Re: [Amps] Zero Crossing circuit

["Phil Clements" <philk5pc@tyler.net>]

Subject: [Amps] Zero Crossing circuit


> Wondering if anyone has used a zero crossing circuit on a high 
> voltage
> supply to reduce inrush current at startup? would this work for soft 
> start
> or would it just assist?
> Ed N5BLZ
Zero crossing circuits (solid-state relays) are far too fast acting 
for use as a soft-start device, Ed.

A properly designed soft-start circuit has a delay equal to the time 
it takes the H.V. meter to reach 2/3 of the way to its normal reading.

This varies with the size of the filter caps in the P.S. ; c. 1-3 
seconds. Max. delay on a zero-crossing S.S. relay is many times less 
than needed.

(((73)))

Phil, K5PC




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