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Subject: Re: How to stop relay arc

Date: 07/22/00 at 2:33 PM
Posted by: John Dunn - Consultant
E-mail: ambertec@ieee.org
Message Posted:

In Reply to: How to stop relay arc posted by Dave on 07/20/00 at 12:51 PM:

Hi, Dave.

Where relay contacts arc like that (you didn't specify on make or on break) , the usual recommendation is for RC snubber networks. However, the design of those things is more art than science, or so it has always seemed to me.

I suggest you contact the relay manufacturer, explain the situation and see of they have any particular recommendations. If they don't, then from a purely shoot-from-the-hip standpoint, try starting with 100 ohms 2W in series with 0.1 F at 600V minimum connected across the offending contacts.

Good luck.

John Dunn - President
Ambertec, Inc.

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