Single-Phase Over- and Undervoltage Monitoring (Window Monitoring)

Window voltage monitors ensure the voltage remains within preselected over- and undervoltage threshold values (trip points). If the voltage exceeds the upper limit or falls below the lower limit, the output relay (c/o) energizes / de-energizes. A selectable latching function and an adjustable tripping delay prevent nuisance tripping.

Product range overview
CM-EFS.2 – Over- and undervoltage monitoring (window monitoring)

Characteristics of CM-EFS.2 window voltage monitors

• Single-function devices
• Devices with 2 c/o (SPDT) contacts rated 250 VAC at 4 A
• Measuring ranges up to 600V AC/DC
• Selectable open- (normally de-energized) or closed-circuit (normally energized) principle
• Adjustable ON- or OFF-delay (0; 0.1 - 30 s)
• Fixed switching hysteresis of 5 %
• Wide supply voltage range
• LEDs for status indication
• Adjustment of threshold values (trip points) 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)

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)