Schneider Electric LV847382 MasterPact MTZ MN Undervoltage Release 100-130V Air Circuit Breaker Accessory

The Schneider Electric LV847382 is an MN instantaneous undervoltage release for fixed MasterPact MTZ1, MTZ2, and MTZ3 air circuit breakers, supplied for 100-130 V AC 50/60 Hz or 100-130 V DC control circuits. It opens the breaker automatically once the supervised voltage falls to 0.35-0.7 Un, then re-closes the circuit once voltage recovers to 0.85 Un.

Technical Specifications

Selection Notes

Pick the LV847382 when the circuit being supervised runs at 100-130 V AC or DC; the same MN release is also offered in 200-250 V and 380-480 V bands for higher control voltages, so matching this rating to the actual supply keeps the release from tripping immediately or never tripping at all. It only fits fixed-mounted MTZ1, MTZ2, and MTZ3 breakers, not drawout versions. Response time is 45 ms on MTZ1 and 95 ms on MTZ2/MTZ3, so coordinate it with upstream relay timing when it is used as a safety interlock rather than a simple undervoltage trip.