Carlo Gavazzi PWB01CM4810A power factor monitoring relay for three-phase 380–480 V AC motor load monitoring and industrial automation applications.
£178.91
The Carlo Gavazzi PWB01CM4810A is a reliable three-phase power factor (cos phi) monitoring relay designed for monitoring motor load conditions and detecting changes in electrical performance within industrial systems. As part of the Carlo Gavazzi PWB01 power monitoring relay series, it provides accurate power factor supervision for motor protection, automation and process control applications.
This monitoring relay measures the power factor of three-phase AC loads to identify abnormal operating conditions such as underload, overload or loss of mechanical load. Its compact plug-in housing design enables simple installation while providing dependable relay switching for alarm and control circuits.
With a 380–480 V AC three-phase voltage range, a measurement capability up to 10 A or through compatible MI current transformers, and a 1 SPDT relay output, the PWB01CM4810A is suitable for monitoring pumps, motors, fans and industrial machinery.
Power factor monitoring relays such as the Carlo Gavazzi PWB01CM4810A provide an effective method of supervising motor operation by measuring the relationship between voltage and current. Changes in cos phi can indicate variations in mechanical load, allowing control systems to react quickly to abnormal conditions.
The PWB01 series is designed for industrial automation engineers and machine builders requiring dependable electrical monitoring. Its compact plug-in format, relay output and compatibility with current transformers allow simple integration into motor control and protection systems.
| Manufacturer | Carlo Gavazzi |
|---|---|
| Series | PWB01 Power Monitoring Relays |
| Model | PWB01CM4810A |
| Product type | Power factor (cos phi) monitoring relay |
| Monitoring function | Power factor |
| Supply voltage | 380–480 V AC |
| Three-phase voltage range | 380–480 V AC |
| Current measurement range | Up to 10 A or via MI current transformers |
| Cos phi measurement range | 0.1–0.99 |
| Frequency range | 45–65 Hz |
| Output | 1 x SPDT change-over contact |
| Alarm function | Over and under power factor monitoring |
| Time delay | Delay on alarm |
| Maximum permitted delay-on energisation time | 30 s |
| Mounting type | Plug-in |
| Electrical connection | Plug-in connection |
| Housing width | 36 mm |
| Protection rating | IP20 |
The PWB01CM4810A is used for monitoring the power factor (cos phi) of three-phase AC motors and electrical loads in industrial applications.
The Carlo Gavazzi PWB01CM4810A operates from a 380–480 V AC three-phase supply.
The relay supports measurement up to 10 A directly or through compatible MI current transformers.
The PWB01CM4810A provides a 1 x SPDT change-over relay output for switching and alarm applications.
The relay uses a compact 36 mm plug-in housing for installation in industrial control panels.
Carlo Gavazzi monitoring relays are widely used in industrial automation and control systems to provide dependable electrical monitoring, motor protection and efficient machine operation.
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LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
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...