BS EN 60871-1:2014
$198.66
Shunt capacitors for a.c. power systems having a rated voltage above 1 000 V – General
| Published By | Publication Date | Number of Pages |
| BSI | 2014 | 60 |
This part of IEC 60871 is applicable to both capacitor units and capacitor banks intended to be used, particularly, for power-factor correction of a.c. power systems having a rated voltage above 1 000 V and frequencies of 15 Hz to 60 Hz.
This part of IEC 60871 also applies to capacitors intended for use in power filter circuits. Additional definitions, requirements and tests for filter capacitors are given in Annex B.
Additional requirements for capacitors protected by internal fuses as well as requirements for the internal fuses are given in IEC 60871‑4 .
Requirements for capacitors to be protected by external fuses, as well as requirements for the same, are given in Annex C.
This standard does not apply to capacitors of the self-healing metallized dielectric type.
The following capacitors are excluded from this part of IEC 60871 :
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capacitors for inductive heat-generating plants operating at frequencies between 40 Hz and 24 000 Hz ( IEC 60110‑1 );
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series capacitors for power systems (see the IEC 60143 series);
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capacitors for motor applications and the like (see the IEC 60252 series);
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coupling capacitors and capacitor dividers ( IEC 60358 );
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shunt capacitors for a.c. power systems having rated voltage up to and including 1 000 V (see the IEC 60831 and IEC 60931 series);
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small a.c. capacitors to be used for fluorescent and discharge lamps ( IEC 61048 and IEC 61049 );
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capacitors to be used in power electronic circuits ( IEC 61071 );
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capacitors for microwave ovens ( IEC 61270‑1 );
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capacitors for suppression of radio interference;
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capacitors intended for use with a.c. voltage superimposed on d.c. voltage.
Accessories such as insulators, switches, instrument transformers, external fuses, etc. are in accordance with the relevant IEC standards.
The object of this part of IEC 60871 is as follows:
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to formulate uniform rules regarding the performance and rating of units and banks, and the testing of units;
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to formulate specific safety rules;
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to provide a guide for installation and operation.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 6 | English CONTENTS |
| 10 | 1 Scope |
| 11 | 2 Normative references 3 Terms and definitions |
| 14 | 4 Service conditions 4.1 Normal service conditions Tables Table 1 – Letter symbols for upper limit of temperature range |
| 15 | 4.2 Unusual service conditions 5 Quality requirements and tests 5.1 General 5.2 Test conditions 6 Classification of tests 6.1 General 6.2 Routine tests |
| 16 | 6.3 Type tests 6.4 Acceptance tests 6.5 Endurance test (special test) 7 Capacitance measurement (routine test) 7.1 Measuring procedure |
| 17 | 7.2 Capacitance tolerances 8 Measurement of the tangent of the loss angle (tan δ ) of the capacitor (routine test) 8.1 Measuring procedure |
| 18 | 8.2 Loss requirements 8.3 Losses in external fuses 9 Voltage test between terminals (routine test) 9.1 General 9.2 AC test 9.3 DC test 10 AC voltage test between terminals and container (routine test) |
| 19 | 11 Test of internal discharge device (routine test) 12 Sealing test (routine test) 13 Thermal stability test (type test) 13.1 General 13.2 Measuring procedure |
| 20 | 14 Measurement of the tangent of the loss angle (tan δ ) of the capacitor at elevated temperature (type test) 14.1 Measuring procedure 14.2 Requirements Table 2 – Ambient air temperature for the thermal stability test |
| 21 | 15 Voltage tests between terminals and container (type tests) 15.1 AC voltage test between terminals and container 15.2 Lightning impulse test between terminals and container |
