The LV839265 is a Schneider Electric MN diagnostic undervoltage release for MasterPact MTZ drawout circuit breakers. The signalling function reports coil-powered error and MN-open status, so the control system knows the release state. Control voltage is 24 V AC at 50/60 Hz or 24...30 V DC. The undervoltage release trips between 0.35 and 0.7 Un on opening and closes at 0.85 Un. Holding power draw is 4.5 VA / 4.5 W. Response time is 40 ms ±5% for MasterPact MTZ1, and 90 ms ±5% for MTZ2 and MTZ3 frames. The communicating control type means it integrates with the breaker's digital communication bus for status and diagnostics.
Schneider Electric has classified the LV839265 as obsolete.
Deployment context
This release mounts in the drawout cradle of a MasterPact MTZ air circuit breaker. The drawout form factor means the release can be swapped without removing the breaker from the switchgear — useful for panel maintenance and fault isolation in industrial power distribution.