Circuit Breaker Analyzer & Timer CAT31



  • Simple & easy to operate
  • Timing measurement
  • 3 Channels for main contacts
  • 3 Channels for auxiliary inputs
  • TRIP & CLOSE coils current measurement
  • Resistance measurement of pre-insertion resistors
  • Detailed analysis of test results with DV-Win software

The Circuit Breaker Analyzer & Timer CAT31 is a standalone or a PC-controlled digital instrument for condition assessment of the circuit breakers. It is intended for timing measurement of circuit breakers with one break per phase.

Multiple operations, such as Open-Close and Open-Close-Open, can be initiated by using a predefined delay time or by sensing a breaker’s contact position. External trigger is used to start timing of the breaker when sensing a voltage.

The auxiliary inputs are used to monitor the auxiliary (52a and 52b) contacts. The external trigger input can be used as the third auxiliary input.

The main contact channels can also measure the resistance value of the pre insertion resistors if they are present in the circuit breaker. Test results are printed on the 80 mm thermal printer (optional accessory) in tabulated and graphical form.


Included accessories

  • DV-Win software
  • USB cable
  • Mains power cable
  • Ground (PE) cable
Recommended accessories

    • Main Contact Cables 5 m with SCT clamps
    • External trigger cable 5 m with banana plugs
    • Coil control cable set 5 m with banana plugs
    • Coil supply cable set 2 x 5 m 2,5 mm2 with banana plugs
    • Auxiliary contacts cable set 5 m with banana plugs
  • Transport case
Optional accessories

  • Main Contact Cables Extension 5 m
  • Main Contact Cables Extension 10 m
  • Thermal printer 80 mm (3.15 in)(built-in)
  • Thermal paper roll
  • Coil control cable set 10 m with banana plugs
  • Auxiliary contact cable set 10 m with banana plugs
  • External trigger cable 10 m with banana plugs


Viewing and overlaying several graphs for complete and easy test result comparison. Selecting the measurement points and intervals using two available cursors. Zoom and pan graph feature. Specific test sequence setup. Customized configuration of test result graphs.

For the CAT form of DV-Win software there is Help menu available, with detailed instructions and explanations of all functions and features.



Application Notes

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