Carlo Gavazzi PWA01CM485A cos phi monitoring relay for three-phase 380–480 V AC motor load monitoring and industrial automation applications.
£131.90
The Carlo Gavazzi PWA01CM485A is a reliable three-phase cos phi monitoring relay designed for monitoring motor load conditions and detecting changes in power factor within industrial electrical systems. As part of the Carlo Gavazzi PWA01 power monitoring relay series, it provides accurate cos phi supervision for motor protection, automation and process control applications.
This monitoring relay measures the power factor of AC motors and electrical loads, helping identify underload conditions, loss of load and inefficient operation. Its compact plug-in housing design enables simple installation in industrial control panels while providing dependable relay-based switching for alarm and control functions.
With a 380–480 V AC three-phase supply range, a measurement capability of up to 5 A or through compatible MI current transformers, and a 1 SPDT relay output, the PWA01CM485A is suitable for monitoring pumps, fans, motors and industrial machinery.
Cos phi monitoring relays such as the Carlo Gavazzi PWA01CM485A provide an effective method of supervising motor operation by measuring the relationship between voltage and current. Monitoring power factor allows control systems to identify abnormal load conditions and improve equipment reliability.
The PWA01 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 easy integration into motor control and protection systems.
| Manufacturer | Carlo Gavazzi |
|---|---|
| Series | PWA01 Power Monitoring Relays |
| Model | PWA01CM485A |
| Product type | Cos phi monitoring relay |
| Monitoring function | Power factor (cos phi) |
| Mains voltage | 380–480 V AC |
| Three-phase voltage range | 380–480 V AC |
| Current measurement range | Up to 5 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 |
| Mounting type | Plug-in |
| Connection type | Plug-in connection |
| Housing width | 36 mm |
| Time delay | No delay adjustment |
The PWA01CM485A is used for monitoring the power factor (cos phi) of three-phase AC motors and electrical loads in industrial applications.
The Carlo Gavazzi PWA01CM485A operates from a 380–480 V AC three-phase supply.
The relay supports measurement up to 5 A directly or through compatible MI current transformers.
The PWA01CM485A 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...