Mitsubishi F-1SV-LNDR Handle Lock Device for Circuit Breakers

The Mitsubishi F-1SV-LNDR (F-1SV-LNDR) is a dedicated handle lock device engineered for low-voltage molded case circuit breakers and earth leakage breakers. Designed to enhance operational safety across industrial electrical distribution panels, this locking accessory mounts directly over the circuit breaker toggle handle. It allows maintenance personnel to secure the breaker in the OFF position using standard safety padlocks, effectively preventing inadvertent re-energization during service, inspection, or facility repair. This handle locking mechanism is compatible with Mitsubishi circuit breakers, including select WS-V series and related industrial low-voltage switchgear. By physically restraining handle movement, the F-1SV-LNDR facilitates adherence to strict lockout-tagout (LOTO) protocols in factory automation systems, motor control centers, and commercial power distribution enclosures. Built with durable industrial-grade materials to withstand demanding electrical room environments, the device offers simple, secure mechanical installation without requiring modifications to the breaker enclosure. It delivers a dependable mechanical interlock solution for operators and maintenance technicians working with automated machinery and switchgear systems.