I realize this doesn't respond to your question about what you can do in the EU, but if shipping is the whole problem, why not just protect the motor leads and ship the terminal box separately? I once purchased a chiller with an 11kV motor that came from Sweden (I think) without any terminal box...
I'm pretty sure the "I" and "O" are really the number "1" and the number "0"; the number 1 represents "on" and the number 0 represents off.
Regards,
Matt
We made the changes I described earlier (increase trip point, add I^2t), and the motor is starting without incident. We also measured current on the equipment ground at less than 2 amps, for what that's worth, with the motor running.
Thanks for everyones input.
Matt
As it happens, I'm going out there in the morning to look at this. My first position was to be in the "there's something wrong" camp, but I can accept that current sensor saturation may be causing a false trip. Having said that, I'm going out there to see what is really going on. I'm somewhat...
One of my clients has a new installation where an MCC feeder circuit breaker is tripping when a 250 HP vacuum compressor starts. The trip unit indicates that the breaker has tripped on ground fault. The trip unit is a GE MVT+, and is set to trip at 200 amps with a .1s delay (GE Spectra SKH8...
