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Old 12-03-2003, 03:04 PM
Steve Stadelman Steve Stadelman is offline
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I have an answer, the best element life comes with very short (less than a second) switching.

An S.S.R. that swithes every second will not cycle the element temperatures up and down like a mercury relay, so the elements run at a more constant temp and do not get so "shocked".

A burst fired variable time base S.C.R. is your first choice, S.S.R. second, Phase angle S.C.R. third, mechanical or merc relay fourth. The first three give good performance.
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