Lovato PMA40240 minimum and maximum AC/DC current monitoring relay for single-phase and three-phase systems, with six selectable current ranges and a 24–240 V AC/DC supply.
£314.96
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.
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.
| Voltage | 240 V |
|---|---|
| Phase | Single Phase |
| Manufacturer | Lovato Electric |
| Series | PMA40 |
| Model | PMA40240 |
| Product type | Current monitoring relay |
| Monitoring function | Minimum and maximum current |
| Measured current type | AC / DC |
| System type | Single-phase and three-phase |
| Selectable current ranges | 0.02 A, 0.05 A, 0.25 A, 1 A, 5 A and 16 A |
| Auxiliary supply voltage | 24–240 V AC/DC |
| Rated frequency | 50 / 60 Hz |
| Relay outputs | 2 |
| Output contact type | Changeover relay contacts |
| Adjustable trip delay | 0.1–30 seconds |
| Reset mode | Automatic or manual |
| Programming method | Front-mounted controls |
| Status indication | LED indicators |
| Terminal type | Screw terminals |
| Mounting type | DIN rail |
| Front protection rating | IP40 |
| Terminal protection rating | IP20 |
| Operating temperature | -20°C to +60°C |
| Dimensions (W × H × D) | Approx. 53.5 × 104.7 × 64.9 mm |
| HS Code | 85364900 |
The PMA40240 monitors AC or DC current and detects both minimum and maximum current conditions in industrial electrical systems.
The relay provides selectable current ranges of 0.02, 0.05, 0.25, 1, 5 and 16 A.
Yes. It provides minimum and maximum current monitoring, allowing it to detect both underload and overload conditions.
The PMA40240 operates from a universal 24–240 V AC/DC auxiliary supply.
The PMA40240 provides two relay outputs, allowing separate alarm, control or interlocking functions to be implemented.
The relay mounts on a standard DIN rail inside an electrical control panel and uses screw terminals for the monitored circuit, supply and output connections.
Lovato Electric monitoring relays are used by panel builders, machine manufacturers and automation engineers to protect equipment, identify abnormal operating conditions and improve the reliability of industrial control systems.
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2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...