PLC在低压开关设备备用电源自投装置中的应用

Application of PLC with Automatic of Throw-in Equipment Emergeney Power Supply in Low Voltage Switchgear

以电站"无人值班,少人值守"为设计原则,选取S7-300系列PLC装置,配置各种功能模块,将PLC技术应用到0.4 kV开关设备的备自投中。以两路进线电源的应用场合为例,详细介绍了备自投方案的逻辑图、原理图以及基本配置和实现过程。结果表明,设计具有功能完善,可靠性高,检修、维护方便,操作简单、直观等特点。

Basing on no watchkeeper or few ones on duty,the was applied to 0.4 kV switchgear by the technology of PLC.the S7-300 series PLC devices was selected,including a variety of functional modules.Taking an example of two electrical wirings to the switchgear,the logic diagrams and schematics,as well as the configuration and achievement of the device were described in detail.The practice shows that the design is functional,high reliability and it is convenient to repair and maintain,moreover,the operation is simple.