Why Choose the Lovato PMV70A600 Voltage Monitoring Relay?
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.
Key Advantages
- Monitors three-phase 480–600 V AC systems without neutral.
- Detects undervoltage, overvoltage and voltage asymmetry.
- Provides phase-loss and incorrect phase-sequence protection.
- Self-powered operation removes the need for an auxiliary supply.
- Independently adjustable voltage and asymmetry thresholds.
- Adjustable tripping delays minimise nuisance operation.
- Automatic reset restores operation once supply conditions return to normal.
- Compact two-module DIN rail design simplifies installation.
Key Features
- Lovato PMV70 multifunction voltage monitoring relay series.
- 480–600 V AC rated monitoring range.
- Designed for three-phase systems without neutral.
- Minimum and maximum AC voltage monitoring.
- Voltage asymmetry monitoring.
- Phase-loss and incorrect phase-sequence detection.
- 80–95% adjustable undervoltage threshold.
- 105–115% adjustable overvoltage threshold.
- 5–15% adjustable asymmetry threshold.
- 0.1–20 second adjustable tripping delay.
- 0.5 second resetting time.
- Automatic reset with 3% resetting hysteresis.
- One normally energised SPDT relay output rated at 8 A.
- Green power LED and three red fault indication LEDs.
- 35 mm DIN rail mounting with screw terminals.
Reliable Multifunction Three-Phase Protection
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.
Typical Applications
- Three-phase motor protection systems.
- Industrial control panels and switchboards.
- Pumps, fans and compressors.
- Conveyors and material handling equipment.
- Packaging and production machinery.
- HVAC and refrigeration installations.
- Industrial automation systems.
- High-voltage three-phase distribution monitoring.
