Rental Generator Grounding Potential Rise
Rental Generator Grounding Potential Rise
(OP)
We are renting a 13.8kV/4.16kV Genset. It is not indicated in the original contract which party is responsible to limit the grounding potential rises of all parts of the station ground grid to 5000V and touch and step voltage at the edge, within, and around the generator grounding electrode shall not exceed the tolerable values specified in CEC Table 52.
ETAP simulation shows the GPR exceeds the limit. Can we pass the resonsiblity to Rental genset supplier. Or we can install a rsistivity gravel around the rental genset to limit GPR, the step and touch potentials.
Thanks in advance.
ETAP simulation shows the GPR exceeds the limit. Can we pass the resonsiblity to Rental genset supplier. Or we can install a rsistivity gravel around the rental genset to limit GPR, the step and touch potentials.
Thanks in advance.






RE: Rental Generator Grounding Potential Rise
RE: Rental Generator Grounding Potential Rise
RE: Rental Generator Grounding Potential Rise
"Theory is when you know all and nothing works. Practice is when all works and nobody knows why. In this case we have put together theory and practice: nothing works... and nobody knows why! (Albert Einstein)
RE: Rental Generator Grounding Potential Rise
RE: Rental Generator Grounding Potential Rise
While agreeing with jghrist,I too should ask,
1)Generator is a local source.So how does it cause GPR and touch potentials?
2)Generator line to ground voltage is very much less than the allowable GPR in CEC.Then why are you worried about GPR and touch potentilas?
RE: Rental Generator Grounding Potential Rise
I'm a little confused by 13.8kV/4.16kV Genset.
Should this be 13.8kV/7.97kV or 13.8kV/4.16KVA?
Bill
--------------------
"Why not the best?"
Jimmy Carter
RE: Rental Generator Grounding Potential Rise
RE: Rental Generator Grounding Potential Rise
31 Jul 09 1:47
Which is it?