PMA50A240 - PUMP PROTECTION RELAY 220-240VAC

Why Choose the Lovato PMA50A240 Pump Protection Relay?

The Lovato PMA50A240 is a dependable pump protection relay designed for monitoring single-phase and three-phase pump systems. As part of the Lovato PMA50 protection relay series, it provides essential supervision for pump motors by monitoring maximum AC current, minimum power factor and phase conditions.

This relay helps protect pumps from damaging operating conditions such as dry running, overload, phase loss and incorrect phase sequence. Its adjustable potentiometer settings allow the protection thresholds and timing functions to be configured to suit the application, helping improve reliability in industrial, commercial and building services installations.

With a rated supply voltage of 220–240 V AC and selectable rated current settings of 5 A or 16 A, the PMA50A240 is suitable for direct motor monitoring or integration into control panels. Its compact DIN rail mounted format makes it straightforward to install in electrical enclosures and pump control 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.
• 220–240 V AC supply voltage for standard control systems.
• 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 system compatibility.
• 1 relay output for control or signalling.
• Programming and adjustment via front potentiometers.
• DIN rail mounting for compact panel installation.

Technical Specifications

• Manufacturer: Lovato Electric
• Series: PMA50
• Model: PMA50A240
• 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: 220–240 V AC
• Rated frequency: 50 / 60 Hz
• Rated current Ie: 5 A or 16 A
• Number of relay outputs: 1
• Output contact type: Changeover relay output
• Programming mode: Potentiometers
• Mounting type: DIN rail mounting
• Connection type: Screw terminals
• Housing format: Modular DIN rail enclosure
• Weight: approx. 280 g

Reliable Pump Protection and Dry-Run Monitoring

Pump protection relays such as the Lovato PMA50A240 help safeguard pump motors by detecting abnormal current and load conditions. By monitoring current and power factor, the relay can identify situations where the pump is overloaded, running without liquid or operating under unsafe phase conditions.

The PMA50A240 is well suited to control panels where reliable pump supervision is required. Its phase monitoring, current control and dry-run protection functions help reduce downtime, prevent motor damage and support more dependable operation across water, process and industrial pumping systems.

Typical Applications

• Pump control panels and motor protection systems.
• Dry-run protection for water pumps.
• Industrial pumping and process systems.
• Building services pump installations.
• Phase loss and phase sequence monitoring.
• Overload and underload detection for pump motors.

Trusted by Pump System Engineers Worldwide

Lovato PMA50 pump protection relays are widely used by panel builders, maintenance engineers and pump system specialists to provide reliable motor protection, dry-run monitoring and phase supervision in demanding electrical installations.