Hello peeps,
Problem I have is for Emergency Lighting.
I need a circuit that turns on one supply when another is turned off -
When mains supply fails, circuit sends 12vdc from battery to emergency lights (turns off when supply resumes)
I know how to do this with a simple relay, but the relay would be energised for months at a time.
I'm worried about coil and contact reliability, the coil overheating and generally drawing current when not in use.
I'm looking for an electronic relay (thyristor?) which switches on when the supply is off.
12vdc is always available for control circuitry. Reliability, low temp and low current draw will be important.
I have to pass this idea by my boss so must be cheap and not likely to short or overheat.
Cheers guys and gals
Problem I have is for Emergency Lighting.
I need a circuit that turns on one supply when another is turned off -
When mains supply fails, circuit sends 12vdc from battery to emergency lights (turns off when supply resumes)
I know how to do this with a simple relay, but the relay would be energised for months at a time.
I'm worried about coil and contact reliability, the coil overheating and generally drawing current when not in use.
I'm looking for an electronic relay (thyristor?) which switches on when the supply is off.
12vdc is always available for control circuitry. Reliability, low temp and low current draw will be important.
I have to pass this idea by my boss so must be cheap and not likely to short or overheat.
Cheers guys and gals