What is Electromagnetic Attraction Type Relay?
Electromagnetic Attraction Type Relay is the most simple in construction as well as its working principle. These types of electromagnetic relays can be utilized as either magnitude relays or ratio relays. These relays are employed as auxiliary relays, control relays, over-current, under-current, over-voltage, under-voltage, and impedance measuring relays.
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| Electromagnetic Relay |
Hinged armature and plunger-type constructions are most commonly used for these types of electromagnetic relays. Among these two constructional designs, the hinged armature type is more commonly used.
This relay is essentially a simple electromagnetic coil and a hinged plunger. Whenever the coil becomes energized the plunger is attracted toward the core of the coil. Some NO-NC (Normally Open and Normally Closed) contacts are so arranged mechanically with this plunger, that, NO contacts become closed and NC contacts become open at the end of the plunger movement. Normally attraction armature type relay is DC operated relay. The contacts are so arranged, that, after the relay is operated, the contacts cannot return to their original positions even after the armature is de-energized. After relay operation, these types of electromagnetic relays are reset manually.
Attraction armature relays by their construction and the working principle are
Attraction armature relays by their construction and the working principle are
instantaneousin operation.
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| Electromagnetic Attraction Type Relay |