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Re: DC relays .Purpose of the diode
Posted to Technical Theory Forum on 8/6/2018

G'day Louis, I recently repaired my swimming pool chlorinator, it is more or less a 30 amp 6 volt battery charger, the problem with it was the "pump fail" warning circuit board, the main relay (12v DC) on that board has a capacitor across the pull in winding. Login to read more.