Symbol recognition of commonly used relays

Update:29-03-2019
Summary:

Relays are used in all kinds of circuits. Relays are no […]

Relays are used in all kinds of circuits. Relays are no stranger to our lives, but the use of relays may make us a little helpless, because there are many types of relays, and there are many types of relays.
Commonly used relays:
1. According to the principle of operation: electromagnetic type, induction type, electric type, transistor type relay.
2. According to the measured parameters: current type, voltage type, power type, impedance type and other power relays, as well as temperature type, pressure type and other non-electric satin appliances.
3. According to the function: intermediate relay, time relay and signal relay.
Common relay new and old symbols:
Current relay, old symbol: (LJ); new symbol (KA).
Voltage relay, old symbol: (YJ); new symbol (KV).
Time relay, old symbol: (SJ); new symbol (KT).
Intermediate relay, old symbol: (ZJ); new symbol (KM).
Signal relay, old symbol: (XJ); new symbol (KS).
Differential relay, old symbol: (CJ); new symbol (KD).
Gas relay, old symbol: (WSJ); new symbol (KG).
The symbol recognition content of common single-phase relay is here. Currently, the commonly used relays only have the above. It is necessary to pay attention to the fact that automotive relays are classified and can be classified into functional and control types.