In our design used TRIAC to control the load, As per the product field test setup i should short the neutral and earth connect together also the digital GND is connected with chassis.
The input AC power for TRIAC taken from the UPS (the power used for control circuit through DC power supply), when I load the TRIAC 500 watts my input power from UPS going for TRIP, due to the earth leakage current settings.
my questions are:
- Can I connect the AC INPUT power from raw GRID (without UPS) to LOAD the TRIAC? , Is it will affect or increase the earth leakage current or any damage will accrue?
- If I use isolation transformer to isolate the neutral and phase and secondary neutral and earth tie together, Is it will help ?
- Any alternate method will work out?