It is an electrical device designed to initiate the isolation of a part of the electrical installation or to operate an alarm signal, in the event of abnormal condition or a fault. In simple words relay is an electrical device that gives the signal to isolation device (eg: Circuit Breaker) after sensing the fault and helps to isolate the fault system from the healthy electrical system
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Transmission substation transmission substation connects two or more transmission lines Distribution substation distributi... -
Over-current / Earth fault relays are the basic protection relays. Used for protection of transformers and feeders from over current and ...
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Electric Current Electric current definition and calculations. Electric current definition Electric current calculatio...
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Advance - EFFR wire has enhanced flexibility* & higher bending capacity (15% to 20% more bending radius than other wires) comes with uni... -
Series motor cannot be started without load because of high starting torque. Series motor is used in Trains, Crane, etc.
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7.1Transactor 7.2Hedgehog 7.3Variometer and variocoupler 7.4Rotary transformer 7.5Variable differential transformer 7.6Resolver and synchro...
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WTI and OTI of Transformer The WTI means winding temperature Indicator and OTI means Oil Temperature Indicator which indicates the win...
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Joule’s Law of Electric Heating The amount of work required to maintain a current of I amperes through a resistance of R ohm for t second ... -
substation which is used for all voltage levels between 55 KV to 765 KV is called outdoor substation. ... The outdoor substations are mainly...
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synchronous machines have the capability to work on different power factor (or say different imaginary POW varying the field emf. Hence sy...
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