GFPE Breaker VS LSIG?

[theophilus88]

I have a project with a 4000A Main at 480/277V. I know that the NEC requires the main breaker to have Ground Fault Protection (GFPE Breaker) for a system of this type. I was looking at our submittals, and I saw an LSIG breaker on the main instead. Would an LSIG breaker take the place of a GFPE in this scenario? or would I still need to provide a GFPE breaker? Thanks in advance for any help!

 

[ATSman]

The letters LSIG define the type of protection that the trip unit provides in the breaker:
L = Long Time Delay
S = Short Time Delay
I = Instantaneous Delay
G = Ground Fault
All of these are shown and explained on the Time Current Curves (TCC) for each breaker.
GFPE is another way of stating that the breaker provides Ground Fault Protection.
So the answers to your 2 questions are Yes and No.

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[xptpcrewx]

I have a project with a 4000A Main at 480/277V. I know that the NEC requires the main breaker to have Ground Fault Protection (GFPE Breaker) for a system of this type. I was looking at our submittals, and I saw an LSIG breaker on the main instead. Would an LSIG breaker take the place of a GFPE in this scenario? or would I still need to provide a GFPE breaker? Thanks in advance for any help!

GFPE is an integral part of a LSIG breaker so it isn’t either or.