Why Choose the Lovato PMV10A440 Voltage Monitoring Relay?
The Lovato PMV10A440 is a compact three-phase voltage monitoring relay designed to detect phase loss and incorrect phase sequence in electrical systems operating without a neutral conductor. As part of the dependable Lovato Electric PMV10 monitoring relay range, it provides straightforward protection for motors, pumps, machinery and industrial control systems.
Designed for a wide monitored voltage range of 208–480 V AC, the PMV10A440 is suitable for many common three-phase industrial supply voltages. The relay is self-powered directly from the monitored circuit, removing the need for a separate auxiliary control supply and simplifying panel wiring.
The PMV10A440 continuously checks that all three phases are present and connected in the correct sequence. If a phase is lost or the phase order is incorrect, its relay output changes state so that a contactor, alarm or control system can respond before machinery is operated under unsafe conditions.
Key Advantages
- Reliable phase loss and phase sequence monitoring.
- Designed for three-phase systems without neutral.
- Wide 208–480 V AC monitored voltage range.
- Self-powered operation eliminates a separate auxiliary supply.
- Helps prevent incorrect motor rotation and phase-loss damage.
- Single relay output for alarms, interlocks or contactor control.
- Compact DIN rail format for industrial control panels.
Key Features
- Lovato Electric PMV10 series.
- Three-phase voltage monitoring relay.
- Phase loss detection.
- Incorrect phase sequence detection.
- 208–480 V AC monitored voltage.
- 50/60 Hz operating frequency.
- Designed for systems without a neutral connection.
- Self-powered from the monitored three-phase supply.
- 1 relay output.
- Automatic operation without adjustment controls.
- LED status indication.
- Screw terminal connections.
- Standard DIN rail mounting.
Reliable Phase Monitoring for Three-Phase Equipment
Three-phase motors and machinery depend on all supply phases being present and connected in the correct order. A missing phase can cause excessive current, overheating and reduced motor torque, while an incorrect phase sequence can make motors and pumps rotate in the wrong direction.
The Lovato PMV10A440 monitors these conditions continuously. When an unsuitable supply condition is detected, its relay output can interrupt the control circuit, prevent equipment starting or activate a warning signal, helping protect valuable machinery and improve system reliability.
Typical Applications
- Three-phase motor control circuits.
- Pump and compressor protection.
- Conveyor and material handling systems.
- Industrial machinery and production equipment.
- Heating, ventilation and air-conditioning systems.
- Electrical control panels and switchboards.
- Phase sequence checking before equipment start-up.
- Alarm and safety interlocking circuits.
