Great video, it brought back a lot of memories of my days on the water in the Navy. No automation, everything done manually. Great experience. Thank you.
@Mr.V.2 жыл бұрын
damn so how many times u missed ur Phase angle, on the synchroscope.?
@dblake323 ай бұрын
@@Mr.V. ZERO!
@lotofforce35443 жыл бұрын
the phase sequence is usually the same for all generators on board)) What you really need is to monitor the INITIAL phase of the incoming generator so as not to cause BLACK OUT... and this done with syncronoscope..... And checking the phase sequence is really important in case of shore supply connection.
@gravelydon70722 жыл бұрын
We never had a synchroscope on our units. They were able to be put on in either manual or automatic mode. All we had were the meters and the two light bulbs. All the rest of the things we could do manually or let the gensets' controls do it as shown in the video. Two 125 kW 480V 3 Phase units driven by Detroit Diesel 6-71s which had electronic governors on them. They were installed in 1979 and we used them until replaced in the early 2000s with Kohler Gensets which were rated at 150kW that could not be paralleled. The D-D gensets were air starts but manual starting only while the Kohlers were automatic battery start units. Our electrical control panels for the D-D units were kind of dangerous as if you did not know what you were doing, you could backfeed into the grid. Which is why only certain people were allowed to open the doors on the control panels to get to the motor operated circuit breakers if they tripped out the motor units on the breakers. The normal prevention of backfeeding was a keyed lock system that had just one key which was used for both the grid power and the generator power. If you wanted Grid Power, the key had to be removed from the Gen Power breaker lock which could only be done in the off position. If you wanted Gen Power, then the key had to be removed from the Grid breaker lock with it in the off position. The key had to be in and turned in whichever one you wanted to be able use. The key served two purposes as it both locked/unlocked the breaker controls and also enabled/disabled the motors on the gen breakers. The breakers also had manual controls on each of the Genset breakers.
@Rolhenw2 жыл бұрын
@@gravelydon7072 wow, no synchronoscopes? Did you at least have the 3 bulbs or the 2 blinking bulbs? Or did you just have to monitor the frequency and hope the phases are correct?
@Rolhenw2 жыл бұрын
@@gravelydon7072 oh sorry i oversaw the part where you mentioned you had the 2 blinking bulbs, well than everything is fine, i can work with them just as well. But i prefere a proper synchronoscope
@travelhumor62013 жыл бұрын
Another parameter for synchronization is the phase angle, that is why we use the synchroscope
@firestormv013 жыл бұрын
I'm not sure how I got here but this is a fascinating video. Now I know how to synchronize two marine generators, lol. And yes, that step 3 is important!
@jonnic20003 жыл бұрын
a great explanation in first person POV. thanks. I was sort of scared of the breakers closing noise and half expecting a flash over, but then this isn't one of those "when synchronisation goes bad" videos!
@timhinchcliffe53722 жыл бұрын
You've piqued my interest now.
@chuckels4313 жыл бұрын
If I remember correctly back in the 60s we used what was referred to as the 3 bulb method on board ships, don’t remember exactly but it had to do with the bulbs all going out then you could tie the generators together.
@harotaro10673 жыл бұрын
The 3 bulb is just next to the synchroscope meter. It is when the 2 bottom bulb has the same brightness is the time to break in the ACB.
@robertreite46303 жыл бұрын
Yes I remember the three bulb method for when there was no syncroscope. Also could use the three bulbs to make sure that the phase rotation was correct..
@abcdef-kx2qt3 жыл бұрын
SAME THING AT LATTC LOS ANGELS - NEVER USED ANY PART OF THE SCHOOLING !!!!!!
@Jerry.m8372 жыл бұрын
Dark lamp method
@David0lyle2 жыл бұрын
The dark lamp system is the one I know. When the phases are in synch then there’s no difference between phases so the lamp doesn’t light. Seems simple enough. Of course someone couldn’t leave well enough alone so there are various other lights that tell you other things 🤔 and naturally no one bothers to label these things. It shouldn’t be complicated but somehow it is.
