Lovato PMV70A600 self-powered multifunction three-phase voltage monitoring relay for 480–600 V AC systems without neutral, providing undervoltage, overvoltage, voltage asymmetry, phase-loss and incorrect phase-sequence protection.
£390.71
The Lovato PMV70A600 is a multifunction three-phase voltage monitoring relay designed to protect industrial electrical systems against abnormal voltage and phase conditions. As part of the Lovato PMV70 monitoring relay series, it combines undervoltage, overvoltage and voltage asymmetry monitoring with phase-loss and incorrect phase-sequence detection for reliable protection of motors and automation equipment.
This self-powered relay continuously supervises a 480–600 V AC three-phase supply without neutral and de-energises its output relay whenever a monitored fault occurs. Adjustable voltage, asymmetry and timing controls allow the protection settings to be tailored to the application, helping reduce equipment damage, costly downtime and unnecessary maintenance.
With adjustable 80–95% undervoltage, 105–115% overvoltage and 5–15% voltage asymmetry thresholds, the PMV70A600 provides comprehensive monitoring from a single compact device. Automatic reset, LED status indication and 35 mm DIN rail mounting make it an excellent choice for industrial control panels, switchboards and OEM machinery.
The Lovato PMV70A600 continuously supervises the incoming three-phase supply and responds whenever undervoltage, overvoltage, phase imbalance or phase sequence faults occur. By disconnecting control circuits before damage develops, it helps extend the service life of motors, drives and industrial equipment.
The adjustable thresholds and configurable timing functions enable the relay to distinguish between brief supply disturbances and genuine electrical faults. This improves system reliability while reducing unnecessary production interruptions.
| Voltage | 600 V |
|---|---|
| Phase | Three Phase |
| Manufacturer | Lovato Electric |
| Series | PMV70 |
| Model | PMV70A600 |
| Product type | Multifunction three-phase voltage monitoring relay |
| Monitored system | Three-phase without neutral |
| Rated control voltage | 480–600 V AC |
| Operating voltage range | 0.7–1.2 × Ue |
| Rated frequency | 50 / 60 Hz ±5% |
| Auxiliary supply | Self-powered |
| Maximum power consumption | 19 VA |
| Maximum power dissipation | 2.5 W |
| Monitoring functions | Minimum voltage, maximum voltage, voltage asymmetry, phase loss and incorrect phase sequence |
| Minimum-voltage set-point | 80–95% of Ue |
| Maximum-voltage set-point | 105–115% of Ue |
| Asymmetry set-point | 5–15% of Ue |
| Tripping delay | 0.1–20 seconds |
| Resetting time | 0.5 seconds |
| Resetting hysteresis | 3% |
| Instantaneous trip threshold | Below 70% of Ue |
| Phase-loss tripping time | 60 ms |
| Repeat accuracy | Better than ±0.1% |
| Reset type | Automatic |
| Relay outputs | 1 |
| Relay operating state | Normally energised, de-energises on trip |
| Contact arrangement | 1 changeover SPDT contact |
| Rated operational contact voltage | 250 V AC |
| Maximum switching voltage | 400 V AC |
| Conventional free-air thermal current | 8 A |
| Electrical life | 100,000 cycles |
| Mechanical life | 30,000,000 cycles |
| Status indication | 1 green LED and 3 red LEDs |
| Terminal type | Screw terminals |
| Maximum terminal tightening torque | 0.8 N·m |
| Conductor size | 0.2–4 mm² |
| Rated insulation voltage | 600 V |
| Rated impulse withstand voltage | 6 kV |
| Power-frequency withstand voltage | 4 kV |
| Operating temperature | -20 to +60 °C |
| Storage temperature | -30 to +80 °C |
| Protection rating | IP40 front, IP20 terminals |
| Mounting type | 35 mm DIN rail |
| Modular width | 2 modules |
| Dimensions (W × H × D) | 35.8 × 104.7 × 64.9 mm |
| Weight | Approximately 130 g |
| HS Code | 85364900 |
The PMV70A600 monitors a three-phase 480–600 V AC supply for undervoltage, overvoltage, voltage asymmetry, phase loss and incorrect phase sequence.
No. The relay is specifically designed for three-phase systems without neutral.
No. The relay is self-powered directly from the monitored three-phase electrical supply.
Yes. The undervoltage threshold is adjustable from 80% to 95% of Ue, the overvoltage threshold from 105% to 115% of Ue and the voltage asymmetry threshold from 5% to 15% of Ue.
Yes. The relay detects both phase loss and incorrect phase sequence, helping prevent reverse motor rotation and equipment damage.
The relay mounts onto a standard 35 mm DIN rail inside electrical control panels, switchboards and industrial machinery.
Lovato multifunction monitoring relays are widely used by panel builders, machine manufacturers and industrial engineers to provide dependable voltage and phase protection in demanding electrical installations.
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LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...