32actually
1:17:34step number two
1:17:35number three and number four
1:17:38number two we've just done they are
1:17:40directly related to ats controllers at
1:17:43the end of the this is a generic
1:17:45synchronizing and load sharing setup
1:17:47commissioning and fault finding
1:17:48procedure which can be used with all
1:17:50deepsea products
1:17:55i've just seen now someone's asked a
1:17:57question can a one amp ct secondary be
1:17:59used with dse controllers rather than a
1:18:015 amp ct secondary the answer is yes
1:18:04most of our high-end controllers
1:18:07really 6000 series and up support 5 amp
1:18:11secondary seats sorry support one amp
1:18:13secondary cts
1:18:15um there are pros and cons for using one
1:18:18amp over five amp and five amp over one
1:18:21amp but unfortunately we do not have
1:18:23time to go over those during this course
1:18:24but yes with our synchronizing and load
1:18:26sharing controllers it is perfectly
1:18:28possible to use a one amp ct if you wish
1:18:36we've had another question come in
1:18:38saying what is the avr max trim and how
1:18:41to solve it i'm not sure what this is
1:18:44relating to but i'm going to have a
1:18:46guess of maybe it is the alarm avr trim
1:18:49limit
1:18:50if you have ever seen the alarm avr trim
1:18:53limit
1:18:54then this suggests that actually your
1:18:56switch 2 value and switch 1 value have
1:18:59not been set up correctly
1:19:01effectively what avr trim limit alarm
1:19:04means if it has been enabled in your
1:19:06controller
1:19:07is that the deepsea module is trying to
1:19:09request the avr to do more work
1:19:12but unfortunately it cannot
1:19:16this might be because the avr switch 1
1:19:19switch 2 have not been set up correctly
1:19:21so the deepsea module does not have a
1:19:23good enough range of control for example
1:19:26plus or minus 10 of nominal voltage
1:19:29or it could even be that you're
1:19:31requesting the generator to do something
1:19:33and it physically isn't possible so this
1:19:35might be for example asking a 100 kva
1:19:39generator to produce
1:19:41200k vars
1:19:43that's far too much for that generator
1:19:44to produce so when the deepsea module
1:19:47tries to request the avr to do that the
1:19:49avr
1:19:51physically doesn't have enough power to
1:19:53be able to ask the generator to do that
1:19:55and therefore gives you avr trim limits
1:20:00one question has been
1:20:03is there a possibility of the set going
1:20:05unstable when the breaker is first
1:20:07closed yes there is but
1:20:10your trip levels still apply
1:20:15and if the generator goes unstable when
1:20:17the generator breaker is closed that
1:20:19would actually suggest that you do have
1:20:21a problem with the
1:20:23pid gain and stability settings on that
1:20:25governor or avr
1:20:27depending on where the generator goes on
1:20:29the stable
1:20:30and we've had one last question come in
1:20:32saying the power system is delta three
1:20:34phase three wire do we need to remove
1:20:37the neutral connection in the controller
1:20:39well if it is a true
1:20:41three-phase three-wire delta system
1:20:43there is no neutral coming from your
1:20:45generator therefore you do not connect
1:20:48it
1:20:48the deepsea module does not need a
1:20:51neutral connection to work so if you
1:20:53have a three-phase three-wire delta
1:20:55system which natively does not have a
1:20:58neutral you do not connect anything to
1:21:00the neutral terminal
1:21:04there are people still asking about
1:21:06videos
1:21:07if you'd like to email in to support at
1:21:09deepsealectronics.com
1:21:12we'll be able to provide you with any
1:21:13information that you need from there
1:21:17okay we'll carry on with the
1:21:18presentation now then we'll go to step
1:21:20number three
1:21:23so step number three is checking the
1:21:25communications between the two devices
1:21:27or between multiple modules
1:21:30and by
1:21:31communication we're actually referring
1:21:33to the msc link
1:21:35msc by the way stands for multi-set
1:21:38communications link
1:21:41so what you first need to do
1:21:43you need to connect your dse module to a
1:21:45pc with the dse configuration suite
1:21:48software installed
1:21:51then you would go to the scada section