@parkerholden71402 жыл бұрын
Good video, I do have some suggestions. You need to explain droop of the governors and droop of the voltage regulators Droop of the voltage regulator is critical to sharing reactive load. The voltage regulator droop signal is generated by a CT on B Phase of each generator, This signal is polarity sensitive and all hell brakes loose with reactive load swings if the polarity is not correct. A and C phase voltage goes to the to voltage regulator sensing. Most parallel generation uses this so called "droop control' Some very modern systems are fully computer controlled and do not use the droop method. Real load share with governor droop control is a bit simplier. I have worked on many marine and a few stationary application of 2 or more generators and frequently see parallel operation not working. This frequently leads to either/or operation or very short parallel operation followed by turning the original unit off as loads start to swing around. Your explanations of synchronization are good.
@dblake323 ай бұрын
This is a wonderful video. Takes me back 50 years. The voltage you describe at t=1:00 is peak-to-peak voltage. However, the instruments on your panel indicate Vrms. The relationship between the two is Vpp = 2.828 * Vrms. For the generator to indicate 440 V, Vpp would be1244 V. I don't think you made a mistake when you paralleled the generators. Much more important than turning off the synchroscope is to stablize the load on the incoming generator. If you don't pick up some load, you risk losing it on a reverse power trip. Turning off the scope should be the last step. Good job.
@mykytazubrilov56773 жыл бұрын
Best video explanation that I ever seen! Please conteen in same way!
@XitriyDmitriy3 жыл бұрын
kzbin.info/www/bejne/hKqXXnmthNyFhbs
@markroymangrobang10723 жыл бұрын
Thanks!
@celsojoven35253 жыл бұрын
Soutwoods city
@gosho03 жыл бұрын
@@markroymangrobang1072 We need new videos !
@ZYXYZLF5 ай бұрын
Thanks for such an informative video. I highly recommend this videos to those people who are interested to learn and work safely in industries. This video solved lot of confusion. 😊
@GamersTrashTalk2 жыл бұрын
So glad i found this video, i was so confused as to how i would ever run my backyard powerplant
@markroymangrobang10722 жыл бұрын
Lol
@farshidmehrtash41153 жыл бұрын
Ok, so I'm a programmer, never been on a boat or inside a power planet, but for some reason, I watched the video till the end!
@ThumperKJFK3 жыл бұрын
Mark that was a very good video on how to sync two or more gen in parallel. But please next time you do a talking video don't keep adjusting the sound of the music up and down when you take a breath, that just hurts the ears. and if I lower my volume, I can't hear what your saying. Music is not needed on tech videos. thanks. leave the volume to music at a set low level.
@Rolhenw2 жыл бұрын
Yeah please dont use music at all, the electric humming and gen sounds are way better!
@pieterbarneveld95182 жыл бұрын
It’s fantastic that people sitting at home can finally see what us engineers do every day. Everyone just thinks it’s easy…. Little do 5hey know what it’s like when it goes wrong and you have a blackout… and an angry chef ☺️
@jimprice19593 жыл бұрын
Great video. I used to do this when testing generators on US Navy ships. One thing....You show how to move the "real" load (KW) from one generator to the other with the governor controls but you don't show how to move the "reactive" load (KVA) by adjusting the voltage regulators.
@DantalionNl3 жыл бұрын
Perhaps the facility has power factor correction to ensure the generators never see any reactive load.
@jimprice19593 жыл бұрын
@@DantalionNl Doesn't work that way. The governors control the "real" power (KW) and the voltage regulators control the reactive (KVA) power. Adjusting them will move the real and reactive power from one machine to another.
@akashpt3 жыл бұрын
There comes the AVR.
@WarpFactor9992 жыл бұрын
@@jimprice1959 Yep, it be so. I was amazed to actually see real and reactive loads moving around between generators the first time I ran the on-board electric panel on a nuke boat. (It's one thing to know the theory, another to actually see it.) When I went to work at a commercial nuke plant, you could see megawatts of reactive power being accepted / rejected according to the voltage settings.
@jimprice19592 жыл бұрын
@@WarpFactor999 Sounds like you've "been there." I worked at the San Francisco Naval Shipyard back in the 1960s. When we were testing the ship service generators we would need to move the ship from ship service to shore power. We weren't supposed to parallel with shore power but if they were testing radar sets they didn't want us to drop power--even for a couple of seconds. We would use the governor and voltage regulator controls to move the real and reactive power so that there would be no power when we opened or closed the bus tie breakers.
