Sir your videos are amazing.. Never learnt all these subjects in a better manner before. Please upload more topics and benefit the students. Thanks and regards
@kalyanasundaramsrinivasan2612
2 ай бұрын
Dear Sir, Thanks a lot for all your videos sir! You may have departed this earth, but your videos continue to impart us the correct knowledge.
@LifEoFaSaiLor2022
5 жыл бұрын
first time in life i got to know about this clearly.....otherwise i was round little knowledge of reverse power...thnx sir
@fuzailalam8830
2 жыл бұрын
crystal clear expertise from your end. This is how colleges should TEACH. There are no bad marine engineers just Poor Teachers !!!
@Samaritan555
4 жыл бұрын
Simple and clear explanation. All my earlier misunderstanding of the alternator reverse power relay stands corrected. With clear understanding of the operational behaviour of a system one can approach his work more confidently.
@HIMT
4 жыл бұрын
Thanks for appreciation. We are doing online classes daily on both Engineering and Nautical topics. Please visit www.himtmarine.com for online schedule and topics.
@akshayshahi8491
2 жыл бұрын
hey jenise, so does that mean that during motoring effect, the generator keeps on running in the same direction and does not change the direction of rotation?
@babusuganthan9592
3 жыл бұрын
Thank a lot sir for giving a clear instructions and learnt lot from your knowledge and your videos are so helpful to gain my knowledge and clearing my doubts. U are great sir, salute you sir
@zuhairhussain6258
3 жыл бұрын
Respect from Pakistan such a calm And logical teacher!
@HIMANSHU-zj1zj
9 күн бұрын
great sir..very much informative thanks a lot
@15mitra
5 жыл бұрын
I've never seen a best explanation than this.. Thanku.
@themyth8654
5 жыл бұрын
Same here
@MarineEngineerOfficer....
6 жыл бұрын
very nice illustration with different scenarios .....................................thanking you sirrr
@ashankanishkadayarathna2821
3 жыл бұрын
Explanation superb thank you very much sir.1st time today its clearly understand in my life🎉️🎉️🎉️👍.
@raveen9821
4 жыл бұрын
Excellent explaination sir! Very helpful!
@mc7685
5 жыл бұрын
The professor knows how to explain things very succinctly.
@legendsaid888
7 ай бұрын
All the explanation was on point, I only have one doubt that why do we need to go till negative 10% Of rated load to open the breaker and stop the generator why can't we open the breaker at 0kw in case the fuel is reduced to Zero in any trip?
@RPSV
2 жыл бұрын
Got lot of concept from this, thank you so much sir
@TheJayakumar22
6 жыл бұрын
EXCELLENT LECTURE SIR. CONTINUE THIS
@themyth8654
5 жыл бұрын
U r just phenomenal.... All this while I had it all wrong😂😂 U might change the way how Indians view marine electrical
@minoodeboo
3 жыл бұрын
Very good and practical explanation, Thank you Sir
@KAFKUBA
Ай бұрын
Professor, I'm hearing that we have a generator in the field that delivers real power properly but is not able to control or deliver reactive power... I'm told it's reverse reactive power...is this possible?
@shibusadashivan8251
3 жыл бұрын
Thank u sir ....I had a better understanding of this topic now
@aligoharmughal4952
3 жыл бұрын
I am more than happy to be able to attain ur class " Sir V.R. Venkatesan" from across the border. Your classes build my confidence and knowledge. HIMT, You are doing a wonderful job of benefiting people around the globe with hard-gained knowledge and years of experience of your intellect teachers. Huge respect for them all. 🤍
@naseevkaushal6278
2 жыл бұрын
J8 no words ur knowledge is excellent
@andrewhardcastle7982
6 жыл бұрын
Thank you , I now have a much better understanding of rpp
@taljeetsingh1226
Жыл бұрын
thankx for explanation
@manikandanselvakumar7320
5 жыл бұрын
thank you sir. explanation was very clear.
@guruvananthamguru5074
3 жыл бұрын
Hi bro im eto course student plzs one help me sir
@waqashabib1674
4 жыл бұрын
Useful information..
@user-og1xw6br3b
3 ай бұрын
How its true to avoid alternator become a load during negative (-) Kw..?
@sivarajanradhakrishnan6410
6 жыл бұрын
Sir., So That means if reverse power trip happens then only the problem is power produced by one gen is consumed by other?? No physical or other damage to gen??
