Traditional Culture Encyclopedia - Traditional virtues - Five ordinary relays
Five ordinary relays
1. electromagnetic relay: the current passes through the coil to generate a magnetic field, which makes the moving contact switch the circuit state. Device for control motors, light and heating elements.
2. Solid-state relay: there are no mechanical moving parts, and the circuit is switched by semiconductor devices. It has the advantages of high speed, low noise and long service life.
3. Time relay: the control circuit realizes the function of delayed closing or opening. It is used to control the motor starting process as a function of time.
4. Intermediate relay: The structure is the same as that of contactor, and it can replace small contactor when the load capacity is small.
5. Protection relay: protect circuits and equipment to avoid damage to the system due to abnormal overload, overcurrent or undervoltage.
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