1:21:54of the dse configuration suite
1:21:56you go to scada generator and multiset
1:22:00and then what you just simply need to do
1:22:02is check that the numbers on screen
1:22:05match the numbers of controllers you
1:22:06have
1:22:08so sets on the bus relates to how many
1:22:128610s do you have connected on the msc
1:22:14link and mains controllers on the bus
1:22:17refers to how many 8660 or 8680
1:22:21controllers you have connected on the
1:22:23bus
1:22:26simply if the numbers don't match up
1:22:28there's a fault on the msc link
1:22:31now that fault could be
1:22:33anything to do with cabling
1:22:36incorrect termination etc but the
1:22:38easiest way to find out which controller
1:22:41has the fault
1:22:42is to go into each controller
1:22:44individually
1:22:46and look for whichever one is reporting
1:22:49one on the
1:22:51numbers because if it's only seeing
1:22:53itself that means the msc link is not
1:22:57equal it's not working
1:23:03one thing to remember though is what
1:23:04many people do to test the ms ceiling is
1:23:08they remove the wire from the back of
1:23:10the deepsea module
1:23:11and then
1:23:12reapply it to see if the alarm appears
1:23:15and then disappears
1:23:19one thing to remember
1:23:22the deepsea module
1:23:24will only give you
1:23:25an msc failure alarm
1:23:29if the
1:23:30modules msc link was working before and
1:23:35then has failed
1:23:37so for example if you were to turn on a
1:23:39deepsea module with no msc link
1:23:42connected
1:23:43you would not see an msc failure alarm
1:23:47that is because
1:23:48there was no working msc when the module
1:23:51powered up
1:23:52so just keep in mind that the msc
1:23:54failure alarm only appears when there
1:23:57was a working msc link and then it
1:23:59disappears
1:24:04so let's just do a bit of housekeeping
1:24:05and talk about what could cause msc
1:24:08failures
1:24:09the most common msc failures we find is
1:24:12people using the incorrect
1:24:14type of cable now the cable you should
1:24:16be using for msc communication is can
1:24:19bus rated cable
1:24:22now the cable we recommend is from a
1:24:24manufacturer known as belden
1:24:26and its part number is 984
1:24:31now this cable has a very special
1:24:34characteristic which is a 120 ohm
1:24:36impedance
1:24:38and again suitable for can bus
1:24:40communication
1:24:42the cable we also advise should be
1:24:45shielded or screened and shielded
1:24:49in theory
1:24:51any can bus rated cable will work with
1:24:53deepsea
1:24:55but we always recommend belden 9841
1:24:58because it's the cable we use here at
1:25:00deepsea for testing and we know it works
1:25:03we believe also it's some of the best
1:25:04cable you can buy
1:25:06but in theory as long as you have
1:25:07purchased can bus rated cable
1:25:11it should work fine
1:25:15the next most common problem we come
1:25:17across is wiring of the msc link
1:25:20on the board here you can now see how
1:25:22the msc link should be wired you can see
1:25:26it's wide in what we call a daisy chain
1:25:29type
1:25:30arrangement where we have wires going
1:25:33into the module and out of the module
1:25:36into the module out of the module
1:25:39you can also see there is a 120 ohm
1:25:42termination resistor
1:25:44at the start of the cable
1:25:47and the end of the cable
1:25:50it is very important that you wire the
1:25:52msc link in a daisy chain configuration
1:25:54like shown here
1:25:56and that you also put in a 120 ohm
1:26:00termination resistor at the start and
1:26:02end of the cable
1:26:04if you forget to put the termination
1:26:05resistors in this can lead to msc
1:26:07failures
1:26:09if you use the wrong type of cable this
1:26:12can lead to msc failures and if you do
1:26:14not wire in a daisy chain connection but
1:26:17instead
1:26:19this type of connection this will also
1:26:22lead to msc failures
1:26:25the difference between this type of
1:26:26wiring and the previous wiring is that
1:26:29it's not daisy chained we only have one
1:26:32set of cables
1:26:34in the
1:26:34terminals this will lead to msc failures
1:26:38so we advise strongly against what we
1:26:40call spur type wiring which is what is
1:26:43shown on the board now
1:26:48so going through what could be the
