power factor monitoring relay / SPDT / single-phase / three-phase
CM-LWN series

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power factor monitoring relay power factor monitoring relay - CM-LWN series


  • Measured/monitored value:

    power factor

  • Contact configuration:


  • Other characteristics:

    single-phase, three-phase, for electric motors


The motor load monitor CM-LWN monitors the load of single-phase and three-phase asynchronous motors. The evaluation of the phase angle between current and voltage (cosφ monitoring) allows a very precise monitoring of the load status.
Characteristics of CM-LWN motor load monitors

· 2 x 1 c/o (SPDT) contact
· Wide- or single-supply voltage range
· Under- and overload monitoring in one unit (window monitoring)
· Direct measurement of currents up to 20 A*, higher ratings possible with external current transformers CM-CT
· Single-phase or three-phase monitoring
· Adjustable ON-delay (0.2 - 2 s)
· Adjustable start-up delay (0.3 - 30 s)
· Adjustment of threshold values (trip points) and time delays via direct reading scales
· Setting and operation via front-face operating controls
· LEDs for status indication
· 45 mm wide enclosure
· Integrated and snap-fitted front-face marker
· Sealable transparent cover (accessory)
· Adapter for screw (surface) mounting (accessory)