Single-Phase Over- or Undervoltage Monitoring

Adjustable voltage threshold values (trip points) ensure the voltage remains within an acceptable range. Select either over- or undervoltage monitoring. If the voltage exceeds the upper limit or falls below the lower limit the output relay energizes / de-energizes. An adjustable tripping delay prevents nuisance tripping.

Product range overview
Over- or undervoltage monitoring with CM-ESS.1, CM-ESS.2 and CM-ESS.M

Characteristics of CM-ESS.1, CM-ESS.2 and CM-ESS.M voltage monitors

• Multifunction and single-function devices
• Devices with 1 or 2 c/o (SPDT) contacts rated 250 VAC at 4 A
• Measuring ranges up to 600 V AC/DC
• Selectable open- (normally de-energized) or closed-circuit (normally energized) principle *
• Adjustable ON- or OFF-delay (0; 0.1 - 30 s)*
• Adjustable switching hysteresis 3 - 30 %
• Wide- or single-supply voltage range
• LEDs for status indication
• Adjustment of threshold values (trip points), hysteresis and time delays via direct reading scales
• Setting and operation via front-face operating controls
• Configurable latching function*
• RMS measuring principle (any wave form)
• Frequency range of measured voltages: DC and 15 Hz – 2000 Hz
• Integrated and snap-fitted front-face marker
• Sealable transparent cover (accessory)
• Adapter for screw (surface) mounting (accessory)
  * depending on device

Examples of application

• Speed monitoring of DC motors
• Monitoring of battery voltages and other supply networks
• Monitoring of upper and lower voltage threshold values (trip points)