3 Phases Elevator Lift Spare Parts Voltage Monitoring Relay Contactor CBR RD6-G

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Relay , also known as electric relay, is an electronic control device, which has a control system (also known as input circuit) and a controlled system (also known as output circuit), usually used in automatic control circuits, it is actually An "automatic switch" that uses a smaller current to control a larger current. Therefore, it plays the role of automatic adjuent, safety protection, and conversion circuit in the circuit. The relay coil is represented by a rectangular box symbol in the circuit. If the relay has two coils, draw two parallel rectangular boxes. At the same time, mark the text symbol "J" of the relay in the rectangular box or beside the rectangular box. There are two ways to represent the contacts of the relay: one is to draw them directly on the side of the rectangular box, which is more intuitive.