- 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.
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.
- Measuring coil resistance using CAT device
- Deciding on length of a linear transducer for different types of circuit breakers
- Why do we record an actuating coil current waveform
- Dynamic contact resistance measurement
- First trip test
- Installation of linear and rotary motion transducers
- Using Test System CAT+SAT for CB Testing
- Using Non-linear Transfer Function for Rotary to Linear Motion Conversion
- O-C Time Results Interpretation
- Close-Open (Short-Circuit) Time Results Interpretation
- Recording Spring-Charging Motor Current Waveform