Earth Leakage Relays

Products

How to choose Earth Leakage Relays

Earth Leakage Relays currently includes 19 listed products. Use the product specifications to narrow the selection to your application.

Frequently asked questions

What are Earth Leakage Relays and where are they used?

Earth leakage relays work with an external toroidal current transformer to measure the residual current on a line and trip a moulded case circuit breaker or contactor, or raise an alarm, when the set threshold is exceeded. Unlike residual current circuit breakers they do not interrupt the line themselves; they provide selective protection in high-current supply and distribution panels with adjustable sensitivity (30 mA – 30 A) and time delay.

What should I compare when choosing Earth Leakage Relays?

Choose by sensitivity and delay range, supply voltage, reset type (manual/automatic) and compatible toroid diameter.

What should Earth Leakage Relays not be confused with and how do they differ from similar products?

Unlike residual current circuit breakers they do not interrupt the line themselves; they provide selective protection in high-current supply and distribution panels with adjustable sensitivity (30 mA – 30 A) and time delay.

What Is a Residual Current Device? Types and Selection