IEC 60871-1:2014 ED4

Shunt capacitors for a.c. power systems having a rated voltage above 1 000 V - Part 1: General

IEC 60871-1:2014 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. The object of this part of IEC 60871 is as follows:
- to formulate uniform rules regarding the performance and rating of units and banks, and the testing of units; to formulate specific safety rules;
- to provide a guide for installation and operation. This fourth edition cancels and replaces the third edition published in 2005. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- the overvoltage cycling test has been moved to this standard from the IEC 60871-2;
- the ranges of the standardized values of the highest voltage for equipment have been modified;
- for installations installed on altitudes above 1 000 m a correction factor to all insulation requirements has been introduced;
- new standard insulation tables have been defined. Keywords: capacitor units and capacitor banks, power filter circuits

Condensateurs shunt pour réseaux à courant alternatif de tension assignée supérieure à 1 000 V - Partie 1: Généralités

L'IEC 60871-1:2014 est applicable aux condensateurs unitaires et aux batteries de condensateurs destinés plus particulièrement à la correction du facteur de puissance des réseaux à courant alternatif de tension assignée supérieure à 1 000 V et de fréquence comprise entre 15 Hz et 60 Hz. Cette partie de l'IEC 60871 est également applicable aux condensateurs destinés à être utilisés pour le filtrage dans les circuits de puissance. La présente partie de l'IEC 60871 a pour objet:
- de formuler des règles uniformes pour les performances et les caractéristiques assignées des condensateurs et des batteries, et pour les essais des condensateurs unitaires;
- de formuler des règles spécifiques de sécurité;
- de servir de guide d'installation et d'exploitation. Cette quatrième édition annule et remplace la troisième édition parue en 2005. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
- l'essai de tenue aux surtensions a été supprimé de l'IEC 60871-2 et intégré dans la présente norme;
- les plages des valeurs normalisées de la tension la plus élevée pour le matériel ont été modifiées;
- pour les installations situées à des altitudes supérieures à 1 000 m, un facteur de correction à toutes les exigences d'isolation a été introduit;
- de nouveaux tableaux d'isolement normalisé ont été définis. Mots clés: condensateurs unitaires et aux batteries de condensateurs, filtrage dans les circuits de puissance

General Information

• Status: Published
• Publication Date: 21-May-2014
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 29.240.99 - Other equipment related to power transmission and distribution networks
• ICS: 31.060.70 - Power capacitors
• Technical Committee: TC 33 - Power capacitors and their applications
• Drafting Committee: MT 19 - TC 33/MT 19
• Current Stage: PPUB - Publication issued
• Start Date: 15-Jun-2014
• Completion Date: 22-May-2014

Standards Content (Sample)

IEC 60871-1
®

Edition 4.0 2014-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside


Shunt capacitors for a.c. power systems having a rated voltage above 1 000 V –
Part 1: General

Condensateurs shunt pour réseaux à courant alternatif de tension assignée
supérieure à 1 000 V –
Partie 1: Généralités

IEC 60871-1:2014-05(en-fr)

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IEC 60871-1

®


Edition 4.0 2014-05




INTERNATIONAL



STANDARD




NORME



INTERNATIONALE
colour

inside










Shunt capacitors for a.c. power systems having a rated voltage above 1 000 V –

Part 1: General




Condensateurs shunt pour réseaux à courant alternatif de tension assignée

supérieure à 1 000 V –

Partie 1: Généralités















INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE

PRICE CODE
INTERNATIONALE

CODE PRIX XA


ICS 29.240.99; 31.060.70 ISBN 978-2-8322-1580-7



Warning! Make sure that you obtained this publication from an authorized distributor.

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– 2 – IEC 60871-1:2014 © IEC 2014
CONTENTS

FOREWORD . 6
1 Scope . 8
2 Normative references . 9
3 Terms and definitions . 9
4 Service conditions . 12
4.1 Normal service conditions . 12
4.2 Unusual service conditions . 13
5 Quality requirements and tests . 13
5.1 General . 13
5.2 Test conditions . 13
6 Classification of tests. 13
6.1 General . 13
6.2 Routine tests. 13
6.3 Type tests . 14
6.4 Acceptance tests . 14
6.5 Endurance test (special test) . 14
7 Capacitance measurement (routine test). 14
7.1 Measuring procedure . 14
7.2 Capacitance tolerances . 15
8 Measurement of the tangent of the loss angle (tan δ) of the capacitor (routine test) . 15
8.1 Measuring procedure . 15
8.2 Loss requirements . 16
8.3 Losses in external fuses . 16
9 Voltage test between terminals (routine test) . 16
9.1 General . 16
9.2 AC test . 16
9.3 DC test . 16
10 AC voltage test between terminals and container (routine test) . 16
11 Test of internal discharge device (routine test) . 17
12 Sealing test (routine test) . 17
13 Thermal stability test (type test) . 17
13.1 General . 17
13.2 Measuring procedure . 17
14 Measurement of the tangent of the loss angle (tan δ) of the capacitor at elevated
temperature (type test) . 18
14.1 Measuring procedure . 18
14.2 Requirements . 18
15 Voltage tests between terminals and container (type tests) . 19
15.1 AC voltage test between terminals and container . 19
15.2 Lightning impulse test between terminals and container . 19
16 Overvoltage test (type test) . 20
16.1 General . 20
16.2 Conditioning of the sample before the test . 20
16.3 Test procedure . 20

