IEC 60358-4:2018

Coupling capacitors and capacitor dividers - Part 4: DC and AC single-phase capacitor dividers

IEC 60358-4:2018 applies to DC or AC single-phase capacitor-dividers connected between line and ground used for manufacturing Voltage Transformers as well as for other applications. IEC 60358-4:2018 is to be used in conjunction with the latest edition of IEC 60358-1 and its amendments. IEC 60358-4:2018 was established on the basis of the IEC 60358-1:2012. IEC 60358-4:2018 supplements or modifies the corresponding clauses in IEC 60358-1:2012. This standard cancels and replaces the second edition of IEC 60358 (1990), and constitutes a technical revision.

Condensateurs de couplage et diviseurs capacitifs - Partie 4: Diviseurs capacitifs monophasés en courant continu et en courant alternatif

IEC 60358-4:2018 s'applique aux diviseurs capacitifs monophasés pour courant alternatif ou pour courant continu connectés entre la ligne et la terre utilisés pour la fabrication de transformateurs de tension ainsi que pour d'autres applications.
IEC 60358-4:2018 doit être utilisées conjointement avec IEC 60358-1:2012. IEC 60358-4:2018 a été établie sur la base de IEC 60358-1:2012. IEC 60358 complètent ou modifient les articles correspondants de l'IEC 60358-1:2012.

General Information

• Status: Published
• Publication Date: 02-Jul-2018
• ICS: 29.120.99 - Other electrical accessories
• 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 20 - TC 33/MT 20
• Current Stage: PPUB - Publication issued
• Start Date: 27-Jul-2018
• Completion Date: 03-Jul-2018

Standards Content (Sample)

IEC 60358-4 ®
Edition 1.0 2018-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Coupling capacitors and capacitor dividers –
Part 4: DC or AC single-phase capacitor dividers

Condensateurs de couplage et diviseurs capacitifs –
Partie 4: Diviseurs capacitifs monophasés pour courant alternatif ou pour
courant continu
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IEC 60358-4 ®
Edition 1.0 2018-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Coupling capacitors and capacitor dividers –

Part 4: DC or AC single-phase capacitor dividers

Condensateurs de couplage et diviseurs capacitifs –

Partie 4: Diviseurs capacitifs monophasés pour courant alternatif ou pour

courant continu
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.120.99; 29.240.99; 31.060.70 ISBN 978-2-8322-5863-7

– 2 – IEC 60358-4:2018 © IEC 2018
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Service conditions . 8
5 Ratings . 8
6 Design requirements . 8
7 Test conditions . 10
8 Classification of tests. 10
9 Routine tests . 10
10 Type tests . 12
11 Special tests . 12
12 Marking . 12
Annex 4A (informative) Example of diagram of dividers. 13

Figure 400 – Connection for voltage test on low voltage part . 11
Figure 401 – Different types of dividers . 12
Figure 4A.400 – Example of diagram of dividers . 13

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
COUPLING CAPACITORS AND CAPACITOR DIVIDERS –

Part 4: DC or AC single-phase capacitor dividers

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
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patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 60358-4 has been prepared by IEC technical committee 33: Power
capacitors and their applications.
The text of this International Standard is based on the following documents:
FDIS Report on voting
33/616/FDIS 33/617/RVD
Full information on the voting for the approval of this International Standard can be found in
the report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all Parts in the IEC 60358 series, published under the general title Coupling
capacitors and capacitor dividers, can be found on the IEC website.

– 4 – IEC 60358-4:2018 © IEC 2018
Parts 2 through 4 of IEC 60358 are to be used in conjunction with the latest edition of
IEC 60358-1 and its amendments. They were established on the basis of the first edition
(2012) of that standard.
Parts 2 through 4 of IEC 60358 supplement or modify the corresponding clauses in
IEC 60358-1.
When a particular subclause of Part 1 is not mentioned in Parts 2 through 4, that subclause
applies as far as is reasonable. When this document states “addition”, “modification” or
“replacement”, the relevant text in Part 1 is to be adapted accordingly.
For additional clauses, subclauses, figures, tables or annexes, the following numbering
system is used:
• subclauses, tables and figures which are additional to those in Part 1 are numbered
starting from 200 for Part 2, 300 for Part 3 and 400 for Part 4;
• additional tables or annexes in the remaining Parts are lettered 2A, 2B, 3A, 3B, etc.
• as the notes are integrated into the clauses, their numbering are starting from 1 as usual.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
INTRODUCTION
This series consists of the following Parts:
IEC 60358-1, Coupling capacitors and capacitor dividers – Part 1: General rules
IEC 60358-2, Coupling capacitors and capacitor dividers – Part 2: AC or DC single-phase
coupling capacitor connected between line and ground for power line carrier-frequency (PLC)
application
IEC 60358-3, Coupling capacitors and capacitor dividers – Part 3: AC or DC coupling
capacitor for harmonic-filters applications
IEC 60358-4, Coupling capacitors and capacitor dividers – Part 4: DC or AC single-phase
capacitor dividers
– 6 – IEC 60358-4:2018 © IEC 2018
COUPLING CAPACITORS AND CAPACITOR DIVIDERS –

