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<blockquote data-quote="ludo" data-source="post: 92831" data-attributes="member: 691"><p>Ja. I'm probably being too difficult and thinking too little. Looks like 3ms for a little one and 10ms for a big one without special precautions. </p><p></p><p>In the circuit Gert put up, it seems like a +/-50V offset will trigger the IC in 30ms or so (negative) or in 115ms (positive). (But it may take longer too, depending on the chip's threshold level either way and whether I understand the datasheet correctly :<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" />) Just over 1V offset will also trigger the IC but that will take much longer. Looks like about 20 seconds either way. So relay operating time is probably a non-issue.</p><p></p><p></p><p></p><p>I mean the RC snubber goes across the contacts, not the coil. The coil gets a reverse diode. The RC is a spark suppressor to keep things from arcing if the power goes off.</p></blockquote><p></p>
[QUOTE="ludo, post: 92831, member: 691"] Ja. I'm probably being too difficult and thinking too little. Looks like 3ms for a little one and 10ms for a big one without special precautions. In the circuit Gert put up, it seems like a +/-50V offset will trigger the IC in 30ms or so (negative) or in 115ms (positive). (But it may take longer too, depending on the chip's threshold level either way and whether I understand the datasheet correctly ::)) Just over 1V offset will also trigger the IC but that will take much longer. Looks like about 20 seconds either way. So relay operating time is probably a non-issue. I mean the RC snubber goes across the contacts, not the coil. The coil gets a reverse diode. The RC is a spark suppressor to keep things from arcing if the power goes off. [/QUOTE]
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