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Current Transformer Testing System

The Knopp Current Transformer Testing System (Type KCTS-8000) is designed to measure the accuracy of instrument transformers having 1 or 5 ampere secondaries and primaries of up to 8000 amperes. The system uses a high accuracy multi-range current transformer as a reference standard. All ANSI standard burdens are included. The phase angle and ratio errors of the transformer-under-test (TUT) are measured by the built-in Knopp Automatic Transformer Comparator.

Standard features of the KCTS include:

  • AUTOMATIC and AUTORANGING Type KATC-C1 Current Transformer Comparator provides minimum measurement time (typically within three seconds after adjustment of test current).
  • DIGITAL DISPLAY of test current, ratio error (in Percent or Ratio Correction Factor), phase angle error (in Minutes or Milliradians), and Accuracy Class of the TUT.
  • SELF CHECK feature allows the KCTS system accuracy to be easily verified without the use of an external reference standard.
  • PROTECTIVE CIRCUITRY senses error conditions, such as wrong ratio or wrong polarity, and then removes power from the KCTS loading circuitry.
  • ZERO START feature requires that both coarse and fine test current controls be at zero before power can be applied to the loading circuitry (and thus the TUT).
  • MOTORIZED CONTROL of the test current is provided to minimize test time. This allows AUTOMATIC RUNDOWN of the test current after the test is complete.
  • SERIAL (RS-232C) output port to allow transfer of test results to a printer or data collection system.
  • CONNECTION KIT which includes cables to facilitate connection of most instrument transformers to the KCTS terminals.
  • ANSI BURDENS 0.04 through 8 (see list of included burdens) and good down to Accuracy class 0.15 Testing.
  • DEMAGNETIZATION of Transformers prior to test.
  • System Accuracy: within ±0.025% on ratio and ±2 minutes on phase angle at 1.2, or less, accuracy class.
  • Test Current Ranges:5, 10, 15, 20, 25, 30, 40, 50, 60, 75, 80, 100, 120, 125, 150, 160, 200, 250, 300, 400, 500, 600, 750, 800, 1000, 1200, 1500, 1800, 2000, 2500, 3000, 4000, 5000, 6000, 7500, and 8000 amperes.
  • Included ANSI Burdens: B-.04, B-0.1, B-0.2, B-0.5, B-0.9, B-1, B-1.8, B-2, B-4, and B-8.
  • Burdens up to B-1.8 are rated for 400% tests while the remaining burdens (B-2,B-4, B-8) are rated for 200% tests. Provisions are made for use of an external burden.
  • Input power: 208 or 240 VAC (specify at time of order), single phase, 60 Hz, at 200 amperes maximum. And a separate 120 VAC source at 5 amperes..
Equipment Documentation
Equipment Troubleshooting

Connecting a 400:5 (or similiar CT) to the KCTS

Current Transformer Testing System
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Field repair and calibration are also available if you are not ready to replace your exisiting transformer test system. Contact us for more information.

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