Railways Signalling Relays | Shelf type Relays

Railways Signalling Relays | Shelf type Relays

Relays Relay is an electromagnetic device which is used to convey message electrically from one circuit to another circuit through a set of contacts (back or front contacts)and works on the principle of electromagnetism. Relays are classified as : According to source of power applied – DC Relays & AC Relays. According to mounting – […]

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