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ITTS Series
Brand: ZERA Gmbh
Model: ITTSxxx Stationary and mobile instrument transformer test systems (ITTS) from ZERA are developed for testing current instrument transformers (CT) and voltage instrument transformers (VT). Stationary test systems are available for manual or automatic operation. Transformer testing serves for the accuracy test including polarity check and demagnetization for current and voltage transformers in low-voltage, middle-voltage and high-voltage grids according to IEC standard 60044-1, 60044-2, 60044-7, 60044-8 and 61850-9-2 or ANSI IEEE C57.13.
ZERA configures ITTS for CT or VT/PT testing as well as combined test systems for CT and VT/PT testing. ZERA's test systems can be designed for testing instrument transformer manually or automatically. Process of CT/VT Testing: The test compares the ratio error of the CT or PT under test with the standard transformer of the test equipment. The result of ratio error and phase displacement will be indicated. The comparisation takes place in a self-calibrating comparator (Measuring Bridge). The PC shows the following measurement results: - Rated current (%In)/ Rated voltage (%Un) - Ratio error (%) - Phase displacement error (min) - Frequency (Hz) The PC stores the measurement results. The results are compared with the error values corresponding to the accuracy class. CTs or PTs which errors are outside the allowable limits are marked as FAIL. Stationary ITTS- Testing of current/voltage transformers in low, middle and high-voltage grids
- Accuracy test, polarity check and demagnetisation - CT one-by-one testing Example: For low and middle voltage instrument transformer CT/VT testing:
Suitable for the following CTs:
Suitable for the following VTs:
Used components amongst others:
Mobile ITTS- Testing of current/voltage transformers in low, middle and high-voltage grids
- Accuracy test, polarity check and demagnetisation Example: Voltage transformer:
Current transformer:
Used components amongst others:
Our products are fully customisable in order to suit different needs. Please contact our sales representative for more details. |