PMV50NA440 - PROTECTION RELAY 3P+N 380/440V MULTIFUNCTION

Why Choose the PMV50NA440?

The Lovato PMV50NA440 is a voltage monitoring relay for three‑phase systems operating at 380…440VAC, 50/60Hz. It monitors minimum and maximum AC voltage and detects phase loss, neutral loss and incorrect phase sequence on systems with or without neutral. Self powered and simple to configure via potentiometers, it provides two relay outputs for signalling or control.

Designed for reliable performance, the PMV50N-designation unit offers a 6 kV impulse withstand and a mechanical life of 30,000,000 cycles. It operates from -20 to +60 °C and conforms to IEC/EN 60255-5, 61000-6-2 and 61000-6-3. With terminal tightening up to 0.8 Nm, installation is practical for demanding control panels.

Key Benefits

• Monitors minimum and maximum AC voltage on three-phase networks.
• Detects phase loss, neutral loss and incorrect phase sequence.
• Operates with or without a system neutral connection.
• Self powered design simplifies wiring and setup.
• Two relay outputs for flexible signalling and control.
• Simple configuration using front-panel potentiometers for ease.
• Wide operating temperature range from -20 to +60 °C.
• 6 kV impulse withstand enhances electrical robustness.

Technical Specification

• Product type designation: PMV50N
• Ith (IEC): 8 A
• Mechanical life: 30000000 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: 200 g

What’s Included

• Lovato PMV50NA440 voltage monitoring relay
• Installation and setup guide
• Product datasheet (PDF)

Applications

• Protection and supervision of three-phase distribution and control panels
• Monitoring supply quality in industrial machinery and OEM equipment
• Detection of incorrect phase sequence during installation and maintenance
• Safeguarding pumps, compressors and HVAC across three-phase supplies
• Supervising voltage thresholds in automation and process control

Safety note: Install and commission only by qualified personnel. Isolate power before wiring, observe the 380…440VAC operating range, and tighten terminals to a maximum of 0.8 Nm in line with applicable IEC/EN standards.