PMV55A440 - 1 PHASE LINE VOLTAGE CONTROL RELAY PMV55

Why Choose the PMV55A440?

Designed for dependable supply protection, the Lovato PMV55A440 voltage monitoring relay safeguards single-phase systems across 380...575 VAC at 50/60 Hz. Monitoring both minimum and maximum AC voltage, it delivers timely switching via 1 relay output. The unit is self powered and set up using potentiometers for quick threshold adjustment. Ideal for control panels and OEM builds, it helps protect equipment from under- or over-voltage conditions.

Built for demanding environments, the PMV55A440 relay offers Ith (IEC) 8 A and a 6 kV impulse withstand for robust insulation performance. With 30,000,000 mechanical cycles and -20 to +60 °C operating temperature, it delivers long service life. Compliance includes IEC/EN 60255-5, IEC/EN 61000-6-2/-6-3, UL 508 and CSA C22.2 n° 14, supporting industry and EMC requirements.

Key Benefits

• Under- and over-voltage monitoring for single-phase supplies, 380...575 VAC, 50/60 Hz.
• Self powered design removes the need for an external supply.
• Potentiometer adjustment enables quick, precise threshold setup.
• Single relay output for clear alarm or control signalling.
• High mechanical life rated at 30,000,000 cycles.
• 6 kV impulse withstand for robust insulation performance.
• Reliable operation across -20 to +60 °C ambient.
• Conforms to IEC/EN, UL 508 and CSA C22.2 standards.

Technical Specification

• Product type designation: PMV55
• 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: 125 g

What’s Included

• PMV55A440 voltage monitoring relay unit
• Quick start and safety information
• Manufacturer datasheet (downloadable)
• Packaging for transit protection

Applications

• Single-phase mains supply protection and supervision
• Industrial control panels and OEM machinery
• Building services and facility power monitoring
• Pump, fan and compressor circuits on single-phase feeds
• Distribution cabinets requiring voltage threshold monitoring

Safety note: Installation and commissioning must be performed by qualified personnel. Isolate all power sources before wiring or adjustment and follow applicable standards and the manufacturer’s instructions.