1:26:51problems if we don't do this test well
1:26:53if you remember earlier i did say that
1:26:55the msc link is used to tell each
1:26:57generator how much power to produce
1:27:01if the msc link is not working the
1:27:03deepsea modules won't know how much
1:27:05power each generator should produce and
1:27:07therefore your load sharing will be very
1:27:10very unstable
1:27:11it actually will be completely
1:27:13uncontrolled
1:27:15worse yet the msc also offers lots of
1:27:18protections to help prevent again
1:27:20against out of sync closures due to
1:27:23things like bus sensing failures
1:27:26so without having the msc link you will
1:27:28eventually encounter out of sync
1:27:30closures so it's very important that you
1:27:33make sure you i have a working msc link
1:27:41just looking at one of the questions
1:27:42that's just come in and it says what
1:27:44happens is the msc link fails for
1:27:46example the wire is cut
1:27:50well if you only use one msc link and
1:27:52i'll come back to what i mean by that in
1:27:54just a short second
1:27:55then the modules will no longer
1:27:57communicate as you can see here you
1:27:59potentially may have out of sync
1:28:00closures or no load sharing will work
1:28:03whatsoever you could end up having
1:28:04reverse power trips lots of excitation
1:28:07trips lots of problems
1:28:09but this is not necessarily now a
1:28:11problem with the 8610 mark ii
1:28:14controllers
1:28:16the advantage with using the 86 mark ii
1:28:19controllers
1:28:20is that you can actually wire two msc
1:28:23links
1:28:24so that means then if the first msc link
1:28:27fails the modules automatically revert
1:28:30to the second msc link effectively
1:28:32giving you msc redundancy
1:28:36but on top of that
1:28:38we also have a feature whereby if the
1:28:41msc link completely fails so for example
1:28:44msc1 and mse2 fails
1:28:48you can actually revert to a droop form
1:28:50of load sharing
1:28:53drupal form of load sharing basically
1:28:55means that the modules will carry on
1:28:57load sharing
1:28:58however
1:28:59the frequency and voltage will not be
1:29:02maintained at nominal but that is just a
1:29:04function of droop so at least there are
1:29:06redundancies built into the deepsea
1:29:08module if you choose to enable them and
1:29:10wire them
1:29:12in case of msc failures
1:29:25another question has uh just come in so
1:29:28saying so we have to connect two 120 ohm
1:29:30resistors even if we only have two gen
1:29:32sets
1:29:33that is correct if you have two gen sets
1:29:36five gen sets 32 gen sets it does not
1:29:39matter you must have a 120 ohm
1:29:43termination resistor at the start of the
1:29:45msc cable and at the end of the msc
1:29:48cable
1:29:50if you only have one generator on its
1:29:52own
1:29:53you can leave the msc terminals
1:29:55completely disconnected
1:30:05okay we'll carry on now with the final
1:30:07part of the presentation which is going
1:30:09through step number four
1:30:14step number four this is basically doing
1:30:17synchronizing checks across generator
1:30:19breakers to make sure nothing has been
1:30:21wired incorrectly
1:30:24so the way we're going to do this test
1:30:26we're going to start a generator and
1:30:29close its breaker
1:30:30making the generator bus live
1:30:37we then start a second generator and we
1:30:40do not close the generator breaker and
1:30:42that's very important because all the
1:30:44way through this procedure so far
1:30:46our generators have not been placed in
1:30:48parallel
1:30:50every step we've done so far has been
1:30:51done on each generator in turn in
1:30:53isolation
1:30:57we then navigate to the synchroscope on
1:31:00the deepsea modules display which you
1:31:03can see even if the deepsea module has
1:31:06not been requested to synchronize
1:31:09and then we measure across the open
1:31:11generator breaker
1:31:13for l1 l2 and l3
1:31:17and
1:31:18when the syncroscope shows the phase dot
1:31:20in the middle
1:31:22you should be seeing roughly zero volts
1:31:24across the open breaker
1:31:29problems could be that if two phases
1:31:32have been swapped over for any reason
1:31:34the deepsea modules display
1:31:36would show them in sync
1:31:39but actually when you measure across the
1:31:41breaker you will see that they aren't in
