PMV20A575 - PHASE SEQUENCE/PHASE LOSS MODULAR RELAY

Why Choose the PMV20A575?

The Lovato PMV20A575 voltage monitoring relay protects three‑phase systems without neutral by detecting phase loss and incorrect phase sequence across 208...575 VAC at 50/60 Hz. Self powered from the monitored supply, this PMV20 series device provides a single relay output for reliable fault signalling. Ideal for industrial control panels and machinery, PMV20A575 helps ensure correct motor rotation and supply integrity during commissioning and ongoing operation.

Engineered for durability, it offers 3,000,000 mechanical cycles, 6 kV impulse withstand and an operating temperature range of −20 to +60 °C. Terminals accept up to 0.8 Nm tightening torque, with 8 A Ith under IEC. Conformity includes IEC/EN 60255‑5, IEC/EN 61000‑6‑2/‑6‑3, UL 508 and CSA C22.2 n° 14, supporting global panels. At just 120 g, PMV20A575 integrates easily into new builds and retrofit applications.

Key Benefits

• Wide 208–575 VAC monitoring range covers varied three‑phase supplies.
• Detects phase loss and incorrect phase sequence for equipment protection.
• Self powered from monitored line, no separate auxiliary supply required.
• Single relay output simplifies fault signalling to control circuits.
• 6 kV impulse withstand enhances resilience against transient overvoltages.
• Operates from −20 to +60 °C for demanding site conditions.
• Long mechanical life rated at 3,000,000 cycles for reliability.
• Conforms to IEC/EN, UL 508 and CSA standards for compliance.

Technical Specification

• Product type designation: PMV20
• Ith (IEC): 8 A
• Mechanical life: 3000000 cycles
• Terminal tightening torque (max): 0.8 Nm
• Rated impulse withstand voltage Uimp: 6 kV
• Operating temperature: -20 to +60 °C
• Storage temperature: -30 to +80 °C
• Weight: 120 g

What’s Included

• Lovato PMV20A575 voltage monitoring relay
• Manufacturer datasheet (PDF)
• Basic installation and safety information

Applications

• Motor rotation checks and protection against incorrect phase sequence
• Monitoring phase loss in industrial control panels and MCCs
• Safeguarding pumps, compressors and conveyors on three‑phase supplies
• HVAC and refrigeration plant using three‑phase systems without neutral
• General three‑phase supply supervision in switchboards and distribution

Safety note: Installation and commissioning should be performed by qualified personnel. Isolate the supply before wiring, tighten terminals to a maximum of 0.8 Nm, and operate within the specified voltage and temperature limits.