11-25-2021, 01:45 AM
if you want many lamp protected together use one fuse. you can connect one relay output with breaker with all these lamps. "varistor" is use for protect overvoltage, not for overload, usually will not overvoltage, just sometime mistake connect with 3 phase line. so the important is protect for overload, maybe one channel have connected with too much load, so the current will be large, wire become hot. this protect by breaker or fuse. only after relay circuit can protect. i don't know what's means of before relay?