IEC_60185-1987_scan.pdf

185IEC1987-3-CONTENTSFOREWORD.PREFACECHAPTER I;GENERAL REQUIREMENTS APPLICABLETO ALL CURRENT TRANSFORMERSSECTION ONE-GENERAL1.Scope.2.Service conditions.93.Definitions.11SECTION TWO-RATING AND PERPORMANCE REQUIREMENTS APPLICABLE TO ALL CURRENT TRANSFORMERS17(4.Standard values of rated primary current.5.Standard values of rated secondary current.176.Rated continuous thermal current.177.Standard values of rated output.178.Short-time current ratings.199.Limits of temperature rise.1910.Insulation requirements.21SECTION THREE-TESTS-GENERAL11.Classification of tests.33SECTION FOUR-TYPE TESTS12.Short-time current tests.3513.Temperature-rise test.3714.Impulse tests on primary windings.3715.Wet test for outdoor type transformers.41SECTION FIVE-ROUTINE TESTS16.Verification of terminal markings.17.Power-frequency tests on primary windings and measurement of partial discharges.18.Power-frequency tests between sections of primary and secondary windings and on secondary windings.4319.Test of interturn insulation.SECTION SIX-SPECIAL TESTS20.Chopped lightning-impulse test on primary windings.4521.Measurement of dielectric dissipation factor.45SECTION SEVEN-MARING22.Terminal markings-General rules.4523.Rating plate markings.47