HAd a 480/277 3000 amp switchboard last night that had the GFPE, Blown Fuse Trip and, UV relay disabled.
They were having random tripping and called the factory for service, guy took the wiring apart, did not fix it and took the customers drawings.
We had to repair and get the system operational. My drawings did not match what was there and I was not sure what to heck the tech had moved around.
Several conductors were left off, phase failure had the line connections reversed (relay had UV and phase reversal)
Frustrating evening, LEAVE THE DRAWING