IEC 60700-1:2015/AMD1:2021

IEC 60700-1 ®
Edition 2.0 2021-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
AM ENDMENT 1
AM ENDEMENT 1
Thyristor valves for high voltage direct current (HVDC) power transmission –
Part 1: Electrical testing
Valves à thyristors pour le transport d'énergie en courant continu à haute
tension (CCHT) –
Partie 1: Essais électriques
IEC 60700-1:2015-07/AMD1:2021-09(en-fr)

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IEC 60700-1 ®
Edition 2.0 2021-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
AM ENDMENT 1
AM ENDEMENT 1
Thyristor valves for high voltage direct current (HVDC) power transmission –

Part 1: Electrical testing
Valves à thyristors pour le transport d'énergie en courant continu à haute

tension (CCHT) –
Partie 1: Essais électriques
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.200 ISBN 978-2-8322-1012-9

‒ 2 ‒ IEC 60700-1:2015/AMD1:2021
© IEC 2021
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
THYRISTOR VALVES FOR HIGH VOLTAGE DIRECT
CURRENT (HVDC) POWER TRANSMISSION –

Part 1: Electrical testing
AMENDMENT 1
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
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Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. IEC shall not be held responsible for identifying any or all such patent rights.
Amendment 1 to IEC 60700-1:2015 has been prepared by subcommittee 22F: Power
electronics for electrical transmission and distribution systems, of IEC technical committee 22:
Power electronic systems and equipment.
The text of this amendment is based on the following documents:
Draft Report on voting
22F/604/CDV 22F/628/RVC
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
© IEC 2021
The language used for the development of this Amendment is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement,
available at www.iec.ch/members_experts/refdocs. The main document types developed by
IEC are described in greater detail at www.iec.ch/standardsdev/publications/.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under 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.
___________
2 Normative references
Replace the existing reference to IEC 61803:1999 and IEC 61803:1999/AMD1:2010, as well
as its associated footnote, with:
IEC 61803:2020, Determination of power losses in high-voltage direct current (HVDC)
converter stations with line-commutated converters
Replace the existing reference to ISO/IEC Guide 25, as well as its associated footnote, with:
ISO/IEC 17025, General requirements for the competence of testing and calibration
laboratories
3 Terms and definitions
3.1.4
valve protective firing
Delete the existing term and definition.

3.2 Valve construction terms
Delete subclause 3.2 and existing terms and definitions 3.2.1 to 3.2.7, without renumbering
subsequent subclauses.
6.3.2 Valve support d.c. voltage test
Replace, in the second sentence of the first paragraph, “50 % of the maximum test voltage”
with “50 % of 1 min test voltage”.

‒ 4 ‒ IEC 60700-1:2015/AMD1:2021
© IEC 2021
Delete, in the second sentence of the first paragraph, “in approximately 10 s”.

6.3.3 Valve support a.c. voltage test
Replace, in the second sentence of the first paragraph, “50 % of the maximum test voltage”
with “50 % of 1 min test voltage”.
Replace, in the second sentence of the first paragraph, “within approximately 10 s” with “in
approximately 10 s”.
7.2 Test object
Replace the existing second paragraph with the following new paragraph:
Individual valves may have to be short-circuited depending on the configuration of the MVU
and objectives of the tests. The stresses on the different valves in the MVU depend on
whether those valves belong to the same phase or to different phases.

7.3.1 MVU d.c. voltage test to earth
Replace, in the first sentence of the second paragraph, “50 % of the maximum test voltage”
with “50 % of 1 min test voltage”.
Delete in the first sentence of the second paragraph “in approximately 10 s”.

7.3.4 MVU lightning impulse test
Replace the existing last paragraph by the following new paragraph:
Subject to agreement between the purchaser and supplier, the MVU lightning impulse test
need not be performed, if it can be shown by other means that:
a) the external air clearances to other valves and to earth are adequate for the lightning
impulse voltage withstand level required, and
a) the lightning impulse withstand between any two terminals of the MVU is adequately
demonstrated by other tests.
8.1 Purpose of tests
Add, at the end of the existing subclause, the following new paragraph:
It should be also noted that the atmospheric correction is not needed in dielectric tests
between valve terminals. However, for valves installed at an altitude exceeding 1 000 m the
valve internal air clearance shall be verified by additional tests under the atmospheric
corrected test voltages. Thyristors and snubber circuits can be replaced by insulating blocks
in these tests.
© IEC 2021
8.3.1 Valve d.c. voltage test
Replace, in the first sentence of the second paragraph, “50 % of the maximum test voltage”
with “50 % of 1 min test voltage”.
Replace, in the first sentence of the second paragraph, “within approximately 10 s” with “in
approximately 10 s”.
Replace the existing formula with:
U = ±U × k
tdv dn 7
8.3.2 Valve a.c. voltage test
Replace, in the second sentence of the first paragraph, “50 % of the maximum test voltage”
with “50 % o
...