KATC-C1 Instructions
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General Information
The Knopp Automatic Transformer Comparator (KATC-C1) is used to measure the ratio and phase
angle errors of current transformers with respect to a "standard" or "precision" transformer. This
microprocessor-based instrument automatically selects the optimum measurement range, computes
the results, and digitally displays several values, including:
the transformer ratio and phase angle errors,
the ANSI accuracy class for which the transformer qualifies,
the test current in the secondary of the precision transformer, and
the test current in the secondary of the Transformer-Under-Test.
The KATC-C1 has protective circuitry which helps prevent damage when the Transformer-Under-
Test (TUT) is improperly connected.
A serial (RS-232C) input/output port is included as a standard feature. This port can be used to
download KATC-C1 test data to a computer for data storage and/or analysis. The port can also be
used to control various functions of the KATC-C1 from a computer.
The KATC-C1 is designed to test transformers with secondaries of one or five amperes. It automati-
cally senses, and adjusts to, operation at 50 or 60 Hz.
The KATC-C1 has been designed to make testing transformers as easy and fast as possible without
sacrificing accuracy or reliability. We trust that you will find it to be a useful instrument in performing
this task.
Chapter
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