UPS Power Supply System

The YH-DL series power-specific UPS, bypass voltage stabilization cabinet, and feeder cabinet are power supply products designed by Yinhua Company specifically for the development needs of China's electric power industry, tailored for power plants, substations, and distribution rooms. They feature dual-conversion online operation with zero-transfer function. They are mainly used for power telecontrol, RTU power line carrier, power monitoring, etc. When the mains supply is normal, single-phase 220V (or three-phase 380V) is isolated, rectified, and filtered, then provides a stable power supply to the load through the inverter. If the AC grid input is abnormal or interrupted, the backup DC panel of the power system supplies power through the inverter via a reverse-blocking diode. When the DC panel is under-voltage or loses power, the static switch transfers to bypass power supply. When the mains supply returns to normal, it automatically switches back to mains inverter power supply. If the inverter is overloaded or malfunctions, it transfers to bypass power supply and simultaneously issues a warning signal.