@vrvenkatesan5825
6 жыл бұрын
Reverse power happens when the prime mover's developed power falls below the idle power. It will happen when for any reason the fuel supply is cut off or drastically reduced. If there is nothing wrong with the engine , but the fuel filter clogs, the power can go to reverse. This situation will not result in any damage (perhaps running for long periods can damage the fuel pump). If the fuel reduction was due to a safety function,( such as low lub oil pressure), the power will go to reverse. In such case unless the breaker is opened quickly, the engine is going to run and will get damaged severely. It is not the reverse power per se that is causing the damage. It is inability of the engine to stop under failed lub oil condition that will destroy the bearings and crank shaft
@akashpaul5237
Ай бұрын
Sir how to test reverse power
@keszmar
3 жыл бұрын
It is very useful, Thank you sir.
@selcukizer7283
2 жыл бұрын
During reverse power situation, there is also an high chanse of overspeeding of engine if fuel racks of of fuel injection pumps are wrongly adjusted. Make sure whilst the engine goes to stop all of them stays at 0 mm.
@RumashaSewwandi
3 ай бұрын
how can it be overspeed? when the reversed power is supplied at the same frequency..
@NitinPratapSinghMariner
6 жыл бұрын
Thank you so much sir, very greatful for such endeavour
@sundhukumar
2 жыл бұрын
RIP ,,,,Deep condolences
@siddhuwin2706
5 жыл бұрын
Awesome sir very good explanation😉😉
@cavedriller
5 жыл бұрын
Sir, thanks for the wonderful explanation. I am confused as to the reason for maintaining constant speed even after the engine fuel is cut off. Wouldn't there be as speed drop as the alternator is running more like an induction motor? It would be nice if you could clear my doubt.
@vrvenkatesan5825
5 жыл бұрын
The alternator runs as a synchronous motor not as an induction motor. So it will continue to run at synchronous speed.
@Naren_oceanlove
4 жыл бұрын
Veary helpful sir..🙏thanku sir 😊🙏
@ragulprasanth3576
5 жыл бұрын
Sry for delay comment ..sir Plz explain what difference between low forward power and reverse active power..at what reason when they two will work??.am more confused plz explain
@vrvenkatesan5825
5 жыл бұрын
Reverse power is when the prime mover generates less than the idling power, due to reduction of fuel. Low forward? power only means when the kw load on the alternator is low . The intention is to simulate a fault condition such as Lub oil failure and check whether the engine will shut down.
@shafiullah8128
5 жыл бұрын
Love you from pakistan dear sir
@aungkyawoo7088
4 жыл бұрын
Thank you very much, Sir!
@pradeepbiet
4 жыл бұрын
Top class explanation sir. Thank you so much if u hav a video series of electrical teachings i would like to buy for study.
@vrvenkatesan5825
4 жыл бұрын
Thanks for your interest. We are in the process of developing more videos and in a series. Meanwhile I am writing a series in the Marine Engineer's review .
@pradeepbiet
4 жыл бұрын
@@vrvenkatesan5825 sir can i get your articles if possible please share the link or mail paddyinline@gmail.com
@HIMT
4 жыл бұрын
Thanks for appreciation. We are doing online classes daily on both Engineering and Nautical topics. Please visit www.himtmarine.com for online schedule and topics.
@jitu2089
2 жыл бұрын
Sir, if alternator side having 500 kw load.what would be load on engine side.
@satyarout9377
6 жыл бұрын
which types of relays ,how many types of relays,how many no.of ct&pt are used to protect the generator to reverse power protection
@LouKhobor
5 жыл бұрын
Mechanism of reverse power relay is not explained.Please explained with current coil,voltage coile and non magnetic aluminium plate
@vrvenkatesan5825
5 жыл бұрын
Explanation is given in any standard marine electricity book .
@kkkk172
5 жыл бұрын
wonderful explanation sir. while motoring the generator runs as a synchronous motor, its speed will be much more than engine's rated speed. so while testing the reverse power relay function, aren't we putting generator at risk as far as speed is concerned?
