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How to determine K value for a GE generator

How to determine K value for a GE generator

How to determine K value for a GE generator

(OP)
Hello,
     I am trying to establish the settings for a 32 reverse power relay.  In the manual, it is stated that all of the relay settings are a function of the K value for the generator (maximum permissible heating).  I am dealing with an old generator (1960) and I do not have many of the original documents.  Does anyone know how I might be able to obtain this K value?

thanks

RE: How to determine K value for a GE generator

Hi Eeprom.
32 reverse power protection is used as prime mover protection , not as generator protection.
Could you please check yourself.
Maybe you told about 46 ( NPS, imbalanse, unbalance protection) or about 24 ( V/Hz) protection) or about 49 stator overload protection.
What is size and type of prime mover?
Best Regards.
Slava

RE: How to determine K value for a GE generator

I agree with Slava - the k value is generally associated with rotor heating and negative sequence current, not reverse power.

If this is a GE generator and still has its nameplate, just call GE and give them the serial number.  They will be probably be able to track down the information - eventually.  

The k value can vary quite a bit - from 30 down to maybe 10 for very large machines.  

RE: How to determine K value for a GE generator

(OP)
Oops.  Yes, you are both correct.  I am referring to the 46 relay.  I had both manuals in front of me and I wasn't paying enough attention.  I had figured that I would have call GE if I couldn't find an easier way, such as calculating the constant based on generator data.  So, I guess it is time to call GE.

thanks     

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