Discuss Indicator lamp connected across contactor coils in the Commercial Electrical Advice area at ElectriciansForums.net
Someone once told me this is bad practice but I cant remember why. Could anyone remind me?
Thanks
i believe he is on about an old practice of fitting a small indicator lamp across the coil as a resistive suppressor ....
I'd not heard of that method before, I've always used diodes across DC coils.
My reply is slightly biased as ive just done a 1 indicator with multiple tasks i.e. solid light, slow pulse and fast pulse to notify machine stop saved loads in space and materials.Totally unsure why. I'd suggest a better practice would be for the contactor to switch a supply to an indicator to confrm the contactor has switched. I dislike using a PLC to switch an indicator lamp unless its part of a light-stack unit to inform Ops.
My reply is slightly biased as ive just done a 1 indicator with multiple tasks i.e. solid light, slow pulse and fast pulse to notify machine stop saved loads in space and materials.
Reply to Indicator lamp connected across contactor coils in the Commercial Electrical Advice area at ElectriciansForums.net
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