What is a power relay?

The working principle and characteristics of power relay (relay) When the input quantity (such as voltage, current, temperature, etc.) reaches the specified value, the electrical appliance that makes the controlled output circuit turn on or off. It can be divided into electrical quantity (such as current, voltage, frequency, power, etc.) relays and non-electric quantity (such as temperature, pressure, speed, etc.) relays. It has the advantages of fast action, stable work, long service life and small size. It is widely used in power protection, automation, sports, remote control, measurement and communication devices.