Why Choose the Lovato PMA40240 Current Monitoring Relay?
The Lovato PMA40240 is a versatile AC/DC current monitoring relay designed to detect minimum and maximum current conditions in single-phase and three-phase electrical systems. As part of the dependable Lovato Electric PMA40 monitoring relay series, it provides accurate supervision of motors, pumps, machinery and industrial electrical loads.
The PMA40240 offers six selectable current ranges of 0.02, 0.05, 0.25, 1, 5 and 16 A, allowing the same relay to monitor applications ranging from low-current control circuits to larger industrial loads. It operates from a universal 24–240 V AC/DC auxiliary supply, simplifying product selection across control panels with different supply voltages.
With independently adjustable minimum and maximum current thresholds, configurable timing functions and two relay outputs, the PMA40240 supports comprehensive undercurrent and overcurrent protection. Its compact DIN rail design provides a practical monitoring solution for equipment where dependable operation and accurate current supervision are essential.
Key Advantages
- Monitors both minimum and maximum AC/DC current.
- Suitable for single-phase and three-phase electrical systems.
- Six selectable current ranges from 0.02 to 16 A.
- Wide 24–240 V AC/DC auxiliary supply.
- Two relay outputs for alarms, interlocks and equipment control.
- Adjustable thresholds and delay settings for application-specific monitoring.
- Compact DIN rail format for industrial control panels.
Key Features
- Lovato Electric PMA40 series.
- Minimum and maximum AC/DC current monitoring.
- 0.02, 0.05, 0.25, 1, 5 and 16 A selectable ranges.
- 24–240 V AC/DC universal auxiliary supply.
- Suitable for direct measurement or use with a current transformer.
- Independently adjustable minimum and maximum current thresholds.
- Adjustable tripping delay.
- Automatic or manual reset functionality.
- Two relay outputs.
- Front LED indication for supply and output status.
- Screw terminal connections.
- Standard DIN rail mounting.
Comprehensive Current Monitoring for Industrial Equipment
The Lovato PMA40240 continuously measures current and compares it with independently configured minimum and maximum thresholds. If the current moves outside the permitted operating range for longer than the selected delay, the relay outputs can activate alarms, disconnect equipment or communicate the condition to a control system.
This dual-threshold monitoring helps identify overloads, stalled motors, dry-running pumps, broken drive components and abnormal no-load conditions. The selectable measurement ranges also allow one relay type to be used across a wide variety of industrial applications.
Typical Applications
- Motor underload and overload monitoring.
- Pump dry-running and blockage protection.
- Conveyor belt and drive system supervision.
- Fan and ventilation equipment monitoring.
- Industrial machinery and production equipment.
- Heating element and electrical load supervision.
- Process automation and alarm systems.
- Industrial control panels and switchboards.
