CM-SRS single-phase over- or undercurrent monitors are used to monitor the proper operation of equipment and control systems.
Adjustable current threshold values (trip points) ensure the current remains within an acceptable range. Select either over- or undercurrent monitoring. If the current 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 undercurrent monitoring with CM-SRS.1, CM-SRS.2 and CM-SRS.M
Characteristics of CM-SRS.1, CM-SRS.2 and CM-SRS.M current 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 15 A AC/DC*
- Selectable open- (normally de-energized) or closed-circuit (normally energized) principle *
- Adjustable ON- or OFF-delay (0; 0.1 - 30 s)*
- Adjustable start-up 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 currents: DC and 15 Hz – 2000 Hz
- Integrated and snap-fitted front-face marker
- Sealable transparent cover (accessory)
- Adapter for screw (surface) mounting (accessory)
- External current transformers CM-CT for higher currents (accessory)
Examples of application
- Monitoring of motor current consumption
- Monitoring of lighting installations and heating circuits
- Monitoring of hoisting gear and transportation equipment overload
- Monitoring of locking devices, electromechanical brake gear and lock rotor