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ELR series

Monitoring and protection of the low voltage distribution network

Front panel residual current relays are electronic devices used in combination with an external toroidal transformer. The choice of toroidal transformers is made according to the useful diameter and the minimum value of the leakage current to be detected.

The range of ELR front panel residual current relays has been tested in combination with miniature circuit breakers (S200 range) and moulded case circuit breakers (Tmax series up to T5 630 A) conforming with IEC/EN 60947-2 Annex M.

 

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Main benefits

Guaranteed compliance

Compliant with IEC/EN 60947-2 Annex M. The range is tested within a configuration that includes residual current relays, toroids, shunt-trips, MCCBs and MCBs available in ABB offer

Continuous operation

Allows continuity of operations by signaling first in case of leakage current detection for quick interventions

Wide range

Wide range of products, toroids, and features to cover several applications and markets

 

Product details

 

Product range

ELR48P

Type A relay with fail-safe and auto-reset functions.
(48x48 mm)

ELR72

Type A relay with fail-safe and auto-reset functions.
(72x72 mm).
P-Version available with pre-alarm threshold function

ELR96

Type A relay with fail-safe and auto-reset functions.
(96x96 mm).
• P-Version available with pre-alarm threshold function
• PF-Version available with frequency filter function
• PD-Version available with Led display bar indicator

Toroidal Transformers

Toroids allow the detection of earth fault current and are designed to be combined with the ELR series.

 

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