PMA50A480 - PUMP PROTECTION RELAY 440-480VAC

Why Choose the Lovato PMA50A480 Pump Protection Relay?

The Lovato PMA50A480 is a reliable pump protection relay designed for monitoring single-phase and three-phase pump systems. As part of the Lovato PMA50 protection relay series, it provides dependable protection for pump motors by monitoring maximum AC current, minimum power factor, phase loss and incorrect phase sequence.

This relay helps protect pumps from damaging operating conditions such as dry running, overload, phase loss and incorrect phase sequence. Adjustable potentiometer settings allow protection thresholds and timing functions to be configured to suit the application, helping improve system reliability and reduce downtime.

With a rated supply voltage of 440–480 V AC and selectable rated current settings of 5 A or 16 A, the PMA50A480 is ideal for industrial pump control panels and machinery operating on higher voltage three-phase power systems.

Key Advantages

• Reliable pump protection relay for motor monitoring.
• Suitable for single-phase and three-phase pump systems.
• Monitors maximum AC current and minimum cosφ.
• Detects phase loss and incorrect phase sequence.
• 440–480 V AC supply voltage for industrial applications.
• Selectable 5 A or 16 A rated current settings.

Key Features

• Lovato PMA50 pump protection relay series.
• Maximum AC current monitoring.
• Minimum cosφ monitoring for dry-run protection.
• Phase loss and incorrect phase sequence detection.
• Single-phase and three-phase compatibility.
• 1 SPDT relay output.
• Automatic or manual reset selection.
• DIN rail mounting with front potentiometer adjustment.

Technical Specifications

• Manufacturer: Lovato Electric
• Series: PMA50
• Model: PMA50A480
• Product type: Pump protection relay
• Monitoring functions: Maximum AC current, minimum cosφ, phase loss and incorrect phase sequence
• System type: Single-phase and three-phase
• Rated supply voltage: 440–480 V AC
• Operating voltage range: 0.85–1.1 Us
• Rated frequency: 50 / 60 Hz
• Rated current: 5 A or 16 A
• Relay outputs: 1 SPDT changeover contact
• Programming mode: Potentiometers
• Mounting type: DIN rail
• Protection rating: IP40 front, IP20 terminals
• Dimensions (W × H × D): 53.5 × 104.7 × 64.9 mm
• Weight: approx. 282 g

Reliable Pump Protection and Dry-Run Monitoring

Pump protection relays such as the Lovato PMA50A480 continuously monitor motor current and power factor to detect overload, underload and dry-running conditions before they can damage pumps or associated equipment.

The relay also monitors phase loss and incorrect phase sequence, making it suitable for demanding industrial pump installations where reliable motor protection is essential for maximising uptime and reducing maintenance costs.

Typical Applications

• Industrial pump control panels.
• Water treatment and distribution systems.
• Borehole and irrigation pumps.
• Process and transfer pumping equipment.
• Building services and HVAC pumping systems.
• Motor protection within industrial automation systems.

Trusted by Pump System Engineers Worldwide

Lovato PMA50 pump protection relays are trusted by panel builders, machine manufacturers and maintenance engineers for dependable pump protection, dry-run detection and motor monitoring across industrial applications.