things New Member Aug 6, 2008 #21 I too have seen that vid heaps, I believe it was a problem in shutting off the main supply. One flaw I instantly noticed is that the contacts slowly move away from each other, it was stretching the arc to begin with. Stupid design really.
I too have seen that vid heaps, I believe it was a problem in shutting off the main supply. One flaw I instantly noticed is that the contacts slowly move away from each other, it was stretching the arc to begin with. Stupid design really.
RODALCO Well-Known Member Aug 15, 2008 #22 That type of switch is an ABS ( Air break Switch ) isolator. These switches are not designed to be switched under load conditions. A small arc and crackle does usually occur. In this case I think that one of the OCB or VCB contacts failed to open properly and a current was still flowing, hence the huge arc.
That type of switch is an ABS ( Air break Switch ) isolator. These switches are not designed to be switched under load conditions. A small arc and crackle does usually occur. In this case I think that one of the OCB or VCB contacts failed to open properly and a current was still flowing, hence the huge arc.