| 22 | 16 Overvoltage test (type test) 16.1 General 16.2 Conditioning of the sample before the test 16.3 Test procedure |
| 23 | 16.4 Acceptance criteria 16.5 Validity of test 16.5.1 General 16.5.2 Element design 16.5.3 Test unit design 16.5.4 Waveform of overvoltage |
| 24 | 17 Short-circuit discharge test (type test) 18 Insulation levels 18.1 Standard insulation values Figures Figure 1 – Time and amplitude limits for an overvoltage period |
| 25 | 18.2 General requirements 18.2.1 General 18.2.2 Adjacent insulating components and equipment 18.2.3 Capacitors insulated from ground 18.2.4 Capacitors with neutral connected to ground |
| 26 | 18.3 Test between terminals and container of capacitor units 18.4 Capacitors in single-phase systems |
| 27 | Table 3 – Standard insulation levels for range I (1 kV < Um <245 kV) |
| 28 | Table 4 – Standard insulation levels for range II (Um > 245 kV) |
| 29 | 19 Overloads – Maximum permissible voltage 19.1 Long duration voltages 19.2 Switching overvoltages 20 Overloads – Maximum permissible current Table 5 – Admissible voltage levels in service |
| 30 | 21 Safety requirements for discharge devices 22 Safety requirements for container connections 23 Safety requirements for protection of the environment 24 Other safety requirements |
| 31 | 25 Markings of the capacitor unit 25.1 Rating plate 25.2 Standardized connection symbols 25.3 Warning plate |
| 32 | 26 Markings of the capacitor bank 26.1 Instruction sheet or rating plate 26.2 Warning plate 27 Guide for installation and operation 27.1 General 27.2 Choice of the rated voltage |
| 33 | 27.3 Operating temperature 27.3.1 General 27.3.2 Installation |
| 34 | 27.3.3 High ambient air temperature 27.4 Special service conditions 27.5 Overvoltages 27.5.1 General |
| 35 | 27.5.2 Restriking of switches 27.5.3 Lightning 27.5.4 Motor self-excitation 27.5.5 Star-delta starting 27.5.6 Capacitor unit selection 27.6 Overload currents 27.6.1 Continuous overcurrents |
| 36 | 27.6.2 Transient overcurrents 27.7 Switching and protective devices 27.7.1 Withstand requirements |
| 37 | 27.7.2 Restrike-free circuit-breakers 27.7.3 Relay settings |
| 38 | 27.8 Choice of insulation levels 27.8.1 General 27.8.2 Altitudes exceeding 1 000 m 27.8.3 Influence of the capacitor itself Table 6 – Insulation requirements |
| 39 | Figure 2 – Bank isolated from ground Figure 3 – Bank isolated from ground (containers connected to ground) |
| 40 | 27.8.4 Overhead ground wires 27.9 Choice of creepage distances and air clearance 27.9.1 Creepage distance Figure 4 – Bank connected to ground Table 7 – Specific creepage distances |
| 41 | 27.9.2 Air clearances |
| 42 | Table 8 – Correlation between standard lightning impulse withstand voltages and minimum air clearances (Table A.1 from IEC 60071-2:1996) |
| 43 | 27.10 Capacitors connected to systems with audio-frequency remote control Figure 5 – Air clearance versus AC withstand |
| 44 | Annex A (normative) Precautions to be taken to avoid pollution of the environment by polychlorinated biphenyls |
| 45 | Annex B (normative) Additional definitions, requirements and tests for power filter capacitors |
| 47 | Annex C (normative) Test requirements and application guide for external fuses and units to be externally fused C.1 General C.2 Terms and definitions C.3 Performance requirements C.4 Tests C.4.1 Tests on fuses C.4.2 Type tests on capacitor containers |
| 48 | C.5 Guide for coordination of fuse protection C.5.1 General C.5.2 Protection sequence C.6 Choice of fuses C.6.1 General |
| 49 | C.6.2 Non current-limiting fuses C.6.3 Current-limiting fuses C.7 Information needed by the user of the fuses |
| 50 | Annex D (informative) Formulae for capacitors and installations D.1 Computation of the output of three-phase capacitors from three single-phase capacitance measurements D.2 Resonant frequency D.3 Voltage increase |
| 51 | D.4 Inrush transient current D.4.1 Switching in of single capacitor bank D.4.2 Switching on of a bank in parallel with energized bank(s) D.5 Discharge resistance in single-phase unit D.6 Discharge time to 10 % of rated voltage |
| 53 | Annex E (informative) Capacitor bank fusing and unit arrangement E.1 General E.2 Internally fused capacitor bank E.3 Externally fused capacitor bank E.4 Fuseless capacitor bank |
| 54 | Figure E.1 – Typical connections between capacitor units |
| 55 | Figure E.2 – Typical connections between elements within a capacitor unit |
| 56 | Bibliography |