1:31:43sync
1:31:44now many people would assume that the
1:31:46deepsea module's inbuilt phase rotation
1:31:48protection would protect against this
1:31:51however that is not always the case as
1:31:54we will see in the next slides
1:31:58so here here is an example of a
1:32:00correctly wired breaker
1:32:03so in this case you can see that on the
1:32:05left hand side here the deepsea module
1:32:07is measuring l1 l2 l3
1:32:10at the breaker it's l1 l2 l3 and at the
1:32:14other side it's l1 l2 l3
1:32:17and when the dt module syncroscope is
1:32:19showing the two supplies in sync
1:32:22we are seeing zero volts across the open
1:32:25break
1:32:27perfect everything is okay
1:32:30however
1:32:32if the following mistake was made where
1:32:35for some reason the wires were swapped
1:32:37here between the deepsea module sensing
1:32:40and the breaker
1:32:42then unfortunately the deepsea module
1:32:44would not detect this problem until it
1:32:47is too late
1:32:49as you can see here on the left hand
1:32:51side the deepsea module is measuring l1
1:32:54l2 l3
1:32:56on the right hand side it's measuring l1
1:32:58l2 l3
1:33:00and it's measuring zero volts between
1:33:03them
1:33:04but because somebody has crossed the
1:33:06center the generator phase wires to the
1:33:10breaker
1:33:12actually we have 230 volts across this
1:33:15breaker here which the deepsea module
1:33:18does not detect because the fault has
1:33:20happened after the generator sensing
1:33:24so in this case the deepsea module is
1:33:26sensing zero volts
1:33:28therefore it is showing on the display
1:33:30everything is okay everything is in sync
1:33:34and then across the open breaker you
1:33:36would actually see
1:33:37230 volts
1:33:40at this point the deepsea module would
1:33:42request the breaker to close and
1:33:43everything would end badly
1:33:48some people say that they don't have to
1:33:50do these checks because they wire
1:33:53directly on the breaker themself
1:33:56on the lugs of the breaker so it's much
1:33:58more safe and secure
1:34:00unfortunately that is not always true
1:34:02because if you have a cross here
1:34:05and also to have a cross on the sensing
1:34:08wires
1:34:09you could come across the same problem
1:34:11so regardless of how you wire your
1:34:13sensing on the breakers further
1:34:15downstream it does not matter you should
1:34:18always do this phase rotation check
1:34:21across the breaker using a multimeter
1:34:23across the open breaker doing l1 l2 and
1:34:27l3
1:34:33if you do not do this check what could
1:34:35happen well you can clearly see that it
1:34:37could end up the generator closing out
1:34:39of sync
1:34:40if the generator closes out of sync
1:34:42unfortunately
1:34:44it goes back
1:34:45so it's very very important that you do
1:34:48these phase rotation checks
1:34:51but if if we just go back and remember
1:34:57you'll see that from step number one
1:34:59step number two and step number three
1:35:03if you did not perform those tests they
1:35:05all had a very common fault which was
1:35:08unstable
1:35:09incorrect
1:35:11unworking load sharing
1:35:14so
1:35:15lots and lots of times people will call
1:35:17us at deepsea and say i have a generator
1:35:19system where the load sharing is
1:35:20unstable what could be the problem
1:35:23well as you can now see the problem
1:35:25could be something with your governor or
1:35:28avr it could be something with the cts
1:35:31it could be something with the msc link
1:35:34so the four steps to synchronizing is
1:35:37not just a commissioning procedure it is
1:35:40also your fault finding procedure
1:35:43so whenever you have any form
1:35:46of load sharing issue or synchronizing
1:35:49issue
1:35:50the first thing that we would advise you
1:35:52do at deepsea is do these four steps to
1:35:55synchronizing
1:35:56i would say 95 percent of the time if
1:36:00you do the dse four steps to
1:36:01synchronizing you will find your problem
1:36:05and by finding the problem and doing the
1:36:07four steps in most cases you will also
1:36:10fix the problem
1:36:14the other advantage of the dsc forceps
1:36:17synchronizing is you're not necessarily
1:36:19just testing the deepsea module and its
1:36:22calibration
