Differential Protection Relay

Differential Protection Relay measures the line current of each phase from each of the winding's of the transformer. The relay is used for protection of power transformer against hazardous internal faults. It provides stability against magnetic inrush conditions, Load/through fault stability is achieved through bias setting provided in the relay. It operates only for internal faults.

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Detailed Description for Differential Protection Relay

A relay is an electrically operated switch. Many relays use an electromagnet to mechanically operate a switch, but other operating principles are also used, such as solid-state relays. Relays are used where it is necessary to control a circuit by a low-power signal, or where several circuits must be controlled by one signal.



·         Easy to install

·         Easy to maintain

·         Affordable

·         Digital Ammeters for differential and through current.

·         Built in time interval meter stop/start (DIgital).

·         Phantom fault with continualy variable auto transformer and curreent limiter

·         Built in power on Indicator trip status indicator.

·         Excellent functionality

·         Optimum performance Heat resistance

·         Dimensional accuracy

·         Durability



·         Two winding power transformers

·         Auto transformers

·         Biased differential protection for generators.



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