ABB S2-H10KL Circuit Breaker

ABB S2-H10KL is an auxiliary contact accessory for the ABB S2-H10 miniature circuit breaker, providing a single normally open contact (1NO) that closes as the main breaker moves to the ON position. This signaling contact is used in control circuits to indicate breaker state, enabling simple interlocking, remote status indicators, and logic in automation panels without carrying main circuit power. The S2-H10KL kit is designed to pair with the S2-H10 family, ensuring compact integration in existing ABB installations and other S2-H series enclosures. With its isolated auxiliary pathway, it helps protect control circuits from the power side while delivering reliable feedback for sequencing, permissive logic, and safety interlocks in motor control centers, switchgear, and control cabinets. Typical applications include equipment that requires explicit status feedback to programmable logic controllers or HMI systems, such as startup sequencing, interlock safety circuits, and remote monitoring of breaker position. The accessory's 1NO configuration and ABB engineering ensure compatibility within the S2-H10 ecosystem, supporting straightforward expansion of control logic without modifying the primary protective function of the breaker.