1:36:23you're also testing the generator as a
1:36:25whole
1:36:26so going back to the first procedure
1:36:29which was setting switch 1 and switch 2
1:36:31and making sure we could increase and
1:36:33decrease generator voltage and frequency
1:36:37if you remember i said the reason why we
1:36:39choose 52.5 hertz as one of the tests is
1:36:43that we can prove then that the
1:36:44generator
1:36:46in theory can produce
1:36:49full power at 50 hertz because it has a
1:36:52very similar
1:36:53uh actuator position as 52 hertz with
1:36:5632.5 hertz with no load
1:37:01so
1:37:01we've once had a customer who was doing
1:37:03the four steps
1:37:05and he was trying to drive to 52.5 hertz
1:37:08and unfortunately couldn't make it
1:37:11under further investigation they
1:37:13actually found they had an issue with
1:37:14their fuel pump
1:37:16and by doing the four steps they proved
1:37:18the reason why they were having load
1:37:20sharing issues actually wasn't anything
1:37:22to do with the deepsea module at all
1:37:24it was a fault with the engine
1:37:27now i can imagine that for some of you
1:37:29these four steps there's quite a lot to
1:37:32remember so the question then becomes
1:37:34well how do you remember
1:37:37it's quite easy really
1:37:39referring to the products operators
1:37:41manual
1:37:42everything we've gone through today is
1:37:44actually written down in the modules
1:37:46operators manual step by step
1:37:50and a lot of the information and
1:37:51diagrams i have used in today's
1:37:54presentation have actually been taken
1:37:56from the operators manual
1:37:59so we would always advise whenever doing
1:38:01any form of synchronizing and load
1:38:03sharing that you do have a copy of the
1:38:05products operators manual because in the
1:38:07commissioning section of that operator's
1:38:09manual you will find these four steps
1:38:12written down
1:38:17so just to conclude today's
1:38:20uh training seminar
1:38:23the four steps of synchronizing which
1:38:25we've gone through today they're used as
1:38:27both your commissioning and fault
1:38:29finding procedure you will see all the
1:38:31time at deep sea for your phones for
1:38:33technical advice we will ask you to do
1:38:35these four steps because in most cases
1:38:37you will find them you will find the
1:38:39problem by doing them
1:38:44there is a written procedure for the
1:38:45four steps included in the commissioning
1:38:48section of the modules operators manual
1:38:51all operators manuals are actually
1:38:54included
1:38:55as a part of the dse configuration suite
1:38:58software under the help menu
1:39:01so as i mentioned earlier as you need
1:39:03the laptop to do the switch one and
1:39:05switch to settings
1:39:06you'll already have the written down
1:39:08procedure because it's included in the
1:39:10operator's manual which is also included
1:39:13in the software under the help menu
1:39:18any unstable synchronizing or load
1:39:21sharing issues could be caused by
1:39:23problems with your governor avr current
1:39:26transformers or msc link
1:39:29by doing the four steps you will
1:39:32actually
1:39:34isolate where these issues are lying
1:39:41in addition to
1:39:43isolating where these issues lie
1:39:45potentially with the wiring or
1:39:46configuration with the deepsea module
1:39:48the four steps will also help you
1:39:50identify any potential external faults
1:39:54as well
1:39:57and again just to reiterate it again
1:40:00we strongly advise that you always
1:40:02perform the dsc four steps to
1:40:04synchronizing as a first step
1:40:06in commissioning or fault finding
1:40:09because in most cases by doing these
1:40:11four steps you will find your problems
1:40:13and you will resolve them
1:40:15obviously if you've gone through the
1:40:17four steps and you are still having
1:40:18issues
1:40:20by all means please feel free to contact
1:40:22us at technical support that's what
1:40:24we're here for
1:40:31so that concludes uh our
1:40:35uh training today um i'd just like to
1:40:37open up the q a section again for any
1:40:40more questions coming in
1:40:42um so please feel free uh if anybody
1:40:45doesn't have any questions and i'd like
1:40:46to thank you for participating the game
1:40:48today we will be uh soon putting some
