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Regular Contributor

Re: G3520C SUDDEN LOAD ZERO

yes appening many different reading, and ecm go in crisis

Contributor

Re: G3520C SUDDEN LOAD ZERO

Hello.

 

we have 6 engines like yours, at first we have similars ploblem, and the failure was in the signal of methane, the level reported to the engine was not the same that we read in the panel.

 

regards

New member
Employee

Re: G3520C SUDDEN LOAD ZERO

It is very difficult to diagnose an issue of this magnitude on a community forum.  Let me assure you that this is a VERY SERIOUS event and immediate action should be taken.

 

First, before any further operation, this unit needs to have the protective relay settings checked and the operation of the breaker shunting must be completed.

 

Let me explain this further.  The generator can go to zero load which is abnormal but does occur if a load is removed or a distribution breaker is opened.  It is not however expected that a reverse kW or kVA event would stay online since this unit is from your description being paralleled with another energy provider (gens or utility).  If protective devices are either not set correctly or not function, this could result in catastrophic damage to the equipment or physical harm to operators and technicians.

 

I would also recommend that  you contact the local dealer to begin an investigation using ET triggers to record data points as they may be able to assist in determining root cause.  Even if an outside event such as a loose wire or irregular speed input has caused this or a faulty gas feed, they should be able to see some effect to the engine and possibly assist in the analysis.  A Dealer Support Network (DSN) ticket might also help but the generator protective settings are the responsibility of the coordination study provider (typically a consulting engineer).

 

Please consider not operating this unit until you can ensure safe operation.

Visitor

Re: G3520C SUDDEN LOAD ZERO

DEAR SIR,

                   LOCAL DEALER DID NOT FIND ANYTHING.WE CHECK GSOV CIRCUIT.ECM SOME TIME CUT OFF ITS POWER SUPPLY AND ENG DROPPED THE LOAD AND AFTER SOME SECOND AGAIN RESTORED THE SUPPLY.ONLY DETONATION ALARM APPEAR.WE HAVE 03 G3520C AND THIS PROBLEM SAME ON ALL THREE. PLEASE HELP US. 

 

REGARDS

 

FARAZ AHMED

Cat Dealer
Dealer

Re: G3520C SUDDEN LOAD ZERO

Have you got any kind of three synchronous motors there???if yes then please check your load circuit.because this could mess up with your generator..also make sure you got your fuel and speed fully tuned..

 

cheers

Trusted Contributor
Employee

Re: G3520C SUDDEN LOAD ZERO

Faraz if you have not already done so please contact your local dealer for assistance with this issue.

 

You can find you local dealer contact information via this link: http://www.cat.com/dealer-locator

--woody // Caterpillar Power Generation Moderator
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New member

Re: G3520C SUDDEN LOAD ZERO

Dear Mr. Faraz,

 

Please provide more details to gladys@ictrgroup.com...... we need a quantity of 10 for our stock here in Dubai UAE.

Thank you & looking forward to here from you.

 

Regards,

ICTR Group

Visitor

G3520C SUDDEN LOAD ZERO

WE HAVE 03 CAT G3520.OUR NO.03 GEN-SET SUDDEN LOAD DROPPED AND OPERATING AT REVERSE POWER.BUT AMAZING IS THAT NO ENG BREAKER TRIPPED & NO CODE GENERATED.ULTIMATELY EMG STOP.

 

THING THAT HAPPEND

 

1-   RUNNING LOAD  1400KW  DROPPED TO NEGATIVE WITHIN SECOND & NEXT SECOND AGAIN RECOVER THE LOAD.

 

2-  ENG RPM AND HZ SAME TIME CHANGE. BUT THROTTLE & FMV MAX POSITION WHEN LOAD DROPPED.

 

WE CHECK FUEL CIRCUIT WIRING NOTHING FOUND WRONG

 

 

REGARDS

 

FARAZ