One key start and stop a secondary control circuit by time relay

Fixed time overcurrent protection principle wiring diagram

Electrical circuit diagramA diagram representing circuit connections with circuit component symbols is called a circuit diagram. The circuit diagram is a kind of principle layout diagram that expresses the composition of each component and the relationship of the device, which is drawn by the symbol of the standardization of physics and electricity for the need of research and engineering planning.

The circuit diagram of the house

Electrical engineering learning reference chartElectrical engineering is divided into five parts: foundation, equipment, power system, application, automation and communication, which are specific for reference.