A relay is an electromagnetic switch used to switch High Voltage or Current using low power circuits. For example, we can use it for controlling home appliances with a normal low voltage electronic circuit. Electromagnetic relays uses an electromagnet to operate a switching mechanism mechanically.
These rating indicate how much power can be switched through the relays. This does not necessarily tell you what the limits of the relay are. For instance, a 5 Amp relay rated at 125VAC can also switch 2.5 Amps at 250VAC.Similarly, a 5 Amp relay rated at 24VDC can switch 2.5 Amps at 48VDC, or even 10 Amps at 12VDC.
Electromagnetic Relay Definition: Electromagnetic relays are those relay which operates on the principle of electromagnetic attraction. It is a type of a magnetic switch which uses the magnet for creating a magnetic field. The magnetic field then uses for opening and closing the switch and for performing the mechanical operation.
Because of the smaller, less massive contacts and the different actuating mechanism, a reed relay can switch about 10 times faster than an electromechanical relay with equivalent ratings. The reed relays’s mechanical lifetime is also much higher than an electromechanical relay.
Home » Electrical ponents » Active ponents » Values And Principles Of Electromagnetic Relay. Values And Principles Of Electromagnetic Relay. ... and contact rating often 5A at up to 24VDC. Timer relays Usually these specify a coil voltage of 12VDC, 24VDC, 24VAC, 125VAC, or 230VAC. ... related Values And Principles Of Electromagnetic Relay.
Usually an electromagnetic relay has two circuits, low voltage control circuit and high voltage working circuit.The low voltage control circuit includes an electromagnetic relay coil, a low voltage power supply and a switch. The high voltage working circuit includes a high voltage power supply, a motor and the contacts of the electromagnetic relay.
Control Relays & Contactors study guide by bobbi_warner includes 33 questions covering vocabulary, terms and more. Quizlet flashcards, activities and games help you improve your grades.