In normal mains

In normal mains, electricity surge through absorption filter circuit → AC switch DC circuit AC circuit → → DC converter and convert the AC output supply load, and at the same time charging the battery; Once microprocessor control circuit detected mains interruption, → immediately convert DC three phase online ups discharge and converts alternating current circuit → AC output supply load. If UPS microprocessor control circuit detects a fault, then UPS will jump to borrow from the relay (RELAY) bypass (BYPASS), mains power supply load, and audible warning the user.