Part 4: DC or AC single-phase capacitor dividers

1 Scope
This Part 4 of IEC 60358 applies to DC or AC single-phase capacitor-dividers connected
between line and ground used for manufacturing Voltage Transformers as well as for other
applications.
NOTE 1 Diagrams of dividers to which this standard applies are given in Figures 401 and 402 (402.1 and 402.2).
NOTE 2 This standard specifies the basic requirements of the dividers; the requirements of the complete Voltage
Transformers are given in the IEC 61869 series.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their
content constitutes requirements of this document. For dated references, only the edition
cited applies. For undated references, the latest edition of the referenced document (including
any amendments) applies.
IEC 60358-1:2012, Coupling capacitors and capacitor dividers – Part 1: General rules
3 Terms and definitions
Clause 3 of IEC 60358-1:2012 is applicable with the following additional text:
Subclause 3.1.6 is applicable with the following additional Note:
NOTE For DC voltage divider, U include also peak voltage of harmonics.
m
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.400 Voltage divider definitions
3.400.1
voltage divider
device comprising resistors, inductors, capacitors, transformer(s) or a combination of these
components such that, between two points of the device, a desired fraction of the voltage
applied to the device as a whole can be obtained
Note 1 to entry: In this standard, voltage divider consists on HV-part, internal and/or external LV-part.
[SOURCE: IEC 60050-312:2001, 312-02-32]

3.400.2
rated primary voltage
U
pr
value of the primary voltage which appears in the designation of the voltage divider and on
which its performance is based
Note 1 to entry For a divider the performance is everything concerning the measurement behaviour:
transformation ratio, accuracy, burden, input voltage range, etc.
[SOURCE: IEC 60050-321:1986, 321-01-12, modified ("voltage transformer" replaced by
"voltage divider", Note 1 to entry added)]
3.400.3
rated secondary voltage
U
sr
value of the secondary voltage which appears in the designation of the voltage transformer
and on which its performance is based
[SOURCE: IEC 60050-321:1986, 321-01-16]
3.400.4
capacitor voltage divider
C-Divider
voltage divider consisting only of capacitors
[SOURCE: IEC 60050-321:1986, 321-03-15]
3.400.5
R-C voltage divider
RC-Divider
voltage divider consisting capacitors with parallel connected resistors
3.400.6
C-R voltage divider
CR-divider
voltage divider consisting capacitors with series connected resistors
3.400.7
R-C-R voltage divider
RCR-divider
voltage divider consisting capacitors with series & parallel connected resistors
3.400.8
rated capacitance of divider C
R
capacitance value for which the divider has been designed
(resultant capacitance: C = C × C /(C + C ))
R 1 2 1 2
Note 1 to entry: C and C are as presented in Figure 401.
1 2
3.400.9
rated parallel resistance of divider R
PR
resistance value for which the RC- & RCR-voltage divider has been designed
(resultant resistance: R = R + R )
PR P1 P2
Note 1 to entry: R and R are as presented in Figure 401.
P1 P2
– 8 – IEC 60358-4:2018 © IEC 2018
3.400.10
rated series resistance of divider R
SR
resistance value for which the CR- & RCR-voltage divider has been designed
(resultant resistance: R = R + R )
SR S1 S2
Note 1 to entry: R and R are as presented in Figure 401.
S1 S2
3.400.11
high-voltage capacitor
capacitor connected between the high-voltage terminal and the intermediate voltage terminal
of a capacitor divider
SEE: Figures 402.1 to 402.2.
[SOURCE: IEC 60050-436:1990, 436-02-12]
3.400.12
intermediate voltage capacitor
capacitor connected between the intermediate voltage terminal and the low-voltage terminal
of a capacitor divider
SEE: Figures 402.1 to 402.2.
[SOURCE: IEC 60050-436, 436-02-13]
3.400.13
ratio of a capacitor divider (voltage ratio)
ratio of the rated primary voltage applied to the capacitor divider (U ) to the open-circuit
pr
intermediate voltage
Note 1 to entry: This ratio corresponds to the sum of the capacitances of the high voltage and intermediate
voltage capacitors divided by the capacitance of the high voltage capacitor:
(C + C )/C
1 2 1
Note 2 to entry: C and C include the stray capacitances, which are generally negligible.
1 2
[SOURCE: IEC 60050-436:1990, 436-04-05, modified (addition of "(U )", addition of Notes to
pr
entry)]
4 Service conditions
Clause 4 of IEC 60358-1:2012 is applicable, unless otherwise specified in the specific product
standard.
5 Ratings
Clause 5 of IEC 60358-1:2012 is applicable, unless otherwise specified in the specific product
standard.
6 Design requirements
Clause 6 of IEC 60358-1:2012 is applicable, with the following additions and replacements:

