Schneider Electric LV947385 MasterPacT MTZ MN Undervoltage Release 380-480V Air Circuit Breaker Accessory

The Schneider Electric LV947385 is an MN opening undervoltage release for the fixed MasterPacT MTZ1, MTZ2 and MTZ3 Active circuit breakers, supplied for 380-480 V AC 50/60 Hz control voltage. It trips the breaker instantaneously once the supervised voltage drops to 0.35-0.7 Un, giving the connected MasterPacT breaker an undervoltage safety trip and re-closing permission once voltage recovers to 0.85 Un.

Technical Specifications

Selection Notes

The MN release is an undervoltage trip, not an overcurrent protection: it opens the breaker when the supervised voltage falls below the 0.35-0.7 Un threshold and re-closes above 0.85 Un, so it is specified for safety interlocking rather than fault clearing. It fits the fixed-mounting MasterPacT MTZ1, MTZ2 and MTZ3 Active breakers only; the drawout version of the same breakers needs the corresponding drawout-rated release. The 380-480 V AC supply range covers both 50 Hz and 60 Hz installations without a separate part number.