UniWave Electric
Bessen has the industry’s most comprehensive range of time relays, measuring and monitoring relays, Thermistor motor protection relays - helping customers source all their critical components from a single global supplier. Increase the reliability of process equipment with control devices that provide intelligent signals and smart adjustments that help you achieve maximum system availability.
| Specification | Details |
| Product Name | Three-phase monitoring relay |
| Function | Phase failure detection, Phase sequence monitoring |
| Sub-Function | Phase loss |
| Sub-Function 2 | Phase sequence |
| Rated Control Supply Voltage (Us) | (L-L) 208 ... 440 V AC |
| Rated Frequency (f) | Rated Frequency (f) |
| Output | 1 c/o (SPDT) contact |
| Maximum Operating Voltage UL/CSA | Output Circuit 250 V AC |
| Rated Operational Voltage | 220V |
| Terminal Type | Screw Terminals |
| Maximum Operating Altitude Permissible | Without Derating 2000 m |
| Ambient Air Temperature | Operation -20~60°C, Storage -40~85 °C |

The reliable and continuous monitoring of three-phase networks guarantees the trouble-free and cost-effective operation of machines and installations. Bessen's three-phase monitoring relays for rated voltage levels up to 820 V AC and 400 Hz offer maximum flexibility and control.

Main Feature & Advantage:





The CM-PFE relay is from the CM three-phase monitors range. This relay operates with a rated control supply voltage / three-phase measuring voltage of 208-440 V AC and has a 1 c/o output (closed circuit principle) with contacts rated at 250 V / 4 A. The CM-PFE monitors the phase loss and phase sequence. The corresponding threshold values are fixed. The relay is suitable for monitoring of three phase mains.


Bessen offers a wide selection of measuring and monitoring relays to suit a wide range of applications for businesses worldwide. Excellent vibration resistance with the Easy Connect terminal technology and railway certifications for selected products ensure the operability, even in harsh environments.