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Protection

Protection

Protection

(OP)
Hi Guys,
I have been given a protection single line diagram for a
induction generator which will be connected to local utility.
The actual situation is that there are two induction generators but the diagram has only one, so I have to develop a new one with two, So my question is
Q #1 Should I just copy and paste same protection with the second paralled generator . If a fault occurs in one, is  there any coordination required that the other will be stopped alos.
I dont wanna just give wrong information with my less knowledge of protection.
thanks

RE: Protection

You'll need to know the motor characteristics of the new generator.  You just can't assume you can copy the settings, as most likely, they will be different.

Mike

RE: Protection

(OP)

Both generators are similar I think they had an impression that it is gonna be one generator, so they did not put the second one,  from the diagram I see they have only two relays
SEL 551 and 547, I looked at the websites and I am also wondering, when we talk about bus protection that is a part of switch gear protection, in my case will these two relays take care of bus protection or we have to have a seperate bus protection.
Thanks

RE: Protection

I still go back to my original response.  As to your second question, I think the answer is "it depends".  It depends on your switchgear/bus setup, and the level of backup/reliability you want.

Mike

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