The Schneider LV848693 is a front face shutter (VIVC) and locking block assembly for MasterPact MTZ3 drawout circuit breakers. It is a safety accessory that physically blocks access to the breaker's primary disconnects when the cassette is racked out, and it provides a positive lock on the chassis to prevent unintended re-racking. This specific variant is configured for 3-pole (3P) drawout chassis rated up to 6300 A. The shutter mechanism is interlocked with the breaker position; when the breaker is in the disconnected/test position, the shutter covers the power stabs. The locking block then secures the breaker in that position, which is essential for lockout/tagout (LOTO) procedures during maintenance on the downstream circuit.
Integration note for the panel
As a drawout accessory, the LV848693 mounts to the chassis (cassette) frame, not to the breaker itself. The shutter position indication is mechanical and visible through the front escutcheon. The locking block accepts standard padlock hasps for LOTO compliance.