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Voltage Restrained Over Current Relay 51VR operating principle with Circuit Diagram

3,942 views · Published 28 July 2018 · 5:12 · Indexed 23 October 2026

Channel: Tech Doct · 2018 · Education

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Voltage Restrained Over Current Relay in Tamil. The overcurrent relay is nothing but a relay operates when the current reaches the pickup value. The overcurrent relay is used to protect the alternator or generator against overloading and which trip the circuit breaker. Another important criteria in overcurrent element is protection against short circuit. The short circuit creates heavy fault current through the winding for few milliseconds. At that same time, the voltage starts reducing gradually as the current increases., but in this, condition the over current element cannot sense the fault current. In order to protect the generator winding the voltage restrained over current relays are implemented. The relay sense the generator current and voltage.
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In English: https://www.techdoct.com/relay/voltage-restrained-current-relay-basic-concept-51v-voc/ #relay, #protection, #electrical in tamil, #transformer protection, #generator protection
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