6.1 Insulation requirements
6.1.400 AC applications
Subclause 6.1 of IEC 60358-1:2012 is applicable, unless otherwise specified in the specific
product standard.
6.1.401 DC applications
Subclause 6.1 of IEC 60358-1:2012 is applicable with the following replacement for DC
withstand voltage test
For DC application, the DC withstand voltage test is defined with a factor F = 1,5. The voltage
T
shall be applied during one hour in both polarities, unless otherwise specified in the specific
product standard.
DC-test voltage = (F × U ) = 1,5 × U .
T m m
6.2 Other insulation requirements
Subclause 6.2 of IEC 60358-1:2012 is applicable except for the following modifications in
6.2.1 and 6.2.2:
6.2.1 Low voltage terminal not exposed to weather
Replace Subclause 6.2.1 of IEC 60358-1:2012 with the following new subclause:
6.2.1.400 Intermediate voltage terminal and low voltage terminal non exposed to
weather
Intermediate voltage terminal and low voltage terminal shall withstand an AC voltage of 3 kV
against earth terminal, unless otherwise specified in the specific product standard.
If the intermediate voltage is higher than 0,72/√3 kV, the test voltage has to be adapted
according to Table 3 of 60358-1:2012.
6.2.2 Low voltage terminal exposed to weather
Subclause 6.2.2 of IEC 60358-1:2012 is applicable, with the following addition:
6.2.2.400 Intermediate voltage terminal exposed to weather
Intermediate voltage terminal shall withstand the AC voltage test according to Subclause
6.2.2 of IEC 60358-1:2012, unless otherwise specified in the specific product standard.
6.3 Electromagnetic emission requirements – Radio interference voltage (RIV)
Subclause 6.3 of IEC 60358-1:2012 is applicable, with the following modification: Delete
Note 2.
Annex C of IEC 60358-1:2012 is applicable, with the following modification: Delete Note 3.
6.4 Mechanical requirements
Subclause 6.4 of IEC 60358-1:2012 is applicable, unless otherwise specified in the specific
product standards.
– 10 – IEC 60358-4:2018 © IEC 2018
7 Test conditions
Clause 7 of IEC 60358-1:2012 is applicable.
8 Classification of tests
8.1 General
Clause 8 of IEC 60358-1:2012 is applicable.
8.2 Routine tests
Subclause 8.2 of IEC 60358-1:2012 is applicable with the following additions:
8.2.400 Routine tests for voltage divider
Subclause 9.2.400.2 gives supplementary information how to perform the power frequency
withstand voltage test on an intermediate terminal.
The following supplementary tests shall be done:
a) Verification of terminal marking (9.2.400.3)
8.3 Type tests
Subclause 8.3 of IEC 60358-1:2012 is applicable.
8.4 Special tests
Subclause 8.4 of IEC 60358-1:2012 is applicable.
9 Routine tests
Clause 9 of IEC 60358-1:2012 is applicable with the following additions:
9.1 Tightness of the liquid-filled equipment
Subclause 9.1 of IEC 60358-1:2012 is applicable.
NOTE Tightness test for gas insulated equipment is specified in Subclause 9.1.2 of IEC 60358-1:2012.
9.2 Electrical tests
Subclause 9.2 of IEC 60358-1:2012 is applicable, with the following additions:
9.2.400 Electrical tests for divider
9.2.400.1 General
The routine tests on the capacitor part are specified in Subclause 8.2 of IEC 60358-1:2012
with the following modifications:
9.2.400.1.1 Capacitance, tanδ and resistance measurement
The HV-capacitance shall be measured as in Subclause 9.2.2 of IEC 60358-1:2012.
The LV-capacitance can be measured with different methods (for ex: RLC bridge, etc.).

If any resistor component is placed inside:
The HV-resistance shall be measured as in Subclause 9.2.6 of IEC 60358-1:2012.
The LV-resistance can be measured with lower voltages.
9.2.400.1.2 DC withstand test
The test voltages and the duration are defined in Subclause 6.1.401.
Due to temperature reasons, a cooling down period is allowed between both polarities.
This test has to be done before the PD measurement.
NOTE By agreement between purchaser and manufacturer, this test can be replaced by an AC test at DC test
voltage according to Subclause 6.1.401 divided by √2.
9.2.400.2 Routine tests for low voltage device
The low voltage terminal and intermediate voltage terminal may be shorted together and AC
test voltage shall be
...