Earth Leakage Relay

Earth leakage protection measurement for low voltage. Means it detects the earth leakage current and. If any current leaks from any electrical installation there must be any insulation failure in the electrical circuit it must be properly detected and prevented otherwise there may be a high chance of electrical shock if anyone touches the installation an earth leakage circuit breaker does it efficiently.

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An earth leakage circuit breaker elcb is a safety device used in electrical installations with high earth impedance to prevent shock.

Earth leakage relay.

Earth leakage relays are used to sense small magnitude of currents. Toroidal transformers ct1 ctd1. It detects small stray voltages on the metal enclosures of electrical equipment and interrupts the circuit if a dangerous voltage is detected. Earth leakage relay without built in toroidal transformer elr b elr 3c.

Qty add to cart. Manual test button for relay operation checking. The earth leakage current are very low and are sensitive leakage current can be detected by earth leakage relay and core balance current transformer. Earth leakage relays are normally used in low voltage circuits only.

These relays are designed in such a way that whenever they sense a preset value of current usually settable between 10ma and 3a it trips the circuit breaker and interrupts the flow of current. Suitable for direct pulse current and immune to external disturbances. Detection of no connection to zct zero phase current transformer. To be used with elr b elr 3c d30.

Electronic relays with adjustable delay time. Earth leakage circuit breaker or elcb. Elr detects the leakage current in the circuit and isolate the power supply by switching off the tripping device circuit breaker contactor etc. Real time monitoring of leakage current.

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