Relay to drive 1500watt load

Thread Starter

shan90

Joined Dec 28, 2013
5
Could somebody help me selecting a 6Vrelay to drive 1500watt load. I mean the ratings for the relay that must be used??
Actually I have designed a thermostat circuit to which I have connected a 1500watt heater. As i switched on the thermostat, and as it switched off the heater first, the heater coil started fluctuating and burned out. The relay I used was simple electronic relay used in low power circuits
 

inwo

Joined Nov 7, 2013
2,419
It could burn out the thermostat heater!

But then that would really be wrong. Using a thermostat with a heat anticipator to switch a 6 amp load.:eek:
 

Alec_t

Joined Sep 17, 2013
14,280
What is the "heater coil"? Is this part of a fan motor, or a solenoid valve, or .....?
Clearly the relay load is at least partly inductive, so the relay will need to be rated accordingly for switching such a load.
You mention a "simple electronic relay". Is that an SSR?
 

Ragwire

Joined Dec 9, 2013
36
Is the 6V coil voltage AC or DC?
You could probably use a garden variety 2 pole contactor for a central air condensing unit as long as the ratings are OK. You would still need something like a 40VA, 24VAC output transformer to generate the contactor coil voltage and a smaller, 6V (AC or DC, as needed) coil relay just rated to switch the 24 VAC to the contactor coil.
 
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