IEC PAS 60099-7:2004

Surge arresters - Part 7: Glossary of terms and definitions from IEC publications 60099-1, 60099-4, 60099-6, 61643-1, 61643-12, 61643-21, 61643-311, 61643-321, 61643-331 and 61643-341

Provides a list of terms and definitions relative to IEC publications from IEC technical committee 37: Surge Arresters, and subcommittees 37A: Surge protective devices, and 37B: Surge protective components, current at the date of this publication.

General Information

• Status: Withdrawn
• Publication Date: 26-Apr-2004
• Withdrawal Date: 10-Jun-2019
• ICS: 01.040.29 - Electrical engineering (Vocabularies)
• ICS: 29.240.10 - Substations. Surge arresters
• Technical Committee: TC 37 - Surge arresters
• Drafting Committee: WG 11 - TC 37/WG 11
• Current Stage: WPUB - Publication withdrawn
• Start Date: 11-Jun-2019
• Completion Date: 11-Jun-2019

Standards Content (Sample)

PUBLICLY
IEC
AVAILABLE
PAS 60099-7
SPECIFICATION
First edition
2004-04
Surge arresters –
Part 7:
Glossary of terms and definitions
from IEC publications 60099-1, 60099-4,
60099-6, 61643-1, 61643-12, 61643-21,
61643-311, 61643-321, 61643-331
and 61643-341
Reference number
IEC/PAS 60099-7:2004(E)
Publication numbering
As from 1 January 1997 all IEC publications are issued with a designation in the
60000 series. For example, IEC 34-1 is now referred to as IEC 60034-1.

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edition numbers 1.0, 1.1 and 1.2 refer, respectively, to the base publication, the
base publication incorporating amendment 1 and the base publication incorporating
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PUBLICLY
IEC
AVAILABLE
PAS 60099-7
SPECIFICATION
First edition
2004-04
Surge arresters –
Part 7:
Glossary of terms and definitions
from IEC publications 60099-1, 60099-4,
60099-6, 61643-1, 61643-12, 61643-21,
61643-311, 61643-321, 61643-331
and 61643-341
© IEC 2004 ⎯ Copyright - all rights reserved
No part of this publication may be reproduced or utilized in any form or by any means, electronic or
mechanical, including photocopying and microfilm, without permission in writing from the publisher.
International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland
Telephone: [phone] Telefax: [phone] E-mail: [e-mail] Web: www.iec.ch
PRICE CODE
Commission Electrotechnique Internationale
XA
International Electrotechnical Commission
Международная Электротехническая Комиссия
For price, see current catalogue

– 2 – PAS 60099-7 © IEC:2004 (E)

CONTENTS
FOREWORD.3

1 Scope .4

2 Surge arresters – Non-linear resistor type gapped surge arresters for a.c. systems

(IEC 60099-1:1991+A1:1999).4

3 Surge arresters – Metal-oxide surge arresters without gaps for a.c. systems (IEC
60099-4:1991+A1:1998+A2:2001).9

4 Surge protective devices connected to low-voltage power distribution systems –
Performance requirements and testing methods (IEC 61643-1:1998+A1:2001).16
5 Low-voltage surge protective devices – Surge protective devices connected to
telecommunications and signalling networks – Performance requirements and
testing methods (IEC 61643-21:2000) .21
6 Components for low-voltage surge protective devices – Specification for gas
discharge tubes (GDT) (IEC 61643-311:2001) .24
7 Components for low-voltage surge protective devices – Specifications for
avalanche breakdown diode (ABD) (IEC 61643-321:2001).26
8 Components for low-voltage surge protective devices – Specification for metal
oxide varistors (MOV) (IEC 61643-331:2001) .28
9 Components for low-voltage surge protective devices – Specification for thyristor
surge suppressors (TSS) (IEC 61643-341:2003).30
10 Low-voltage surge protective devices – Surge protective devices connected to low-
voltage power distribution systems – Selection and application prin-ciples (IEC
61643-12:2002) .40
11 Surge arresters – Surge arresters containing both series and parallel gapped
structures – Rated 52 kV and less (IEC 60099-6:2002).46

PAS 60099-7 © IEC:2004 (E) – 3 –

INTERNATIONAL ELECTROTECHNICAL COMMISSION

____________
SURGE ARRESTERS −
Part 7: Glossary of terms and definitions from IEC publications

60099-1, 60099-4, 60099-6, 61643-1, 61643-12, 61643-21,

61643-311, 61643-321, 61643-331 and 61643-341

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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agreement between the two organizations.
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consensus of opinion on the relevant subjects since each technical committee has representation from all
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3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
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9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
A PAS is a technical specification not fulfilling the requirements for a standard but made

available to the public.
IEC-PAS 60099-7 has been processed by IEC technical committee 37: Surge arresters.
The text of this PAS is based on the This PAS was approved for
following document: publication by the P-members of the
committee concerned as indicated in
the following document
Draft PAS Report on voting
37/291/NP 37/296/RVN
This PAS shall remain valid for an initial maximum period of three years starting from 2004-
05. The validity may be extended for a single three-year period, following which it shall be
revised to become another type of normative document or shall be withdrawn.

