The Schneider Electric LV839252 is an XF communicating closing voltage release — a closing coil — for MasterPact MTZ drawout circuit breakers. It operates on a 380/480 V AC/DC control circuit, drawing 4.5 VA / 4.5 W holding power. The response time varies by frame: 55 ms ±10% for MTZ1, 70 ms ±10% for MTZ2, and 80 ms ±10% for MTZ3. The threshold tripping voltage range is 0.85 to 1.1 Un.
This voltage release mounts in the drawout cradle of a MasterPact MTZ breaker — the drawout mounting mode means it is installed into the breaker's chassis, not hard-wired to the panel. The communicating control type allows the closing coil to receive commands over the breaker's communication network, enabling remote close operations from a PLC or BMS.