@vrvenkatesan5825
5 жыл бұрын
During reverse power condition, the motoring alternator and the other alternator will still run at the same frequency (speed) . There is no danger of over speeding. During motoring as when we test, the fuel from the prime mover is reduced and the reverse power drawn will only compensate for this. Even if the fuel is completely stopped , the alternator (and the engine) will continue to keep rotating, with the reverse power overcoming the resistance. Why should there be any over speeding? Overspeeding can happen only if the fuel to the engine is not reduced and the alternator also turns into a motor . This cannot happen.
@kkkk172
5 жыл бұрын
thank you for the reply sir. @@vrvenkatesan5825
@sreekanthkunni2227
2 жыл бұрын
best video
@mediaforsociety2541
6 жыл бұрын
Super Explanation
@jitu2089
2 жыл бұрын
Aux engine runs @ MCR or NCR.plz reply sir.
@dannyperry8070
3 жыл бұрын
Assuming a generator paralleled with grid. If the AVR voltage is set to the grid voltage and later Should the grid voltage increase above the generator voltage setting, will there be reverse power?
@vrvenkatesan5825
3 жыл бұрын
Reverse power is related to KW. Alternator turns to motor only when the KW of the prime move drops. Voltage differences will result in changes in reactive power. Please watch the video on AVR droop in same chaneel
@MADDY596
6 жыл бұрын
INFORMATIVE !
@sagarxmen00
4 жыл бұрын
What could be the possible reasons of reverse power generation in a generator ? And ways rectify this?
@vrvenkatesan5825
4 жыл бұрын
The mechanical power developed by the prime mover has to reduce to a level below the idling power. Fuel to an engine or steam flow to a turbine reduces below the idling level. In such case the power will reverse
@sagarxmen00
4 жыл бұрын
@@vrvenkatesan5825 thank you sir.
@mangeshjoshi400
4 жыл бұрын
Sir what is the exact location of reverse power relay
@kaushik1168
3 жыл бұрын
Between alternator and busbar
@mohammadabdullah4996
6 жыл бұрын
very nice
@renissaravi8373
3 жыл бұрын
How thermal generator turbine works
@MohanRaj-iw9si
5 жыл бұрын
Thn wat will this motoring effect cause any danger to alternator part like diodes.... Or this is only for stopping the engine..during parallel operations.can u explain sir..
@vrvenkatesan5825
5 жыл бұрын
KW generated by the alternator has to come from the engine which has to produce the mechanical power . When a single alternator is running and is on load if fuel is cut off, (either by stop switch or due to a safety shut down) the engine will stop. ( there will be a blackout). When an alternator is running in parallel , any attempt to stop the engine will fail if the circuit breaker is still connected, as the power to keep rotating will be drawn from the busbar. If the reason for stoppage is a serious engine fault such as LO press failure the engine cannot be saved even of the LO press trip works. Thus to save your engine apart from stopping fuel the breaker has to be opened. That is done through the reverse power relay. The excitation circuit creates a magnetic field to maintain the required EMF so that the terminal voltage is maintained. As the KW on the alternator increases, the field current has to increase. When the alternator is without load, field current will be minimum.' When the alternator is running as a motor, the EMF is less than the terminal voltage, so the field current will be less than the No load condition. In such case how can the excitation circuit get overloaded? There is no risk of damage to those components.
@vrvenkatesan5825
5 жыл бұрын
It is for stopping the engine during parallel operation. If an engine runs alone, stopping fuel will stop the engine. If it is connected to another engine , either mechanically (with gears) or electromagnetically ( an in alternators) stopping fuel alone will not work. You need to disconnect the engine.
@vigorian2846
2 жыл бұрын
is there any students from HIMT currently studying in either 3rd or 4th year (B.Tech)or just passed ?
@HIMT
2 жыл бұрын
Yes, we have B.Tech Marine Engineering Cadets in their 3rd & 4th Years and also passed out Cadets. You can reach our team at college@himtcollege.com
@vishalsahlot
2 жыл бұрын
Rip VRV Sir
@rajagopal-vt1oc
6 жыл бұрын
why don't we keep setting 0 for reverse power?
@vrvenkatesan5825
6 жыл бұрын
Very low or zero reverse power setting will result in unwanted tripping while trying to synchronise the generator to bus bar
@merchantlifeon..3644
2 жыл бұрын
99
@satyarout9377
6 жыл бұрын
I can't understand clearly sir
@vrvenkatesan5825
6 жыл бұрын
Any particular doubt?
@user-we6hg7zr6p
2 жыл бұрын
Please speak french or arabe or written english your speak
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