@hillarious23933 ай бұрын
I work with 3512 CAT diesel generators 1 MWt, and Cummins qsx15 - 400 kWt diesel generators for 10 years, and first time in my life see a manual syncronization
@francisdsa67903 жыл бұрын
Thankyou for very good explanation and demonstration God bless you 🙏💐👍👌
@amalbinoy98923 жыл бұрын
Hey, your videos are extremely well made and informed, Thanks for your help.
@markroymangrobang10723 жыл бұрын
Thanks!
@andyhandyman21183 жыл бұрын
Thank you bro. I wish you made video with solid step-by-step instructions... but like and subscribed anyways. Please make more videos about electrical systems ,controllers, relays,etc...
@jeffcibulka41862 жыл бұрын
Very interesting. Thanks for sharing
@xKilXlerx3 жыл бұрын
That vessel design is almost sesame as my last vessel
@UDAYKUMAR-bx5sx3 жыл бұрын
Really good explanation Sir
@markroymangrobang10723 жыл бұрын
thanks
@venmuana64012 жыл бұрын
THANKS PO, NAPAKALAKING TULONG, LALO NA SA AKIN NA TAGAL NG TAMBAY,HEHE MEDYO NALILIMUTAN NA
@HarryWHill-GA2 жыл бұрын
By the numbers. Bravo Zulu (Well Done)
@mariodazo7719 Жыл бұрын
Most of the panel control now a days are automatic. Synchronization resolve without touching any switches.
@Jeremy_Moro2 жыл бұрын
I finally learned what is reverse power and how bad it is
@kv8483 жыл бұрын
Great video sir
@statinskill2 жыл бұрын
Some of this is really good to know stuff. I can see myself in the post-American era restarting a powerplant. But I probably won't have to synchronize it to the grid when that time comes. I know so little about this stuff, just barely enough to be dangerous.
@yahiaosman88553 жыл бұрын
Thank you for gooood explain, I'm waiting more video 💯
@KewalPatel1003 жыл бұрын
this is so informative.. thank you so much
@car91673 жыл бұрын
220V RMS is not having the max at +220V and the min at -220V
@nikclev3 жыл бұрын
Yeah.. I saw that too. 220V peak would be 155 (ish) V RMS wouldn't it?
@car91673 жыл бұрын
@@nikclev Yeah..you have to multiple with the square root of 2 to get the peak so 220 X 1.41 = 310. So that would be -310V to +310V, 620V peak to peak. For 110V US would be -155V to +155V total 310V peak to peak
@terasakielectricco.fareast52382 жыл бұрын
One of our switchboards 😃
@jix1773 жыл бұрын
Very good explanation.
@markroymangrobang10723 жыл бұрын
Thank you!
@arunkumars24832 жыл бұрын
Why synchroscopes have to switched off , before load sharing?, sir
@arvinelishaeddmerelos49134 жыл бұрын
very useful sir! thanks
@vigneshji75663 жыл бұрын
Thank you very much sir...!!!
@mistakelove77484 жыл бұрын
Very informative, thanks,
@akashpt3 жыл бұрын
3:28 it's the most crucial step.
@manuelg.galesjr.95413 жыл бұрын
Ang galing nman ng vid nyo lods
@markroymangrobang10723 жыл бұрын
Salamat lods
@niczoom3 жыл бұрын
Really interesting, thanks.
@markroymangrobang10723 жыл бұрын
Thank you!
@jeffsonsalcedo95922 жыл бұрын
Hi Sir. Can we request you an explanation how is the elctrical distribution from generators, Busbar to switchears to load side. And protection breaker
@brandondan74363 жыл бұрын
Nice video. What does reverse power mean? And how do we fix it?
@Znyggisen3 жыл бұрын
Reverse power means that the fuel needed to keep the engine running at grid frequency is not enough. As the engine is connected to the grid, however, it can't slow down because it is magnetically coupled to the grid, so it will always rotate at grid frequency. This means that the other generator needs to supply additional power to keep the secondary engine running, and this is "reverse power". You fix it by increasing the fuel to the secondary generator so it acts as a generator and not a load. It's also helped somewhat if the engine you connect runs at a SLIGHLTY higher frequency than the grid. at 4:15 you can see that the video talks about the second engine running slower than the grid if the rotation is . You can connect the generator in either case, but if the syncroscope rotates to the , it, in theory, generates a TINY bit of power as the engine has to slow down to match grid frequency instead. In either case, as long as you increase the fuel (if you are on manual) immediately after connecting, it will generate some power.
