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Controller board fried on a MCE unit yesterday, any tips for troubleshooting those power surges?

I was working on a MCE elevator controller in a 12-story building downtown yesterday and the main board just went up in smoke after a power flicker. The surge suppressor looked fine but something still got through and cooked the relays. Anyone else dealt with this and found a good way to protect the boards besides just adding another surge protector?
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2 Comments
wood.john
wood.john16d ago
Wow, silent MOV failure? That's a nasty surprise waiting to happen.
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taylor305
taylor30516d ago
Check the MOVs on the board, they probably failed silently before the surge hit.
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