ABB 291B935A09 Directional Ground Relay Type CWC

ABB 291B935A09 Directional Ground Relay Type CWC is a Westinghouse/ABB CWC-directional relay used for directional earth-fault protection in distribution equipment. The unit is documented in listings as a two-pole, normally open device configured for a current operation range around 0.5–2 A, with some catalog references indicating a broader 0.25–4 A range. It is a 60 Hz device that typically consumes about 0.25–4 W of power during operation, and some marketplace listings note a no-cover variant of the CWC relay. As part of the CWC family, it provides directional protection for ground faults and is commonly encountered in legacy or retrofit protection schemes where a directional ground fault element is required. This model is referenced in multiple catalogs and reseller listings under the Westinghouse ABB line, confirming its identity as the 291B935A09 CWC directional relay.