@brandondan74363 жыл бұрын
@@Znyggisen thank you very much for ur explanation!! Wished u were my engineer onboard 🙏🏼
@Defianthuman4 ай бұрын
Are all three generators ever used at the same time?
@teambb78053 жыл бұрын
hello! in normal condition load on 1 generator V-440 Hz-60 KW- 300 A-227 Did you encounter the next problem when are in parallel with the same load? 1 -V - 440 2-V440 1 -Hz - 60 2 -Hz -60 1 -KW -150 2 -KW -150 but the Amp they increse at 200A almost on both of them thx!
@Rolhenw2 жыл бұрын
I guess these are Amps per Phase am i right? So 440A at 227A per phase, so 681A in total are 229.6 kW, pretty much exactly the 300kW it should have. So your problem is, the gens have 440V and have an Output of 150 kW so they should run at 318A in total and 108A per phase. Your question is why the Amps increase to 200A. Maybe your system was running on Auto mode and automatically regulated the voltage to ensure that the reactive load gets distributed evenly between the generators. So they will accept/deny the same amount of reactive load. Did you double check that they were running at 440V? If they are transformer connected maybe they regulated the voltage, or maybe the voltage got directly regulated at the generators by changing the power of the exciter. They had to run at 250V at 200A per Phase, 600A in total to run at 150kW.
@radekbabicz61254 жыл бұрын
If you are adjusting avr parameters on the DG that is not even on net, then God bless you but sign off. Read about adjustment of AVR from ABB manuals or at least from manual available on board.
@markroymangrobang10724 жыл бұрын
radek babicz yes that is right. Always consult to the manual. Not all generators and machineries are the same.
@poly_hexamethyl2 жыл бұрын
What happens if you accidentally connect the generators together when the synchroscope is pointing down? Is that like a short circuit and the fuses will blow?
@emremuslu6862 жыл бұрын
great video thanks for the informations. I did not fully understand how the "switch" that appears at the 3:07 works. should it be selected as "bus" for the incoming generator? Can we say this briefly?
@emremuslu6862 жыл бұрын
im correcting; for the "service generator" :)
@lashaberidze8101 Жыл бұрын
Friend, how to check diesel generator oil pressure sensor and water temperature sensor? Is it working properly?
@hera61812 жыл бұрын
Thanks a lot.. 👍🏻
@sameerpatil20013 жыл бұрын
Thanks man❤️
@dipikasalunkhe53233 жыл бұрын
Which components are required to make synchronizing panel using synchroscope?
@terasakisingapore33962 жыл бұрын
We have made thousands of those switchboards 😁😁😁😁😁😁
@markroymangrobang10722 жыл бұрын
Wow. I would love to see how you made those. Great job.
@terasakisingapore33962 жыл бұрын
@@markroymangrobang1072 You are most welcome to come for a factory tour 😃
@MrPlátano-m8e3 жыл бұрын
Are you a 1141? Also how’d u study for the electrician side for the asvab?
@najinkunnath60093 ай бұрын
Why 1 Air Circuit Breaker on one side and other 2 Air Circuit Breakers on other side in main switchboard ?
@LoneWolfZ3 жыл бұрын
so you use engine throttle to adjust the amount of contribution from each unit?
@markroymangrobang10723 жыл бұрын
Frequency is proportional to speed of generator engine sir.
@LoneWolfZ3 жыл бұрын
@@markroymangrobang1072 Yes, but when 2 generators are synchronized, what controls the power output balance? Thank you for answering!
@markroymangrobang10723 жыл бұрын
Increase speed governor for underload generator Decrease speed governor for overload generator Do these until load is balanced
@danielplusben3 жыл бұрын
@@markroymangrobang1072 Will that not have an impact on frequency? Like you said the frequency is proportional to the speed of the engine.
@markroymangrobang10723 жыл бұрын
@@danielplusben it will affect the frequency. Let's say the bus bar's frequency is 59hz, to make it 60hz, you must increase speed of the running generator through its speed governor. If two generators are connected, increase speed of the two generators with equal amount to maintain load on both generators.
