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wanfauzan... Two additional questions: 1) Ambient conditions where units are located? 2) Can you produce view of engine-speed signal-pulses for several operating conditions: a) Isolated. b) Paralleled. c) Synch'd with Grid. Phil Corso

wanfauzan... Please provide Engine and Generator Data Sets. Phil Corso

wanfauzan... How old are the units and when were hey last serviced? Phil Corso

Marat... I'm not questioning the reason you are providing calculations using wire parameters! In my opinion meeting safety requirements the onus is on the mfg providing the 'component' installed in the IS area! Phil Corso

Marat... is the installation in America? Phil Corso

Marat... The "Similar Thread" reference shown below, dated Nov 25, 2021, had a reply ! Was it insufficient for your needs? Regards, Phil Corso

fsx.. I was able to find the procedure more quickly than I thought ! Note: the attachment is a 2-parter because it was a not an induction motor, but instead a synchronous motor ! Regards, Phil Corso

fsx.. The curves are necessary, but you lack other information, such as: a) Inertia of motor ! b) Inertia of compressor ! c) Gear box Ratio ! If you are interested I will provide you with an example of the procedure to use... Regards, Phil Corso

dinindukodi... The Damper-Winding should be connected circumferentially by wire or a shorting ring-bar! Regards, Phil Corso

dinindukodi So far you have only provided 'words' ! If at all possible, please send: 1) Photo of original machine's Nameplate. 2) Original machine's Factory Test Document. 3) Rewind Shop's Test Document. 4) Test document following re-installation. Regards, Phil Corso

Dinindukodi... My presumption was incorrect. The problem I encountered happened to a Non-Salient-Pole machine! Therefore, it isn't related to your situation. The mistake I saw was the company's workers made a serious error in placement of the rotor after it was lifted off a train's flat-car...

dinindukodi... The following presumes your generator's rotor is the non-salient-pole version ! 1) What is MW rating, rated voltage, and frequency of the generator? 2) Am I correct by stating vibration test carried out at rewinder shop was OK? 3) Could you determine if the rotor...

joseph4blues... Since Synch-Scan-Protocol has to do with constraints used during synchronization, when was the auto-synchronizer last tested? Regards, Phil Corso

joseph4blues and others... I will give the answer(s) to what was asked earlier, but only if asked with a real name... on this forum or by contacting me at... [email protected] ! Regards, Phil Corso

Frank... So, machine is handling about 35 kW heater load, plus 40 kW chiller and other load and all's OK. Problem starts when heater load increased ! 1) How old is unit? 2) What do you mean by "cannot maintain 480 V"? 3) Is voltage fluctuating? 3) Does Engine speed change? 4) Any noises in...

"Phil Corso, that's the single most intelligent thing I've seen you write." Comes from the heart !

joseph4blues... All though you pleaded for help, I don't understand why you haven't participated ! In my experience there are two unique problems associated with paralleling combustion engine-driven generators. a) The first is unheard of with, say, turbine-driven alternators. The fact is that...

joseph4blues... My last question... does the problem only occur with the same 2 gensets ? Regards, Phil Corso

joseph4blues... My 2nd question... is synchronization being done automatically or manually ? Regards, Phil Corso

joseph4blues... Paraphrasing CSA... Is this a new problem associated with a facility that's been in operation for a while? Or is it relatively new? Regards, Phil Corso