1600amp Square D tripping

[jim dungar]

Yes, there is an EPO switch, but it is in the main fire control room above ground level in

thank you for the clarification. I will discuss this with the electrician when they come on site to adjust. I’m assuming the breaker needs to be in the open position prior to adjustment?

No, but it is advised. The adjustments can be made at anytime, but sometimes the breaker will revert to its lowest pickup points as you move the selector between settings. This can cause an unexpected trip if there is adequate loading on the breaker.