BS EN 60044-1:1999:2003 Edition
$189.07
Instrument transformers – Current transformers
| Published By | Publication Date | Number of Pages |
| BSI | 2003 | 50 |
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 1 | BRITISH STANDARD |
| 2 | National foreword |
| 4 | Foreword Foreword to amendment A1 Foreword to amendment A2 |
| 5 | Contents |
| 7 | 1 General |
| 8 | 2 Definitions 2.1 General definitions 2.1.1 instrument transformer 2.1.2 current transformer 2.1.3 primary winding 2.1.4 secondary winding 2.1.5 secondary circuit 2.1.6 rated primary current 2.1.7 rated secondary current 2.1.8 actual transformation ratio 2.1.9 rated transformation ratio |
| 9 | 2.1.10 current error (ratio error) 2.1.11 phase displacement 2.1.12 accuracy class 2.1.13 burden 2.1.14 rated burden 2.1.15 rated output 2.1.16 highest voltage for equipment 2.1.17 highest voltage of a system 2.1.18 rated insulation level |
| 10 | 2.1.19 isolated neutral system 2.1.20 solidly earthed neutral system 2.1.21 impedance earthed (neutral) system 2.1.22 resonant earthed (neutral) system 2.1.23 earth fault factor 2.1.24 earthed neutral system 2.1.25 exposed installation 2.1.26 non-exposed installation 2.1.27 rated frequency |
| 11 | 2.1.28 rated short-time thermal current 2.1.29 rated dynamic current 2.1.30 rated continuous thermal current 2.1.31 exciting current 2.1.32 composite error 2.1.33 rated resistive burden 2.1.34 secondary winding resistance 2.1.35 multi-ratio current transformer |
| 12 | 2.2 Additional definitions for measuring current transformers 2.2.1 measuring current transformer 2.2.2 rated instrument limit primary current 2.2.3 instrument security factor 2.2.4 secondary limiting e.m.f 2.3 Additional definitions for protective current transformers 2.3.1 protective current transformer 2.3.2 rated accuracy limit primary current 2.3.3 accuracy limit factor 2.3.4 secondary limiting e.m.f. 2.3.5 class PR protective current transformer 2.3.6 saturation flux |
| 13 | 2.3.7 remanent flux 2.3.8 remanence factor 2.3.9 rated secondary loop time constant 2.3.10 excitation characteristic 2.3.11 class PX protective current transformer 2.3.12 rated knee point e.m.f. 2.3.13 rated turns ratio 2.3.14 turns ratio error 2.3.15 dimensioning factor |
| 14 | 3 Normal and special service conditions 3.1 Normal service conditions 3.2 Special service conditions |
| 15 | 3.3 System earthing 4 Ratings 4.1 Standard values of rated primary currents 4.2 Standard values of rated secondary currents 4.3 Rated continuous thermal current |
| 16 | 4.4 Standard values of rated output 4.5 Short-time current ratings 4.6 Limits of temperature rise |
| 17 | 5 Design requirements 5.1 Insulation requirements |
| 18 | Table 4 |
| 19 | Table 5 |
| 21 | Table 16 5.2 Mechanical requirements |
| 22 | 6 Classification of tests 6.1 Type tests 6.2 Routine tests 6.3 Special tests |
| 23 | 7 Type tests 7.1 Short-time current tests 7.2 Temperature-rise test 7.3 Impulse tests on primary winding |
| 24 | 7.4 Wet test for outdoor type transformers |
| 25 | 7.5 Radio interference voltage measurement |
| 26 | 8 Routine tests 8.1 Verification of terminal markings 8.2 Power-frequency withstand tests on primary windings and partial discharge measurement 8.3 Power-frequency withstand tests between sections of primary and secondary windings and on sec… |
| 27 | 8.4 Inter-turn overvoltage test 9 Special tests 9.1 Chopped impulse test on primary winding |
| 28 | 9.2 Measurement of capacitance and dielectric dissipation factor Table 9 9.3 Mechanical tests |
| 29 | 9.4 Transmitted overvoltages measurement 10 Markings 10.1 Terminal markings — General rules |
| 30 | 10.2 Rating plate markings |
| 31 | 11 Additional requirements for measuring current transformers 11.1 Accuracy class designation for measuring current transformers 11.2 Limits of current error and phase displacement for measuring current transformers |
| 32 | 11.3 Extended current ratings Table 11 Table 12 Table 13 11.4 Type tests for accuracy of measuring current transformers 11.5 Routine tests for accuracy of measuring current transformers |
| 33 | 11.6 Instrument security factor 11.7 Marking of the rating plate of a measuring current transformer 12 Additional requirements for protective current transformers 12.1 Standard accuracy limit factors 12.2 Accuracy classes for protective current transformer 12.3 Limits of errors for protective current transformers |
| 34 | 12.4 Type and routine tests for current error and phase displacement of protective current transf… 12.5 Type tests for composite error 12.6 Routine tests for composite error 12.7 Marking of the rating plate of a protective current transformer |
| 35 | Table 14 13 Additional requirements for class PR protective current transformers 13.1 Standard accuracy limit factors 13.2 Accuracy classes for class PR protective current transformers 13.3 Limits of error for class PR protective current transformers Table 15 13.4 Type and routine tests for current error and phase displacement of class PR protective curre… |
| 36 | 13.5 Marking of rating plate of class PR current transformers 14 Additional requirements for class PX protective current transformers 14.1 Specification of performance for class PX protective current transformers 14.2 Insulation requirements for class PX protective current transformers 14.3 Type tests for class PX protective current transformers |
| 37 | 14.4 Routine tests for class PX protective current transformers 14.5 Marking of rating plate of class PX current transformers |
| 38 | Figure 1 |
| 39 | Figure 2 Figure 3 |
| 40 | Figure 4 Figure 5 |
| 41 | Figure 6 Figure 7 |
| 42 | Figure 8 |
| 43 | Figure 9 |
| 44 | Annex A (normative) Protective current transformers A.1 Vector diagram A.2 Turns correction A.3 The error triangle A.4 Composite error |
| 45 | A.5 Direct test for composite error A.6 Alternative method for the direct measurement of composite error |
| 46 | A.7 Use of composite error |
| 48 | Annex B (informative) Multiple chopped impulse test |
| 49 | Annex ZA (normative) Normative references to international publications with their corresponding European … |
