Circuit Breaker Analyzer & Timer CAT-H

  • Compact and ergonomic design – only 1,6 kg (3.5 lbs)
  • Simple and easy to operate
  • Battery operation for up to 8 hours
  • Timing and coil current measurement
  • Coil control (built-in) for OPEN and CLOSE coil
  • Graphical results for quick interpretation
  • Touch screen color display 145 mm (5.7 in)
  • On-site analysis of test results (overlay up to 4 records in graphical form)

Handheld Circuit Breaker Analyzer & Timer CAT-H is a digital instrument for circuit breakers condition assessment. CAT-H records graphs of both, open and close coil currents, timing of main arcing contacts, DC substation battery voltage. The timing channels record closing and opening of the main contacts and can also measure the resistance value of the pre-insertion resistors (if present in the circuit breaker).
CAT-H provides an easy selection of different operating modes:

  • Open (O)
  • Close (C)
  • Trip free (CO)
  • Reclose (O-C)
  • Close-Open (C-O)
  • Open-Close-Open (O-C-O)

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.
The circuit breaker operation can be initiated in different ways (for instance from a control room, by a local switch or externally by a testing device) depending on a testing condition. The several time measurement triggers are available to record a measurement in a various testing condition:

  • Coil control channel
  • DC current clamp channel
  • DC voltage channel

CAT-H is a powerful diagnostic tool for recording and analyzing:

  • Main arcing contacts operation
  • Trip/Close coils operation
  • Auxiliary contact operation
  • DC supply voltage
  • Integrity of control circuit wiring

CAT-H displays numerical and graphical results (it can overlay up to 4 records in graphical form). This enables quick onsite analysis of potential defects by comparing the obtained test results.


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