Standard delivery
£8 ex VAT · free over £200UK parcel delivery is £8 ex VAT, or free on orders over £200 ex VAT.
Heavier items may be charged at a weight-based or pallet rate, shown at checkout.
PMV10A440 – MAN.RELAY AND PHASE SEQUENCE 208/480V
Lovato PMV10A440 self-powered voltage monitoring relay for three-phase systems without neutral, providing phase loss and incorrect phase sequence detection across 208–480 V AC supplies.
£38.05
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.
Technical Specifications
Tick the specs you need, then view products that match.
| Reset Type | Automatic | |
|---|---|---|
| Monitored Supply | Three-phase | |
| Signal / Input Range | 208–480 V AC | |
| Monitoring Function | Three-phase supply | |
| Voltage | 480 V | |
| Phase | Three Phase | |
| Manufacturer | Lovato Electric | |
| Series | PMV10 | |
| Model | PMV10A440 | |
| Product type | Voltage monitoring relay | |
| System type | Three-phase without neutral | |
| Monitoring functions | Phase loss and incorrect phase sequence | |
| Monitored voltage range | 208–480 V AC | |
| Rated frequency | 50/60 Hz | |
| Auxiliary supply | Self-powered | |
| Number of relay outputs | 1 | |
| Reset mode | Automatic | |
| Programming | Fixed operation, no adjustment required | |
| Status indication | LED | |
| Terminal type | Screw terminals | |
| Mounting type | DIN rail | |
| Modular width | 1 DIN module | |
| Front protection rating | IP40 | |
| Terminal protection rating | IP20 | |
| Weight | Approx. 82 g | |
| Compliance | IEC/EN 60255-5, IEC/EN 61000-6-2, IEC/EN 61000-6-3, UL 508, CSA C22.2 No. 14 and IEC/EN 60335-2-89 | |
| HS Code | 85364900 |
Frequently Asked Questions
What is the Lovato PMV10A440 used for?
The PMV10A440 monitors a three-phase AC supply and detects phase loss or incorrect phase sequence before these conditions can affect connected machinery.
What voltage range can the PMV10A440 monitor?
The relay is designed for three-phase supplies ranging from 208 to 480 V AC.
Does the PMV10A440 require a neutral connection?
No. It is specifically designed for three-phase systems without neutral.
Does the relay require a separate auxiliary supply?
No. The PMV10A440 is self-powered directly from the monitored three-phase circuit.
Can the PMV10A440 detect incorrect motor rotation?
It detects incorrect phase sequence, allowing the control circuit to prevent a motor from starting with the wrong direction of rotation.
How is the PMV10A440 installed?
The relay mounts on a standard DIN rail inside an electrical control panel and connects to the three monitored phases using screw terminals.
Trusted Monitoring for Industrial Control Systems
Lovato Electric monitoring relays are used by panel builders, machine manufacturers and automation engineers to identify abnormal electrical conditions and improve the protection and reliability of three-phase equipment.