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IEC 60871-1:2014 © IEC 2014 – 3 –
16.4 Acceptance criteria . 21
16.5 Validity of test . 21
16.5.1 General . 21
16.5.2 Element design . 21
16.5.3 Test unit design . 21
16.5.4 Waveform of overvoltage . 21
17 Short-circuit discharge test (type test) . 22
18 Insulation levels . 22
18.1 Standard insulation values . 22
18.2 General requirements . 23
18.2.1 General . 23
18.2.2 Adjacent insulating components and equipment . 23
18.2.3 Capacitors insulated from ground . 23
18.2.4 Capacitors with neutral connected to ground . 23
18.3 Test between terminals and container of capacitor units . 24
18.4 Capacitors in single-phase systems . 24
19 Overloads – Maximum permissible voltage . 27
19.1 Long duration voltages . 27
19.2 Switching overvoltages . 27
20 Overloads – Maximum permissible current. 27
21 Safety requirements for discharge devices . 28
22 Safety requirements for container connections . 28
23 Safety requirements for protection of the environment . 28
24 Other safety requirements . 28
25 Markings of the capacitor unit . 29
25.1 Rating plate . 29
25.2 Standardized connection symbols . 29
25.3 Warning plate . 29
26 Markings of the capacitor bank . 30
26.1 Instruction sheet or rating plate . 30
26.2 Warning plate . 30
27 Guide for installation and operation . 30
27.1 General . 30
27.2 Choice of the rated voltage . 30
27.3 Operating temperature . 31
27.3.1 General . 31
27.3.2 Installation . 31
27.3.3 High ambient air temperature. 32
27.4 Special service conditions . 32
27.5 Overvoltages . 32
27.5.1 General . 32
27.5.2 Restriking of switches . 33
27.5.3 Lightning . 33
27.5.4 Motor self-excitation . 33
27.5.5 Star-delta starting . 33
27.5.6 Capacitor unit selection . 33
27.6 Overload currents . 33

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– 4 – IEC 60871-1:2014 © IEC 2014
27.6.1 Continuous overcurrents . 33
27.6.2 Transient overcurrents . 34
27.7 Switching and protective devices . 34
27.7.1 Withstand requirements . 34
27.7.2 Restrike-free circuit-breakers . 35
27.7.3 Relay settings . 35
27.8 Choice of insulation levels . 36
27.8.1 General . 36
27.8.2 Altitudes exceeding 1 000 m . 36
27.8.3 Influence of the capacitor itself . 36
27.8.4 Overhead ground wires . 38
27.9 Choice of creepage distances and air clearance . 38
27.9.1 Creepage distance . 38
27.9.2 Air clearances. 39
27.10 Capacitors connected to systems with audio-frequency remote control . 41
Annex A (normative) Precautions to be taken to avoid pollution of the environment by
polychlorinated biphenyls . 42
Annex B (normative) Additional definitions, requirements and tests for power filter
capacitors . 43
Annex C (normative) Test requirements and application guide for external fuses and
units to be externally fused . 45
C.1 General . 45
C.2 Terms and definitions . 45
C.3 Performance requirements . 45
C.4 Tests . 45
C.4.1 Tests on fuses . 45
C.4.2 Type tests on capacitor containers . 45
C.5 Guide for coordination of fuse protection . 46
C.5.1 General . 46
C.5.2 Protection sequence . 46
C.6 Choice of fuses . 46
C.6.1 General . 46
C.6.2 Non current-limiting fuses . 47
C.6.3 Current-limiting fuses. 47
C.7 Information needed by the user of the fuses . 47
Annex D (informative) Formulae for capacitors and installations . 48
D.1 Computation of the output of three-phase capacitors from three single-phase
capacitance measurements . 48
D.2 Resonant frequency . 48
D.3 Voltage increase . 48
D.4 Inrush transient current . 49
D.4.1 Switching in of single capacitor bank . 49
D.4.2 Switching on of a bank in parallel with energized bank(s) . 49
D.5 Discharge resistance in single-phase unit . 49
D.6 Discharge time to 10 % of rated voltage . 49
Annex E (informative) Capacitor bank fusing and unit arrangement. 51
E.1 General . 51
E.2 Internally fused capacitor bank . 51
E.3 Externally fused capacitor bank . 51

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IEC 60871-1:2014 © IEC 2014 – 5 –
E.4 Fuseless capacitor bank . 51
Bibliography . 54

Figure 1 – Time and amplitude limits for an overvoltage period . 22
Figure 2 – Bank isolated from ground . 37
Figure 3 – Bank isolated from ground (containers connected to ground) . 37
Figure 4 – Bank connected to ground . 38
Figure 5 – Air clearance versus AC withstand . 41
Figure E.1 – Typical connections between capacitor units . 52
Figure E.2 – Typical connections between elements within a capacitor unit . 53

Table 1 – Letter symbols for upper limit of temperature range . 12
Table 2 – Ambient air temperature for the thermal stability test . 18
Table 3 – Standard insulation levels for range I (1 kV < U <245 kV) . 25
m
Table 4 – Standard insulation levels for range II (U > 245 kV) . 26
m
Table 5 – Admissible voltage levels in service . 27
Table 6 – Insulation requirements . 36
Table 7 – Specific creepage distances . 38
Table 8 – Correlation between standard lightning impulse withstand voltages and
minimum air clearances (Table A.1 from IEC 60071-2:1996) . 40

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– 6 – IEC 60871-1:2014 © IEC 2014
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

SHUNT CAPACITORS FOR AC POWER SYSTEMS
HAVING A RATED VOLTAGE ABOVE 1 000 V –

Part 1: General

FOREWORD
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International Standard IEC 60871-1 has been prepared by IEC technical committee 33: Power
capacitors and their applications.
This fourth edition cancels and replaces the third edition published in 2005. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) the overvoltage cycling test has been moved to this standard from the IEC 60871-2;
b) the ranges of the
...