On Wed, 30 Oct 2002, Jinx wrote:

*>I probably have this figured out right, but just checking
*>
*>There are two relays to control a motor. An SPST for power
*>and a DPDT for direction. I've found the relays I want, based
*>partly on physical size. The SPST is 8A continuous and the
*>DPDT is 2A continuous but are close in size and low profile
*>(important). The motor draws 0.4A when running. If the direction
*>(2A) relay is closed before the power (8A) relay, then the power
*>relay will take the brunt of the start-up surge ??

Yes if you allow enough time between them. Same thing applies when
breaking (open the big relay first). Using a hefty snubber should help,
and using a NTC or other current limiter even more.

Peter

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