@saddambaloch72352 жыл бұрын
I need to learn about electrical safety on ship
@andyxox41682 жыл бұрын
Assuming the machines are direct connected rather than transformer connected how do you ensure reactive power sharing?
@Rolhenw2 жыл бұрын
You have to adjust the voltage regulators so that more/less reactive power gets accepted/rejected.
@Rolhenw2 жыл бұрын
Oh sorry you are talking about direct connected rather than transformer connected.. i overred that... well then i dont know for sure, but i guess by changing the power of the exciter you can regulate the voltage of the generator so that it can accept/deny more/less reactive power. If the gen uses a permanent magnet instead of an excitercoil i have no idea how to realize that without a transformer.
@andyxox41682 жыл бұрын
@@Rolhenw so your ship generators are transformer connected? What voltage do you generate at?
@Rolhenw2 жыл бұрын
@@andyxox4168 i have nothing to do with ship generators, sorry 🤷♂️ and i already corrected myself by saying you need to change the exciter power to regulate the voltage
@andyxox41682 жыл бұрын
@@Rolhenw being a marine electrician I assumed you were on boats, still having been on land based generation for +35 years I can tell you your answer is substantially wrong 😑
@richardpqpendleton43862 жыл бұрын
AMAZING!
@ClosestNearUtopia2 жыл бұрын
I may hope you run this synchronous yes, because no net coupled generator cant run without..
@JS-jz2bi3 жыл бұрын
Sir, ano po ba pinagkaiba ng nakatapos ng electrical engineer sa ibang electrician na di nakapagtapos pero parehong may ETO, tanong lang sir😊 as an Electrician na Nagpaplano palang mag onboard, im 20 years old pa lang po sir and nag iipon pa para maka sampa at gusto ko lang rin humingi ng advice😅 as a Beginner 😅
@raghavanghatge75962 жыл бұрын
In panel how you would come to know about same phase by looking please tell
@life_xplorer3 жыл бұрын
At last no voice... Hopefully u will give best video next time
@elusionzsun4 жыл бұрын
Hi sir, can we get in touch? I wanted to know more about collecting seatime before the oral exam for COC. I’m currently taking the ETO course. :)
@JimWhitaker2 жыл бұрын
Been there, done that many, many years ago.
@sandordugalin89512 жыл бұрын
So how much money do make pressing a few buttons?
@chief1136 Жыл бұрын
sir how much is normal amperage for DG
@melaniecotterell82632 жыл бұрын
try running them in series
@Sidicas2 жыл бұрын
7:55 The real question we need answered is which lady is that on the wall?
@MuhammadMujahidIqbal-l5v8 ай бұрын
where are you from friend
@ptmayotehnikbali672 жыл бұрын
Please explain, why when doing the generator synchronization process, the syncronoscope appointment must turn clockwise
@Megacheez2 жыл бұрын
if the syncronoscope is running counter clockwise it means the incoming generator is running slower then the running generator (ie, less then 60Hz) that would result in a draw on the existing generator. Electrically speeding the incoming generator up till they come in sync. Or more likely it would trip a safety as the incoming generator isn't generating but drawing power from the bus (in effect behaving like an electric Motor.) If the incoming generator runs slightly faster then it will start out with some minimal push of power into the system and not trip the safety.
@ptmayotehnikbali672 жыл бұрын
@@Megacheez very amazing your answer thank you
@edisupono23353 жыл бұрын
Good 👍
@polymetric26143 жыл бұрын
What happens if one genny turns off/runs out of fuel/etc and it's still connected? Does that ever happen at all? The power head would act as a motor and pull a ton of current, I guess it would trip the breaker? Would it trip before causing damage to the prime mover? I know connecting when it's not synced does that.
@parkerholden71402 жыл бұрын
The normal method to deal with this situation with parallel synchronous generators is to use reverse power relays which will trip the breaker. This is often not done on smaller installations because of cost Motorizing the generator in itself is not going to cause damage but on diesel prime movers the injectors are likely to foul over time. On steam turbine or water wheels damage is not likely Stator overcurrent protection is always there.
@polymetric26142 жыл бұрын
@@parkerholden7140 Interesting! Thanks for the response!
@uploadJ2 жыл бұрын
Yes - "reverse power breaker" relay tip would/should occur ...
