What is an electromagnetic relay?

electromagnetic relay is the type of electrical switch controlled by solenoid. The electromagnetic relay is used in various applications, including alarms and sensors, switching signal and detection and checking failures on electric distribution lines. The electromagnetic relay was invented in 1835 and its direct function has not changed much since. Consumers interact with an electromagnetic relay in various forms daily, from timed office lights to test buttons and other quality control devices.

The electromagnetic relay core is naturally an electromagnet created by winding the coil around the iron core. When the coil is under voltage through the current through it, the nucleus is magnetized and attracts the swivel iron anchorage. When the anchor rotates, it operates one or more sets of contacts, which affects the circuit. When the magnetic charge is lost, the fittings and contacts are released. Demagnetization can cause a jumper over the coil and when the damage to other components of the device is shut down. Therefore, the electromagnetic relay usually uses the diode to limit the charge flow, while the cathode connected to the most positive end of the coil.

electromagnetic relays can take three forms. Normally open contacts Connect the circuit when the device is activated and disconnect it when the device is not active, such as a light switch. Normally closed contacts disconnect the circuit when the relay is magnetized, and the change of switching includes one of each contact type. Contact configuration depends on the intended use of the device.

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electromagnetic relay is able to control higher power output than input and, as a result, is often used as a buffer to insulate circuits of different energy potentials. When the low flow is low on an electromagnet, throwing the switch, the device is able to allow a higher current. This is advantageous in some applications such as tripping alarm and other safety devices,Because to activate an application requiring more energy, a safer low current can be used.