Circuit Breaker Analyzer & Timer CAT124A



  • Timing and motion measurement
  • 12 timing channels (3×4) for main and resistive contacts
  • 6 timing channels for auxiliary inputs
  • 6 coil control channels
  • 3 transducer input channels
  • 6 additional analog input channels
  • Detailed analysis of test results using DV-Win software

The Circuit Breaker Analyzer & Timer CAT124A instrument utilizes the latest improvements for safe and fast testing, with unique technical capabilities for additional diagnostics of circuit breakers. Sophisticated design ensures efficient and reliable operations in high-voltage substations and industrial environments.

First trip test
A “First trip” analysis is important to determine a condition of the coil operating mechanism. A circuit breaker spends most of its lifetime conducting a current without any operation. Once the protective relay detects a problem, the circuit breaker, that was idle for maybe a year or longer, has to operate as fast as possible. However, if the circuit breaker has not been operated for a long time, the latch friction may increase. Information about the latch friction can be obtained from the coil current waveform recorded during the “First trip” test.


Included accessories

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

  • Main contact cables 5 m (16.4 ft)    with SCT clamps
  • Main contact cables Extension
       10 m (32.8 ft)
  • Coil control cable set 5 m (16.4 ft)    with banana plugs
  • Coil supply cable set 2 x 5 m
       2,5 mm2 (16.4 ft, 13 AWG) with    banana plugs
  • Auxiliary contacts cable set
       12 x 5 m (16.4 ft) with banana    plugs
  • Analog channels cable set
       12 x 5 m (16.4 ft) with banana    plugs
  • Cable plastic case – large size
  • Transport case
Optional accessories

  • Current clamp 30/300 A power    supplied from the instrument with    adapter 5 m (16.4 ft)
  • Current clamp 30/300 A with    internal battery supply and    extension 5 m (16.4 ft)
  • Thermal printer 112 mm (4.4 inch)    (built-in)
  • Thermal paper roll
  • Main contact cables Extension
       5 m (16.4 ft)
  • Main contact cables Extension
       15 m (49.2 ft)
  • Cable plastic case with wheels –    large size
  • Digital rotary transducer with 5 m    (16.4 ft) connection cable
  • Linear analog transducer 150 mm    (5.9 in) with 5 m (16.4 ft)    connection cable
  • Linear analog transducer 225 mm    (8.85 in) with 5 m (16.4 ft)    connection cable
  • Linear analog transducer 300 mm    (11.8 in) with 5 m (16.4 ft)    connection cable
  • Linear analog transducer 500 mm    (19.68 in) with 5 m (16.4 ft)    connection cable
  • Universal transducer mounting kit
  • Universal transducer mounting kit    – extended version
  • Doble transducer adapter
  • Linear to rotary convertor



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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