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Instrument transformers. Three-phase inductive voltage transformers having Um up to 52kV
:
Available format(s): Hardcopy, PDF
Withdrawn date: 13-08-2019
Language(s): English
Published date: 30-05-2008
Publisher: British Standards Institution
1 General 1.1 Scope 1.2 Normative references2 Definitions3 General requirements4 Normal and special service conditions5 Ratings 5.1 Standard values of rated voltages 5.2 Standard values of rated output 5.3 Standard values of rated voltage factor 5.4 Limits of temperature rise6 Design requirements 6.1 Insulation requirements 6.2 Short-circuit withstand capability7 Classification of tests8 Type tests 8.1 Temperature-rise tests 8.2 Short-circuit withstand capability test 8.3 Impulse test on primary winding 8.4 Wet test for outdoor type transformers9 Routine tests 9.1 Verification of terminal markings 9.2 Power frequency tests on primary winding and partial discharge measurement 9.3 Power-frequency tests between section and on secondary windings10 Special test11 Markings 11.1 Rating plate and markings 11.2 Terminal markings12 Accuracy requirements for three-phase inductive measuring voltage transformers 12.1 Accuracy class designation for measuring voltage transformers 12.2 Limits of voltage error and phase displacement for measuring voltage transformers 12.3 Type test for accuracy of measuring voltage transformers 12.4 Routine test for accuracy of measuring voltage transformers 12.5 Markings of the rating plate of three-phase measuring voltage transformer13 Additional requirements for three-phase inductive protective voltage transformers 13.1 Accuracy class designation for protective voltage transformers 13.2 Limits of voltage error and phase displacement for protective voltage transformers 13.3 Rated voltages for secondary windings intended to produce a residual voltage 13.4 Output for secondary windings intended to produce a residual voltage 13.5 Accuracy class for secondary windings intended to produce a residual voltage 13.6 Type test for protective voltage transformers 13.7 Routine test for protective transformers 13.8 Markings of the rating plate of a three-phase protective voltage transformerBibliography
Defines the requirements and tests for new three-phase voltage transformers with U[m] up to 52 kV and frequencies from 15 Hz to 100 Hz, for use with electrical instruments or electrical protective devices.
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