| PDF Pages<\/th>\n | PDF Title<\/th>\n<\/tr>\n | ||||||
|---|---|---|---|---|---|---|---|
| 1<\/td>\n | BRITISH STANDARD <\/td>\n<\/tr>\n | ||||||
| 2<\/td>\n | National foreword <\/td>\n<\/tr>\n | ||||||
| 4<\/td>\n | Foreword Foreword to amendment A1 Foreword to amendment A2 <\/td>\n<\/tr>\n | ||||||
| 5<\/td>\n | Contents <\/td>\n<\/tr>\n | ||||||
| 7<\/td>\n | 1General 1.1 Scope 1.2 Normative references 2 Definitions 2.1 General definitions <\/td>\n<\/tr>\n | ||||||
| 11<\/td>\n | 2.2 Additional definitions for single-phase inductive protective voltage transformers 3 General requirements 4 Normal and special service conditions 4.1 Normal service conditions Table 1 Temperature categories <\/td>\n<\/tr>\n | ||||||
| 12<\/td>\n | 4.2 Special service conditions <\/td>\n<\/tr>\n | ||||||
| 13<\/td>\n | 4.3 System earthing 5 Ratings 5.1 Standard values of rated voltages 5.2 Standard values of rated output <\/td>\n<\/tr>\n | ||||||
| 14<\/td>\n | 5.3 Standard values of rated voltage factor Table 2 Standard values of rated voltage factors 5.4 Limits of temperature rise <\/td>\n<\/tr>\n | ||||||
| 15<\/td>\n | Table 3 Limits of temperature rise of windings 6 Design requirements 6.1 Insulation requirements <\/td>\n<\/tr>\n | ||||||
| 16<\/td>\n | Table 4 Rated insulation levels for transformer primary windings having highest voltage for equipment Table 5 Rated insulation levels for primary windings having highest voltage for equipment <\/td>\n<\/tr>\n | ||||||
| 17<\/td>\n | Table 6 Power-frequency withstand voltages for transformer primary windings having voltage for equipment Table 7 Partial discharge test voltages and permissible levels <\/td>\n<\/tr>\n | ||||||
| 18<\/td>\n | Table 8 Creepage distances <\/td>\n<\/tr>\n | ||||||
| 19<\/td>\n | Table 14 Transmitted overvoltage limits 6.2 Short-circuit withstand capability 6.3 Mechanical requirements Table 9 Static withstand test loads 7 Classification of tests <\/td>\n<\/tr>\n | ||||||
| 20<\/td>\n | 7.1 Type tests 7.2 Routine tests 7.3 Special tests 8 Type tests 8.1 Temperature-rise test <\/td>\n<\/tr>\n | ||||||
| 21<\/td>\n | 8.2 Short-circuit withstand capability test 8.3 Impulse test on primary winding <\/td>\n<\/tr>\n | ||||||
| 22<\/td>\n | 8.4 Wet test for outdoor type transformers <\/td>\n<\/tr>\n | ||||||
| 23<\/td>\n | 8.5 Radio interference voltage measurement <\/td>\n<\/tr>\n | ||||||
| 24<\/td>\n | 9 Routine tests 9.1 Verification of terminal markings 9.2 Power-frequency withstand tests on primary windings and partial discharge measurement <\/td>\n<\/tr>\n | ||||||
| 25<\/td>\n | 9.3 Power-frequency withstand tests between sections and on secondary windings <\/td>\n<\/tr>\n | ||||||
| 26<\/td>\n | 10 Special tests 10.1 Chopped impulse test on primary winding 10.2 Measurement of capacitance and dielectric dissipation factor 10.3 Mechanical tests <\/td>\n<\/tr>\n | ||||||
| 27<\/td>\n | Table 10 Modalities of application of the test loads to be applied to the line primary terminals 10.4 Transmitted overvoltage measurement <\/td>\n<\/tr>\n | ||||||
| 28<\/td>\n | 11 Markings 11.1 Rating plate markings 11.2 Terminal markings <\/td>\n<\/tr>\n | ||||||
| 29<\/td>\n | 12 Accuracy requirements for single-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 Table 11 Limits of voltage error and phase displacement measuring voltage transformers 12.3 Type tests for accuracy of measuring voltage transformers 12.4 Routine tests for accuracy of measuring voltage transformers 12.5 Marking of the rating plate of a measuring voltage transformer <\/td>\n<\/tr>\n | ||||||
| 30<\/td>\n | 13 Additional requirements for single-phase inductive protective voltage transformers 13.1 Accuracy class designation for protective voltage transformers 13.1.1 Standard accuracy classes for protective voltage transformers 13.2 Limits of voltage error and phase displacement for protective voltage transformers Table 12 Limits of voltage error and phase displacement for protective voltage transformers 13.3 Rated voltages for secondary windings intended to produce a residual voltage Table 13 Rated voltages for secondary windings intended to produce a residual voltage <\/td>\n<\/tr>\n | ||||||
| 31<\/td>\n | 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 tests for protective voltage transformers 13.7 Routine tests for protective voltage transformers 13.8 Marking of the rating plate of a protective voltage transformer <\/td>\n<\/tr>\n | ||||||
| 32<\/td>\n | Figure 1 Altitude correction factor <\/td>\n<\/tr>\n | ||||||
| 33<\/td>\n | Figure 2 Test circuit for partial discharge measurement Figure 3 Alternative circuit for partial discharge measurement <\/td>\n<\/tr>\n | ||||||
| 34<\/td>\n | Figure 4 Example of balanced test circuit for partial discharge measurement Figure 5 Example of calibration circuit for partial discharge measurement <\/td>\n<\/tr>\n | ||||||
| 35<\/td>\n | Figure 6 Single-phase transformer with fully insulated terminals and a single secondary Figure 7 Single-phase transformer with a neutral primary terminal with reduced insulation and a single sec… Figure 8 Three-phase assembly with a single secondary <\/td>\n<\/tr>\n | ||||||
| 36<\/td>\n | Figure 9 Single-phase transformer with two secondaries Figure 10 Three-phase assembly with two secondaries <\/td>\n<\/tr>\n | ||||||
| 37<\/td>\n | Figure 11 Single-phase transformer with one multi-tap secondary Figure 12 Three-phase assembly with one multi-tap secondary <\/td>\n<\/tr>\n | ||||||
| 38<\/td>\n | Figure 13 Single-phase transformer with two multi-tap secondaries Figure 14 Single-phase transformer with one residual voltage winding <\/td>\n<\/tr>\n | ||||||
| 39<\/td>\n | Figure 15 Three-phase transformer with one residual voltage winding <\/td>\n<\/tr>\n | ||||||
| 40<\/td>\n | Figure 16 Example of a typical rating plate Figure 17 Measuring circuit <\/td>\n<\/tr>\n | ||||||
| 41<\/td>\n | Figure 18 Transmitted overvoltages measurement: Test circuit and GIS test set-up Figure 19 Transmitted overvoltages measurement: General test set-up <\/td>\n<\/tr>\n | ||||||
| 42<\/td>\n | Figure 20 Transmitted overvoltages measurement: Test waveforms <\/td>\n<\/tr>\n | ||||||
| 43<\/td>\n | Annex ZA (normative) Normative references to international publications with their corresponding European … <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Instrument transformers – Inductive voltage transformers<\/b><\/p>\n |