@bene54312 жыл бұрын
It wouldn't pull a huge amount of current because the generator is already at speed and synced and just pulls what it needs to keep running, but of course it would be a waste of power so you don't want it to happen even with steam/water
@JamesLee-oe7mt2 жыл бұрын
What keeps them precisely synchronized after?
@uploadJ2 жыл бұрын
Magnetic locking of the fields in each on-line gen. Basically.
@setoman12 жыл бұрын
Full bridge rectifier!
@유우-l6t2 жыл бұрын
I dont think this helps me with replacing my brake pads but sure i watch it
@aravindraj82054 жыл бұрын
Nice sir
@arnellimbaga11803 жыл бұрын
Sir mag tatanong lang po ako.. dba sabi mocsa final. LOAD IS ADDED TO AVOID THE GENERATOR BECOMING A LOAD.... ano po ibog sabihin sa tagalog..
@markroymangrobang10723 жыл бұрын
Magiging electric motor na siya, hindi na generator. Siya na yung kumukunsumo ng power imbis na siya yung nagbibigay.
@victormagtanggol66323 жыл бұрын
PWEDE BANG I AUTOMATIC NALANG ANG PAG LOAD SHARE? THANK YOU♥️
@markroymangrobang10723 жыл бұрын
Pwede po, kahit isang pindot lang, automatic na aandar at mag paparallel
@bzzbrynofficial74443 жыл бұрын
🙏🙏🙏
@TechTed13 ай бұрын
is not parallel as time you ndont start at the same time and the current is not i phase by chirchof law
@train49052 жыл бұрын
Exellent
@polymetric26143 жыл бұрын
If the two gennys are in parallel, how can they have different loads?
@polymetric26143 жыл бұрын
Watched another video. I think it has to do with one being faster and having more throttle/steam/whatever than the other, and probably voltage too? so it wants to push more current onto the bus bar
@yyyyy3543 жыл бұрын
Depends on the throttle state of each generator' governor. Increasing throttle means letting more fuel combusted, hence more potential power
@polymetric26143 жыл бұрын
@@yyyyy354 Ah, gotcha. it's really cool that you can control that
@Znyggisen3 жыл бұрын
@@polymetric2614 As Yuu-kun said, power output is governed by how much fuel the engine recieves. The load on each generator is controlled by how much lag there is between the magnetic field of the generator vs the grid, with the generator with the biggest load being like a bigger magnet. All generators always have identical speed and voltage, regardless of load.
@florin6042 жыл бұрын
Where is the generator
@vishnu.k47374 жыл бұрын
Sir what is u r salary? And what traine eto salary? Please me
@tirupathirao88863 жыл бұрын
Why u stop making videos ?
@markroymangrobang10723 жыл бұрын
My camera broke. Ill try to upload new vid soon. Thanks for stopping by.
@rajruk85143 жыл бұрын
Please share more videos Thanks but you are jeneas
@Jeremy_Moro2 жыл бұрын
Temperature difference in generators is very bad because it can make parts bigger and if the shell and rotor have too different temperatures then rotor might touch the shell and cause vibration or in the worst case it can explode
@joycethomas88683 жыл бұрын
Get rid of the background music
@markroymangrobang10723 жыл бұрын
Thanks for the feedback sir. I will try next time.
@joycethomas88683 жыл бұрын
@@markroymangrobang1072 good video though. Thanks
@marinesports29704 жыл бұрын
Ya shat ya 😂😂😂
@idavancunha82464 ай бұрын
The third step is subscribe to your channel 😂😂
@lotofforce35443 жыл бұрын
😨👿...maaaan you need to start again from the school!!!... your oscilloscope is clearly showing the same frequency of both machines and you cheking oscilloscope do not understand what you see !!!! This two signals has only different phases!!! (in our case we can say initial phases!!!👿😨
@markroymangrobang10723 жыл бұрын
Hello, can you be more elaborate and specific on which part or time of the video you are talking about?
@muhammadadam47923 жыл бұрын
Nob
@igweprinceokechukwu8772 жыл бұрын
Good job 👍
@bussi78592 жыл бұрын
Crap
@Atom586 Жыл бұрын
hi @markroymangrobang1072 Ifrom freshgrad Electrical, Where can I find experience working on a ship🙏