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May 12, 2014 at 13:26 vote accept becjasl
May 1, 2014 at 16:15 answer added Spehro 'speff' Pefhany timeline score: 1
May 1, 2014 at 16:14 comment added becjasl Always relay 1. Once in a while it is relay 1, 1A, 2 and 2A. Relay 3 and 4 have an additional 1000uf cap so they remain energized longer and never open with load on their contacts. By catastrophic I means it melts down and emits a lot of black soot / smoke in the enclosure. I would say the contact melt apart, is the best way to describe it (versus weld shut)
May 1, 2014 at 16:00 comment added Spehro 'speff' Pefhany Which relays are failing? What do you mean by "catastrophic"? Welded 'on'?
May 1, 2014 at 15:27 history asked becjasl CC BY-SA 3.0