BS EN 61869-1:2009:2010 Edition
$198.66
Instrument transformers – General requirements
| Published By | Publication Date | Number of Pages |
| BSI | 2010 | 70 |
This International Standard is applicable to newly manufactured instrument transformers with analogue or digital output for use with electrical measuring instruments or electrical protective devices having rated frequencies from 15 Hz to 100 Hz.
This standard is a product family standard and covers general requirements only. For each kind of instrument transformer the product standard is composed by this standard and the relevant specific standard.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 7 | English CONTENTS |
| 11 | 1 Scope 2 Normative references |
| 12 | 3 Terms and definitions |
| 13 | 3.1 General definitions 3.2 Definitions related to dielectric ratings |
| 15 | 3.3 Definitions related to current ratings 3.4 Definitions related to accuracy |
| 16 | 3.5 Definitions related to other ratings 3.6 Definitions related to gas insulation |
| 17 | 3.7 Index of abbreviations 4 Normal and special service conditions 4.1 General |
| 18 | 4.2 Normal service conditions Tables Table 1 – Temperature categories |
| 19 | 4.3 Special service conditions |
| 20 | 4.4 System earthing 5 Ratings 5.1 General 5.2 Highest voltage for equipment |
| 21 | Table 2 – Rated primary terminal insulation levels for instrument transformers |
| 22 | 5.3 Rated insulation levels Table 3 – Partial discharge test voltages and permissible levels |
| 23 | 5.4 Rated frequency 5.5 Rated output 5.6 Rated accuracy class 6 Design and construction 6.1 Requirements for liquids used in equipment 6.2 Requirements for gases used in equipment |
| 24 | Table 4 – Permissible temporary leakage rates for gas systems |
| 25 | 6.3 Requirements for solid materials used in equipment 6.4 Requirements for temperature rise of parts and components |
| 26 | Table 5 – Limits of temperature rise for various parts, materials and dielectrics of instrument transformers |
| 27 | 6.5 Requirements for earthing of equipment 6.6 Requirements for the external insulation Figures Figure 1 – Altitude correction factor for the temperature rise |
| 28 | Table 6 – Creepage distances |
| 29 | 6.7 Mechanical requirements Figure 2 – Altitude correction factor |
| 30 | 6.8 Multiple chopped impulse on primary terminals 6.9 Internal arc fault protection requirements Table 7 – Static withstand test loads |
| 31 | 6.10 Degrees of protection by enclosures Table 8 – Arc fault duration and performance criteria |
| 32 | 6.11 Electromagnetic Compatibility (EMC) |
| 33 | Table 9 – Transmitted overvoltage limits |
| 34 | 6.12 Corrosion Figure 3 – Transmitted overvoltages measurement: Test impulse waveforms |
| 35 | 6.13 Markings 6.14 Fire hazard 7 Tests 7.1 General |
| 36 | Table 10 – List of tests |
| 37 | 7.2 Type tests Table 11 – Gas type and pressure during type, routine and special tests |
| 41 | Figure 4 – RIV measuring circuit |
| 43 | 7.3 Routine tests |
| 44 | Figure 5 – Test circuit for partial discharge measurement Figure 6 – Alternative circuit for partial discharge measurement |
| 45 | Figure 7 – Example of balanced test circuit for partial discharge measurement Figure 8 – Example of calibration circuit for partial discharge measurement |
| 47 | 7.4 Special tests |
| 50 | Figure 9 – Transmitted overvoltages measurement: general test configuration Figure 10 – Transmitted overvoltages measurement: test circuit and GIS Test configuration (CT) |
| 52 | Table 12 – Modalities of application of the test loads to be applied to the line primary terminals |
| 54 | 7.5 Sample tests |
| 55 | 8 Rules for transport, storage, erection, operation and maintenance 9 Safety 10 Influence of products on the natural environment |
| 56 | Annex A (normative) Identification of test specimen |
| 57 | Annex B (informative) Rules for transport, storage, erection, operation and maintenance |
| 62 | Annex C (informative) Fire hazard Table C.1 – Fire hazard of electrotechnical products |
| 63 | Annex D (informative) Sample test |
| 64 | Bibliography |
