• 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
    • Built-in Micro Ohmmeter 200A
    • Dynamic resistance measurement
    • Detailed analysis of test results using DV-Win software

    The Circuit Breaker Analyzer & Timer CAT125 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.

    Static resistance measurement
    The built-in micro ohmmeter generates a true DC ripple free current with an automatically regulated test ramp.

    DRM (Dynamic Resistance Measurement)
    The built-in micro ohmmeter can also be used for the DRM. The DRM test is performed by injecting a current through the breaker contact and simultaneously monitoring the voltage drop across the breaker contact as well as the current flow during the operation of the breaker. The DRM test requires the circuit breaker analyzer with a high-resolution measurement. The resistance curve, as a function of a contact travel can be used to reveal potential problems related to the arcing contact condition. The injected current value should be as high as possible but not less than 100A to provide a reliable voltage drop reading, thus allowing an easier detection of the arcing contact. This model provides up to 200A.

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
  • Current cables 2 x 10 m 25 mm2   (32.8 ft, 3 AWG) with battery    clamps
  • Sense cables 2 x 10 m (32.8 ft)    with alligator clamps
  • Cable plastic case – large size    (x 2)
  • 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)
  • Current cables 2 x 5 m 25 mm2   (32.8 ft, 3 AWG) with battery    clamps
  • Sense cables 2 x 5 m (32.8 ft)    with alligator clamps
  • Current cables 2 x 15 m 35 mm2   (49.2 ft, 2 AWG) with battery    clamps
  • Sense cables 2 x 15 m (49.2 ft)    with alligator clamps
  • 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.