 relays
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Dr. Dark Current
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Registered Member #152
Joined: Sun Feb 12 2006, 03:36PM
Location: Czech Rep.
Posts: 3384
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What about putting a capacitor in parallel to the switch? I think that should work to kill the arc.
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Steve Conner
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Registered Member #30
Joined: Fri Feb 03 2006, 10:52AM
Location: Glasgow, Scotland
Posts: 6706
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Yes, but sometimes the capacitor needs to be so big to kill the arc, that it welds the contacts together the next time you close the switch.
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radiotech
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Registered Member #2463
Joined: Wed Nov 11 2009, 03:49AM
Location:
Posts: 1546
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100 ohms in series with 0.05 ufd makes a good contact snubber. Resistor prevents contact weld. The use of "freewheeling" diodes across relay coils makes them release slowly by retarding flux build-down. This may be an issue with contact arcing.
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