LELRF-0100 Type A Earth Leakage Relay

Type A – Earth Leakage Relay
Compact dimensions – 17.5mm wide (DIN Rail mount)
True RMS
Fixed Trip level (100mA) and Time delay (0s)
Combined Test and Reset button
1 x SPDT Relay output

This product is used in conjunction with an external Core Balance Current Transformer (CBCT) and will detect residual sinusoidal alternating and pulsating direct currents. It is offered with a fixed trip level and instantaneous tripping. Typically, the product is used in conjunction with an external switching device (i.e. contactor, shunt trip). The relay is normally de-energised and energises on trip.
An auxiliary supply is required to power the product.

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Monitoring function: Earth leakage
Trip level: 100mA
Time delay: 0s (instantaneous)
Aux. supply voltage: 230VAC (Order Code: 99-1211)
Output: 1 x SPDT 7A @ 250V (AC1)
Dimensions(mm): W:17.5 x H:89 x D:66.5

Please note that this product requires an external toroid (CBCT) that should be also specified when ordering. Click here to view toroid options. Recommended sizes based on 100mA trip sensitivity are: 35mm, 50mm, 70mm and 120mm.

Typical applications include:

Space-limited control panels
OEM machinery
Building services distribution
Industrial equipment panels

Key benefits:

Helps detect earth leakage — Type A residual-current monitoring can operate the relay output when leakage exceeds the 100mA trip threshold.
Enables a control response — The relay output can be used with an appropriately specified contactor or shunt-trip device when a fault is detected.
Supports commissioning checks — The combined Test/Reset control provides a local check and reset point.
Saves panel space — The 17.5mm DIN rail format fits narrow control-panel spaces.