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Railways Signalling Relays | Shelf type Relays Relays Relay is an electromagnetic device which is used to convey messages 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 the source of power applied – DC […]
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Railway Signalling Relay and Circuits nomenclature Presentation Equipment Identity Consistency should be maintained for nomenclature marking or labeling on the equipment in circuit diagrams. Terminals of an item of apparatus should be uniquely identified. Terminal numbers/letters should appear as suffixes to the equipment code. A position code may be given for identifying the location of the […]
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