31 Jul
2006
31 Jul
'06
10:47 a.m.
One thing you should know about zero crossing. You
don't want to use
a zero cross relay on a highly inductuve load( the IMSAI might qualify
as highly inductive because of the large core used ). You want a peak
switching. Zero cross is the worst place to turn on an inductive load
and results in the highest current surge. This may even saturate the
core and cause a peak several times the normal running current.
That's just wrong.
A loaded transformer isn't an inductive load, it's mostly the same type
of load as what is loading the secondary.
Zero crossing is the best place to turn on nearly any load, it may not
be the best place to turn off some loads but for on it is usually best.
If you turn on an inductive load at the zero crossing zero current will
flow. There will be no surge.
Unless there is a serious fault, and even then it is unlikely, you won't
saturate the core of a transformer regardless of how you switch it on.
Lee.