The difference between the contactor and the relay, the symbols in the circuit
Contactor is the master, the equivalent of the switch, in the circuit connected or cut off the main circuit, the symbol is generally: C
Relay is the auxiliary control, for the control circuit, it has a lot of types, the common symbol: J, subdivided down, there are intermediate relay: ZJ
Time relay: SJ, thermal relay: RJ, and so on.
Low-voltage electrical control of a class of books, choose a look.
His common points are small signal control large signal, symbols are K and KM
Different points of the relay for low-power signal control and signal isolation, such as solenoid valves and so on
Contactor for high power and high load signal control of three - phase motor
Contactor is the master, the equivalent of the switch, in the circuit connected or cut off the main circuit, the symbol is generally: C
Relay is the auxiliary control, for the control circuit, it has a lot of types, the common symbol: J, subdivided down, there are intermediate relay: ZJ
Time relay: SJ, thermal relay: RJ, and so on.
