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2767

2767
4Pages

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Automatic Instrument Transformer Test Set ■ The type 2767 automatic current and voltage transformer test set is a modern, fully automatic instrument for fast and accurate measurement of instrument transformer errors. Increasingly severe quality control requirements call for a higher degree of operating comfort and absolute reliability of the measuring equipment employed. Based on the latest design technology, this instrument sets new standards of quality, reliability, convenient operation and simple Its measurement ranges for current/voltage errors, phase displacement and current/ voltage excitation are fully up to international standard requirements. This measuring instrument has been tested by PTB (Physical Technical Federal Authority) in Germany. It fulfills all requirements according to the PTB test rules for measuring instrument transformers and is approved ■ Remote-controlled measurement via IEEE 488 ■ Wide range of accessories (see order specification) ■ Quality control procedures ■ Official metrology stations 0 Current and voltage transformer measurements with a single instrument 0 Fully automatic measurement and digital display of current/voltage ratio errors, phase displacement, test 0 Measurements are possible on instrument transformers of practically any primary and secondary current and voltage ratings 0 Test & standard transformers may have different ratios • Different transformers can be tested using one single standard transformer • Different standard and test transformer ratios are matched without use of an external divider 0 Interactive parameter entry simplifies operation 0 Plain-language display of error messages on a 2 x 16 character dot-matrix 0 Short measurement times, and dynamic averaging 0 Very high accuracy, and low inherent burden 0 Connection for external printer (RS 232 interface) 0 Specifications conform to the standards/ 0 Including RS 232 interface for computer connection and optional IEEE488 GPIB interface COMPLETE MEASUREMENT SYSTEMS HAEFELY HIPOTRONICS also designs and supplies computer controlled current and voltage transformer measurement facilities for specific customer requirements. ■ Type 2767 combined test set for current and voltage instrument transformers ■ Series 4760 standard current transformer (current ■ Type 2763 is a test set for current instrument transformers only ■ Type 2769 is a test set for voltage instrument transformers only ■ Series 4820 standard voltage instrument transformer or series 4860 electronic standard voltage divider with high-voltage capacitive divider ■ Type 3691 or 3695 programmable electronic burden ■ In addition, TETTEX INSTRUMENTS can supply all necessary peripherals (e.g. computer and printer) for external control and data recovery. ■ Series 5260 power supplies, current only or combined HIGH VOLTAGE TEST SOLUTIONS

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TECHNICAL SPECIFICATIONS The type 2767 test set measures transformer ratio errors by the differential method. A major advantage of this is that balancing of winding turns at the differential transformer (current comparator) and compensation via an additional winding enable fully accurate measurement although the test and standard transformer have different ratios. Measurements are initiated simply by entering the rated test and standard transformer data, for which the built-in microprocessor has a particularly convenient man-machine interface. Current or voltage errors, phase displacement,...

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Test circuit for voltage instrument transformer 3. CURRENT AND VOLTAGE TRANSFORMER MEASUREMENT PART current/voltage errors (RATIO ERROR) and Ratio Correction Factor (RCF) Measurement ranges for phase displacement (PHASE ANGLE) Display of [min] or [crad], as required Current measurement ranges (EXCITATION) Display of test specimen current IPX or Isx as absolute values in [A] or [%] of rated current. Voltage measurement ranges (EXCITATION) Display of test specimen voltage UPX or Usx as absolute values in [V] or [%] of rated voltage. Measurement frequency ranges ■ 6-digit LCD measured-value...

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Example of a test certificate: AUTOMATIC INSTRUMENT TRANSFORMER TEST SET — TETTEX INSTRUMENTS MEASUREMENT PROTOCOL Transformer Identification TEST OBJECT : IPXR - 500.0 Ratio error Phase angle ORDER SPECIFICATIONS STANDARD SUPPLY Type 2767 automatic instrument current and voltage transformer test set in a 19" case (including RS 232C printer interface). Ground cable Power cable (please specify with order) Type 2763 is a test set for current instrument transformers only Type 2769 is a test set for voltage instrument transformers only For remote control by external computer: OTHER OPTIONAL...

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2767 4Pages

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2767
4Pages