1:40:51more training seminars online
1:40:56so please keep your eyes open for those
1:41:00we will be advertising them both on
1:41:02linkedin and via emails being sent out
1:41:05so if you are registered on our website
1:41:08please make sure you do accept any
1:41:10form of marketing information coming
1:41:12from us because we will be releasing
1:41:14more training courses that way
1:41:18so again if anybody has any further
1:41:19questions they would like to ask about
1:41:20anything that's being covered today
1:41:22please feel free to put them in the
1:41:23question and answer section
1:41:25um
1:41:26if not
1:41:28what i will do
1:41:30i will i will leave my laptop and the
1:41:32presentation going for another 10
1:41:34minutes if anybody has any questions
1:41:36they would like to ask please feel free
1:41:49i can see one questions come in uh yes
1:41:51the recording will be available to
1:41:54re-watch if you would like a copy of the
1:41:56recording please do send an email
1:41:58through to our technical support
1:42:00department
1:42:01the email address is just simply support
1:42:05deepsea electronics.com requesting the
1:42:08presentation and we can send you a live
1:42:10recording of that to re-watch at your
1:42:13leisure whenever you wish
1:42:27okay so i'd just like to say goodbye
1:42:29from myself again i'm going to leave the
1:42:31presentation open now for the next 10
1:42:34minutes if anybody wants to still ask
1:42:35some questions please feel free and i'll
1:42:37come back in 10 minutes time
1:42:41we've got dave question indicating what
1:42:43happens if i have a different switch to
1:42:45value when driving up and down
1:42:48uh simply choose the center value um it
1:42:51will be it'll be absolutely fine
1:42:56do i need an at least a load sharing
1:42:58module when you when using an ecu
1:43:02and load sharing with dissimilar sets if
1:43:05you have a set that is a conventional
1:43:07diesel and one set that is an engineer
1:43:10has an engine ecu they will they will
1:43:12launch here together but they both need
1:43:14low sharing modules
1:43:30okay i'm gonna leave the presentation
1:43:31here for five minutes please feel free
1:43:33to ask any other questions uh and i'll
1:43:35come back to those after i've had a
1:43:36quick break again thank you all for
1:43:37attending
1:48:37hello i've come back okay so i can see a
1:48:38couple of questions have come in um so
1:48:40the first question i can see here is
1:48:43just kind of i guess a general question
1:48:45uh in terms of deepsea modules is it
1:48:47okay
1:48:48for the deepsea module to control
1:48:51breakers
1:48:52using its dc outputs rather than the
1:48:54volt 3 outputs
1:48:58yes that's perfectly acceptable but just
1:49:00keep in mind that if you're going to be
1:49:02using the deepsea modules dc outputs
1:49:05they're only rated to 2 amps dc
1:49:08so really you would have to use the dc
1:49:11output to drive a vault-free contact
1:49:15such as a relay and then use that to
1:49:18then drive your
1:49:19switch gear
1:49:21so there's nothing wrong with using the
1:49:22dc outputs just that we would always
1:49:24advise using external slave relay
1:49:26because they're only rated at two amps
1:49:31i can see another questions coming again
1:49:33relating back to current transformers so
1:49:35i'll just do a quick rundown of current
1:49:37transformers before we we end the
1:49:38session today
1:49:40so current transformers come in two
1:49:42variants a one amp secondary and a five
1:49:45amp secondary
1:49:47each has its own pros and cons
1:49:52normally
1:49:53where possible we would always advise
1:49:55using a 5 amp secondary
1:49:58the reason for this is a 5 amp secondary
1:50:02has a much higher
1:50:05precision
1:50:06for example
1:50:07if you had a 100 to 1 amp ct
1:50:11you've only got 0 to 1 amps to reference
1:50:14100 amps
1:50:16whereas if you're using a 100 to 5 amp
1:50:19ct
1:50:21you have 0 to 5 amps
1:50:23to reference the same 100 amps
1:50:26effectively you're getting 5 times the
1:50:28precision
1:50:30making your reading far more accurate
1:50:34so normally it is always better to use a
1:50:365 amp ct because the reading you will
1:50:38get from a 5 amp ct is normally more
1:50:41precise
1:50:43though there are downsides to using 5