– 4 – PAS 60099-7 © IEC:2004 (E)

SURGE ARRESTERS −
Part 7: Glossary of terms and definitions from IEC publications

60099-1, 60099-4, 60099-6, 61643-1, 61643-12, 61643-21,

61643-311, 61643-321, 61643-331 and 61643-341

1 Scope
This PAS compiles a list of terms and definitions relative to IEC publications from IEC
technical committee 37: Surge arresters, and subcommittees 37A: Surge protective devices,
and 37B: Surge protective components, current at the date of this publication.
2 Surge arresters – Non-linear resistor type gapped surge arresters for a.c.
systems (IEC 60099-1:1991+A1:1999)
2.1
*
surge arrester
device designed to protect electrical apparatus from high transient voltage and to limit the
duration and frequently the amplitude of follow-current. The term "surge arrester" includes any
external series gap which is essential for the proper functioning of the device as installed for
service, regardless of whether or not it is supplied as an integral part of the device
NOTE Surge arresters are usually connected between the electrical conductors of a network and earth although
they may sometimes be connected across the windings of apparatus or between electrical conductors.
2.2
non-linear resistor type gapped arrester:
arrester having a single or a multiple spark-gap connected in series with one or more non-
linear resistors
2.3
series gap of an arrester:
intentional gap or gaps between spaced electrodes in series with the non-linear series resistor
or resistors of the arrester
2.4
non-linear series resistor of an arrester
part of the surge arrester which, by its non-linear voltage-current characteristics, acts as a low

resistance to the flow of high discharge currents thus limiting the voltage across the arrester
terminals, and as a high resistance at normal power-frequency voltage thus limiting the
magnitude of follow-current
2.5
section of an arrester
complete, suitably housed part of an arrester including series gaps and non-linear series
resistors in such a proportion as is necessary to represent the behaviour of a complete
arrester with respect to a particular test
2.6
unit of an arrester
completely housed part of an arrester which may be connected in series with other units to
construct an arrester of higher voltage rating. A unit of an arrester is not necessarily a section
of an arrester
———————
*
This type of equipment may be called "surge diverter" in some countries.

PAS 60099-7 © IEC:2004 (E) – 5 –

2.7
pressure-relief device of an arrester

means for relieving internal pressure in an arrester and preventing explosive shattering of the

housing following prolonged passage of follow-current or internal flashover of the arrester

2.8
rated voltage of an arrester
designated maximum permissible r.m.s. value of power-frequency voltage between its

terminals at which it is designated to operate correctly. This voltage may be applied to the

arrester continuously without changing its operating characteristics

2.9
rated frequency of an arrester
frequency of the power system on which the arrester is designed to be used
2.10
disruptive discharge
phenomena associated with the failure of insulation under electrical stress which include a
collapse of voltage and the passage of current; the term applies to electrical breakdown in
solid, liquid and gaseous dielectrics and combinations of these
NOTE A disruptive discharge in a solid dielectric produces permanent loss of electrical strength; in a liquid or
gaseous dielectric the loss may be only temporary.
2.11
puncture
disruptive discharge through a solid
2.12
flashover
disruptive discharge over a solid surface
2.13
sparkover of an arrester
disruptive discharge between the electrodes of the gaps of an arrester
2.14
impulse
unidirectional wave of voltage or current which, without appreciable oscillations, rises rapidly
to a maximum value and falls, usually less rapidly, to zero with small, if any, loops of opposite
polarity
The parameters which define a voltage or current impulse are polarity, peak value, front time,

and time to half-value on the tail
2.15
rectangular impulse
impulse which rises rapidly to a maximum value, remains substantially constant for a specified
period, and then falls rapidly to zero
The parameters which define a rectangular impulse are polarity, peak value, virtual duration
of the peak, and virtual total duration
2.16
peak (crest) value of an impulse
maximum value of voltage or current in an impulse. In case of superimposed oscillations (see
8.3.2, 8.5.2e), and 8.5.3.2c) of IEC 60099-1)

– 6 – PAS 60099-7 © IEC:2004 (E)

2.17
front of an impulse
that part of an impulse which occurs prior to the peak

2.18
ta
...