Saturday morning I encountered a 32A/100mA 4 pole 3 phase EDIT non maintained active RCBO.
Not seen one before. It is installed as part of a portable generator inlet to a building. Builders hired the single phase genset and connecting cable to do some building work where the mains feed required isolating/moving and DNO attending.
Symptom... flip the lever over and push the green button, red marker in window goes black and buildings lights come on. Release green button and it trips/doesn't hold and building goes dark.
Hire company called out and declared their kit correct.
At this point I had given the reason but I'll leave it for a day or so for some thoughts/suggestions.
Not seen one before. It is installed as part of a portable generator inlet to a building. Builders hired the single phase genset and connecting cable to do some building work where the mains feed required isolating/moving and DNO attending.
Symptom... flip the lever over and push the green button, red marker in window goes black and buildings lights come on. Release green button and it trips/doesn't hold and building goes dark.
Hire company called out and declared their kit correct.
At this point I had given the reason but I'll leave it for a day or so for some thoughts/suggestions.
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