I'm an electronics hobbyist and I decided to make my own electric heater/kiln thingy. It works fine for a couple of minutes, but then the breaker trips. This is my first project involving AC, so I'm a bit clueless as to what could be happening here.
The circuit is very simple:
- I have a coil of wire that is switched on/off by a SSR which is controlled by a PID controller.
The PID and the heater coil each have their respective fuses.
I'm run it off a wall outlet and since I live in Canada, it operates at at 120V AC 60 Hz.
- I have it grounded to the heatsink of the SSR, which is housed close to all the other wiring, but definitely not touching.
Edit: I hope I didn't botch this circuit drawing, but here it is.
- The breaker cannot be tripping from over-current because the fuses are never blown,
and the wire itself can only handle a maximum of 5 amps before melting.(I think the breaker trips at 10 or 15 amps).
- Is it possible that the coil is generating a voltage spike that is arcing over to ground? Like how in DC, the voltage builds up as the field collapses.
- If 2. is a possibility, how would prevent that from happening? Like how in DC you would have a fly back diode.
That's all I could think of, and honestly I don't know what to look up so I decided to ask here before turning it back on again.
PS: I decided not to draw a circuit because I don't know what the exact values would be for all of the components. I'm hoping that the circuit is simple enough to understand from the description in words. I can attempt to go calculate everything if it's really necessary, just hope I don't have to haha.