Ground fault 4000 amp GE power Break 1, Manual type

[Fordean]

Had a call on a 4000 amp Main breaker. It has tripped 2 times. This past tuesday. and 6 months ago.
Happened at 200 am, They company employees Tried to Reset breaker. But after charge, Would not close, And remained open. And 3 attempts 2 hr later,
It finally reset.
I viewed the screen on the Microversa Trip plus trip unit. And it looks to have a error code displayed, .23 I believe GF code, Which is ground fault. Any input,

They want to remove this breaker. And replaced.

GE TP4040TR Power break 1 type.
4000 amp CT Chip in Micro switch
Microversa Trip plus trip unit

 

[ron]

Did the display look like this?

The image is from page 40 of 49 in this pdf link https://www.npeinc.com/manuals/General Electric/Low Voltage/GEH 6273D Microversatrip Plus and PM Trip Units.pdf



They may be better to see if they can track down whether a GF is actually happening before replacing the breaker,

 

[Fordean]

Did the display look like this?

The image is from page 40 of 49 in this pdf link https://www.npeinc.com/manuals/General Electric/Low Voltage/GEH 6273D Microversatrip Plus and PM Trip Units.pdf

View attachment 2574258

They may be better to see if they can track down whether a GF is actually happening before replacing the breaker,

Yes trying to upload

 

[jim dungar]

I had a similar call from an insurance company headquarters.
The GF setting of the main had never been coordinated with downstream branch breakers. When set to minimum it would trip before a 30A branch breaker. So this was the first thing we 'adjusted' followed by field testing, before replacing the breaker.

The GF was eventually traced to a new set of duct heaters, when enough banks were on the system faulted, when only one or two banks were on things ran fine.