3 The 220V system of power plant consists of the DC motor, UPS inverter, emergency DC lighting, control power supply of power distribution device, relay and the power plant annunciator system.

• 3电厂220V系统系统范围包括直流电动机、不间断电源逆变器、事故直流照明、配电装置的控制电源、继电器、电厂声光报警系统。