ELRM44V-30 Type A Earth Leakage Relay

Type A – Earth Leakage Relay
Selectable Trip level (0.03 – 30A) and Time delay (0 – 10s)
Local (and optional remote) Test/Reset buttons
Isolated Auxiliary supply
1 x SPDT/1 x SPNO Relay outputs
44mm wide, DIN Rail mount

This product is used in conjunction with an external Core Balance Current Transformer (CBCT) and will detect residual sinusoidal alternating and pulsating direct currents. An adjustable trip level and time delay allows the product to be set according to the type of installation to be protected. When the level of leakage current being monitored exceeds the set trip level, the unit will trip. Typically, the product is used in conjunction with an external switching device (i.e. contactor, shunt trip). An auxiliary supply is required to power this product.

RS Components Farnell Get a quote Technical Advice

Monitoring function: Earth leakage
Trip level: 0.03 – 30A
Time delay: 0 – 10s
Output: 1 x SPDT 8A (S.O.) / 1 x SPNO 6A (P.S.O.) @ 250V (AC1)
Dimensions (mm): W:44 x H:85 x D:63.5

Aux. supply voltage options*:
12-125VDC (Order Code: 99-1014)
115/230VAC (Order Code: 99-1007)
400VAC (Order Code: 99-1015)

The 24VAC option is no longer available. Please refer to the multi-voltage ELR30PN.

* To be specified when ordering

Please note that this product requires an external toroid (CBCT) that should be also specified when ordering. Click here to view toroid options.

Distributors	Stock Code	Link
RS Components	5119121 (115/230VAC)	Go to product
RS Components	1883546 (12-125VDC)	Go to product
Farnell	1853734 (115/230VAC)	Go to product
Farnell	4825112 (12-125VDC)	Go to product

Typical applications include:

LV switchboards
Industrial control panels
Building services distribution
Plant room electrical panels

Key benefits:

Helps detect earth leakage — Type A residual-current monitoring can operate the relay output when leakage exceeds the 0.03 – 30A 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 — Local and optional remote Test/Reset functions support commissioning and fault response.
Allows coordinated settings — The adjustable 0.03 – 30A trip and 0 – 10s delay allow selection to suit the protected installation.