1:50:45amp cts
1:50:49because you could potentially be
1:50:51outputting 5 amps from a 5 amp ct
1:50:54this does mean that the va rating of
1:50:58your ct will have to be much higher
1:51:02for 5 amps
1:51:05in what we mean by va rating va rating
1:51:08is the power output of that ct
1:51:13and the va rating of a ct has to be
1:51:16larger than the
1:51:19va consumption of a deepsea module
1:51:22which is 0.5 va
1:51:25and the va consumption
1:51:28of the cables you are using in between
1:51:31the deepsea module
1:51:33and the cts
1:51:37normally the larger the diameter of the
1:51:40cable
1:51:41the smaller the va burden that cable has
1:51:45the va burden of a cable increases with
1:51:48cable length
1:51:50so
1:51:51a one millimeter square cable running
1:51:54one meter will have a larger va burden
1:51:57than a 2.5 millimeter square cable
1:52:00running the same distance
1:52:03so if your cts are a large sorry a long
1:52:08distance away from the deepsea module
1:52:11that would mean your cables potentially
1:52:14will have a very high v8 consumption
1:52:16rating
1:52:17which then means you would have to
1:52:19purchase a 5 amp ct with a very high va
1:52:24va output to accommodate for that
1:52:28the next thing to keep in mind with va
1:52:30ratings of a ct
1:52:32normally when you purchase a ct it
1:52:34doesn't have
1:52:35one va rating
1:52:38it actually has numerous va ratings for
1:52:42different accuracies
1:52:44so for example for one percent accurate
1:52:47it may only have a va rating of
1:52:51three
1:52:52but for two percent accurate it may have
1:52:54a va rating of six
1:52:56for five percent accurate it may have a
1:52:59va rating of 12
1:53:01for example
1:53:03so when you purchase a ct
1:53:05you first need to make sure that the va
1:53:08rating of the deepsea module
1:53:10also the va rating of the ct is high
1:53:14enough
1:53:15at the accuracy class you require
1:53:18and because
1:53:20five amps
1:53:23will consume a higher va
1:53:25normally what most people will do for
1:53:27long cable distances they will use a one
1:53:30amp ct instead
1:53:32because one amp over the same cable will
1:53:35consume less va and therefore you can
1:53:39get away with having a lower va rated ct
1:53:44so in a nutshell to kind of summarize
1:53:47one amp cts have a benefit of normally
1:53:50you can run them over longer cable
1:53:53distances for the same va rating but you
1:53:56sacrifice precision and accuracy on the
1:53:59reading because you only have one amp of
1:54:01scale
1:54:03on the flip side of that
1:54:04five amp cts have five amps of scale so
1:54:07you have a much better precision and
1:54:09accuracy
1:54:10but
1:54:11you have a lot less cable run you can do
1:54:14for the same va
1:54:16i hope that answers your question
1:54:24another questions just come in actually
1:54:26about 86 mark ones and mark twos
1:54:31and in reference to something called msc
1:54:34compatibility
1:54:36mst compatibility does not need to be
1:54:39enabled when you're going from any
1:54:41version of mach 1 86 to any version of
1:54:44mach 2 86
1:54:48however
1:54:50you do need to enable msc compatibility
1:54:54if you are using an 86 mark one or mark
1:54:58ii with the older 75 and 5500 series
1:55:03products
1:55:05so the msc compatibility is only to make
1:55:08the 86 mark 1 and mark 2
1:55:12work with the dsc 55 and 7500 series
1:55:16products
1:55:20so before i finish the presentation for
1:55:22today do we have any last minute
1:55:25questions
1:55:39okay i can see that no other questions
1:55:40have come through so again i'd just like
1:55:43to
1:55:44thank everyone for attending and again
1:55:46please keep your eyes open on linkedin
1:55:49on our website and via email for uh
1:55:52information on upcoming courses again we
1:55:55do send emails out to everyone who's
1:55:57registered on our website
1:55:59so if you are reached on the website
1:56:01please make sure you are a part of our
1:56:02mailing list for upcoming training
1:56:05courses
1:56:06again thank you for myself ash and thank
1:56:09you from dave thank you very much and we
1:56:12look forward to seeing you again on our
1:56:14courses in the future thank you very
1:56:15much

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