PMF20A240 - MULTIFUNCTION FREQUENCY PROTEC TION RELA

Why Choose the PMF20A240?

The Lovato PMF20A240 frequency monitoring relay safeguards single‑phase systems operating at 220…240VAC, 50/60Hz. Designed to detect minimum and maximum frequency conditions, the PMF20 series device is self powered from the monitored supply and provides one relay output for control or signalling. Simple potentiometer-based programming streamlines setup, helping panel builders and maintenance teams ensure stable operation and timely intervention in industrial and commercial installations.

Built to perform in demanding environments, this PMF20 frequency monitoring relay offers 8 A Ith (IEC) and a 6 kV impulse withstand voltage. With a mechanical life of 30,000,000 cycles and an operating range from -20 to +60 °C, it ensures long service life. Compliance with IEC/EN 60255-5, 61000-6-2, 61000-6-3, UL 508 and CSA C22.2 n° 14 supports straightforward specification and integration.

Key Benefits

• Reliable frequency monitoring for single-phase 220…240VAC, 50/60Hz systems
• Detects minimum and maximum frequency excursions to protect equipment
• Self powered design simplifies wiring and panel integration
• Potentiometer-based setup enables quick, tool-free configuration
• Robust relay output with 8 A Ith (IEC) rating
• High surge immunity with 6 kV impulse withstand voltage
• Wide -20 to +60 °C operating temperature for harsh environments

Technical Specification

• Product type designation: PMF20
• 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

• Lovato PMF20A240 frequency monitoring relay
• Instruction leaflet

Applications

• Single-phase mains frequency supervision in control panels
• Equipment protection against underfrequency and overfrequency events
• Monitoring supply stability in industrial and commercial installations
• Automation and process control requiring frequency-based alarms

Safety note: Installation and commissioning should be performed by qualified personnel. Isolate power before wiring, follow applicable standards, and verify correct settings before energising the system.