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Old 12-03-2003, 04:43 PM
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Randy Kaltenbach Randy Kaltenbach is offline
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Originally posted by steve stadelman
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.
OK, so short cycles = minimal temp variation of the elements = longer life.

Honestly, this is one reason I love glasswork so much more than many other artforms. I'm both an artsie and a techie at heart (done my time as a professional engineer). Gotta love it!
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