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eddy_boy
Active Contributor

Join Date: Oct 2010
Posts: 15

reverse power shutdown alarm

10/20/2010 8:00 PM

hi

i have all 5 perkins gensets 456kw / 570 kva per genset. from 2days im getting in my 1 unit some reverse power alarm, morning i start unit 1, unit 2, unit 5, its ok but after 1 hour im getting in unit 1, reverse power alarm, i have already check all CT its good voltage its also good 380 on load. Kw im getting up down i check that why Kw is getting up & down and i got rpm sometime its 1800 sometime 1797 sometime 1792 and if drop its come 1791 or 1790 and then that alarm comes reverse power alarm... do any1 knows about this fixing how to fix this problem is there governor problem let me tell u that in my genset i have all electrical governor plssssssss helppppppppp..... how to fix plsssssssss reply

Regards Thanks....
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Tornado
Guru
Technical Fields - Technical Writing - New Member Engineering Fields - Piping Design Engineering - New Member

Join Date: May 2009
Location: Richland, WA, USA
Posts: 21017
Good Answers: 795
#1

Re: reverse power shutdown alarm

10/20/2010 11:55 PM

Possible fuel problem? Check filters, pumps, air leaks into pump suction piping? Does the rpm drop during high load conditions?

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mountk2
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Join Date: Jun 2010
Posts: 348
Good Answers: 10
#2

Re: reverse power shutdown alarm

10/21/2010 1:27 AM

Reverse power is not a alarm. The units are programmed to TRIP under reverse power conditions.

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ramvinod
Guru

Join Date: Jun 2007
Location: chennai,India
Posts: 592
Good Answers: 19
#3

Re: reverse power shutdown alarm

10/21/2010 10:54 PM

The unit 1 is not maintaining its speed.The speed drops and it is motoring therefore the Reverse power relay is picking up.

Please check the following

1) Fuel supply erratic

2)Governor not responding

3) Speed Controller not responding.

Please run the unit independently and observe the operation to identify the faults.

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 Ramesh,Freelance Electrical/automation Consultant
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eddy_boy
Active Contributor

Join Date: Oct 2010
Posts: 15
#4
In reply to #3

Re: reverse power shutdown alarm

10/24/2010 9:20 PM

hi n thnx for replying Mr; Ram Vinod.

yes i got tht governor respond sometime and somtime rpm its going down. do u pls help i have electronic governor is there any way to adjust rpm from governor my rpm is 1800 if i run is going 1800 but after some 15 min its coming 1795,1790 n i m getting reverse power alarm how to fixed this rpm problem pls reply...

thanks ..... regards
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ramvinod
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Join Date: Jun 2007
Location: chennai,India
Posts: 592
Good Answers: 19
#5
In reply to #4

Re: reverse power shutdown alarm

10/24/2010 11:35 PM

Dear sir

Please do not try to change any settings on the Governor.

Please let us know the behavior of the set when you run the set singly (independently).

When you try this method you should deactivate the controller and observe the speed variation.

If the speed variation is observed when you run independently then the problem will be with the governor or fuel system.

If there is no speed variation on single running then activate the controller and observe speed variation if speed variation found then there may be problem with controller .

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eddy_boy
Active Contributor

Join Date: Oct 2010
Posts: 15
#6
In reply to #5

Re: reverse power shutdown alarm

05/12/2011 4:13 AM

thanks Mr ramvinod.

i start my unit single independently i run it for 2 hour n test there is no speed variation where is the prob now pls help me out, before two days i start unit1 & unit3 together its work nice there is no any reverse power alarm but yesterday i found the same i start unit1 & unit3 together and after 6 hour i get same alarm like b4 im getting reverse power alarm & then after half n hour i try start unit1 with unit4 & unit5 same alarm get in 5min then i decrease volt its if i start its going 387/388 then i set it on 384 voltage now unit1 is running single on 250 kw load but there"s no alarm or not any speed variation pls help me wht is the solution how to solve this problem plsssss

Regards & thank you very much....

edwin...
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ramvinod
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Join Date: Jun 2007
Location: chennai,India
Posts: 592
Good Answers: 19
#7
In reply to #6

Re: reverse power shutdown alarm

05/12/2011 4:47 AM

Is it new installation? If the systems are in operation for quite some time how long these systems were working with out problem.

It looks to me that there is no problem or speed variation in the sets when the sets are running independently (not in parallel).

If the above statement is correct then there may be some problems like settings fine tuning with the controllers provided for parallel operation and load sharing.

Can you inform the make and type of controller.

It would be better to get service technician of controller and the get the controllers fine tuned properly for your application.

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 Ramesh,Freelance Electrical/automation Consultant
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eddy_boy
Active Contributor

Join Date: Oct 2010
Posts: 15
#8
In reply to #3

Re: reverse power shutdown alarm

10/15/2011 5:11 PM

hi Mr Ramvinod...

Hope ur fine.. Thnxxx a ton sir ji for ur suggestion u suggest me for my reverse prob its already finish but now in another generator im facing another problem if im starting my genset its run in full speed but in 2 second its stop whats the prob n hw i solve plssssss suggest sir ji i check all feul pump feul is good i m thinking there is some current cutoff problem when i start it run in full speed but at time genset show rpm its getting stop... plsssssssssss help me out sir

Regards&Thankssssss again.....
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eddy_boy (3); mountk2 (1); ramvinod (3); Tornado (1)

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