High-voltage switchgear and controlgear - Part 206: Voltage presence indicating systems for rated voltages above 1 kV and up to and including 52 kV

IEC 62271-206:2011 is applicable to voltage presence indicating systems (VPIS) incorporated in a.c. switchgear and controlgear covered by IEC 62271-200 or IEC 62271-201. Voltage presence indicating systems are devices used to provide information to operators about the voltage condition of the main circuit of the switchgear in which they are installed. This first edition of IEC 62271-206 cancels and replaces the first edition of IEC 61958. This edition constitutes a minor revision. The main changes with respect of the first edition of IEC 61958 are an actualization of references and the degree of protection which has been changed from IPXXB to IP2X.

Hochspannungs-Schaltgeräte und -Schaltanlagen - Teil 206: Spannungsanzeigesysteme für Bemessungsspannungen über 1 kV bis einschließlich 52 kV

Appareillage à haute tension - Partie 206: Systèmes indicateurs de présence de tension assignées supérieures à 1 kV et inférieures ou égales à 52 kV

La CEI 62271-206:2011 est applicable aux systèmes indicateurs de présence de tension (VPIS) incorporés dans l'appareillage pour courant alternatif conforme à la CEI 62271 200 ou à la CEI 62271-201. Les systèmes indicateurs de présence de tension sont des dispositifs utilisés pour informer l'exploitant sur l'état de tension du circuit principal de l'appareillage dans lequel ils sont installés. Cette première édition de la CEI 62271-206 annule et remplace la première édition de la CEI 61958. Cette édition constitue une révision mineure. Les principaux changements par rapport à l'édition de la CEI 61958 sont l'actualisation des références et le degré de protection qui passe de IPXXB à IPX2.

Sestavi predizdelanih visokonapetostnih stikalnih in krmilnih naprav - 206. del: Sistemi za javljanje prisotnosti napetosti (IEC 62271-206:2011)

Ta del IEC 62271 velja za sisteme za javljanje prisotnosti napetosti (VPIS), vgrajene v izmenične stikalne in krmilne naprave, ki jih zajema IEC 62271-200 ali IEC 62271-201. Sistemi za javljanje prisotnosti napetosti so naprave, ki upravljavcem zagotavljajo informacije o stanju napetosti glavnega vezja stikalnih naprav, v katerih so nameščene. Samo javljanje sistemov VPIS ni dovolj za dokaz, da sistem ni aktiven: če delovni postopki tako zahtevajo, se morajo uporabiti ustrezni detektorji napetosti v skladu z IEC 61243-1, IEC 61243-2 in IEC 61243-5.
Ta standard velja tudi za komparatorje, ki so posebej namenjeni uporabi s sistemi VPIS.

General Information

Status
Published
Publication Date
10-Mar-2011
Current Stage
6060 - Document made available
Completion Date
11-Mar-2011

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SLOVENSKI STANDARD
SIST EN 62271-206:2011
01-maj-2011
1DGRPHãþD
SIST EN 61958:2002
Sestavi predizdelanih visokonapetostnih stikalnih in krmilnih naprav - 206. del:
Sistemi za javljanje prisotnosti napetosti (IEC 62271-206:2011)

High-voltage prefabricated switchgear and controlgear assemblies - Part 206: Voltage

presence indicating systems (IEC 62271-206:2011)
Hochspannungs-Schaltanlagen - Teil 206: Spannungsanzeigesysteme (IEC 62271-
206:2011)
Ensembles préfabriqués d'appareillages haute tension - Partie 206: Systèmes
indicateurs de présence de tension (CEI 62271-206:2011)
Ta slovenski standard je istoveten z: EN 62271-206:2011
ICS:
13.260 9DUVWYRSUHGHOHNWULþQLP Protection against electric
XGDURP'HORSRGQDSHWRVWMR shock. Live working
29.130.10 Visokonapetostne stikalne in High voltage switchgear and
krmilne naprave controlgear
SIST EN 62271-206:2011 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN 62271-206:2011
---------------------- Page: 2 ----------------------
SIST EN 62271-206:2011
EUROPEAN STANDARD
EN 62271-206
NORME EUROPÉENNE
March 2011
EUROPÄISCHE NORM
ICS 29.130.10 Supersedes EN 61958:2001
English version
High-voltage switchgear and controlgear -
Part 206: Voltage presence indicating systems for rated voltages above
1 kV and up to and including 52 kV
(IEC 62271-206:2011)
Appareillage à haute tension - Hochspannungs-Schaltgeräte und -
Partie 206: Systèmes indicateurs de Schaltanlagen -
présence de tension assignées Teil 206: Spannungsanzeigesysteme für
supérieures à 1 kV et inférieures ou Bemessungsspannungen über 1 kV bis
égales à 52 kV einschließlich 52 kV
(CEI 62271-206:2011) (IEC 62271-206:2011)

This European Standard was approved by CENELEC on 2011-03-03. CENELEC members are bound to comply

with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard

the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on

application to the Central Secretariat or to any CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any other

language made by translation under the responsibility of a CENELEC member into its own language and notified

to the Central Secretariat has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus,

the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy,

Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia,

Spain, Sweden, Switzerland and the United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Management Centre: Avenue Marnix 17, B - 1000 Brussels

© 2011 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.

Ref. No. EN 62271-206:2011 E
---------------------- Page: 3 ----------------------
SIST EN 62271-206:2011
EN 62271-206:2011 - 2 -
Foreword

The text of document 17C/491/FDIS, future edition 1 of IEC 62271-206, prepared by SC 17C,

High-voltage switchgear and controlgear assemblies, of IEC TC 17, Switchgear and controlgear, was

submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 62271-206 on

2011-03-03.
This European Standard supersedes EN 61958:2001.

The main changes with respect of EN 61958:2001 are an actualization of references and the degree of

protection which has been changed from IPXXB to IP2X.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CEN and CENELEC shall not be held responsible for identifying any or all such patent

rights.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
(dop) 2011-12-03
national standard or by endorsement
– latest date by which the national standards conflicting
(dow) 2014-03-03
with the EN have to be withdrawn
Annex ZA has been added by CENELEC.
__________
Endorsement notice

The text of the International Standard IEC 62271-206:2011 was approved by CENELEC as a European

Standard without any modification.
__________
---------------------- Page: 4 ----------------------
SIST EN 62271-206:2011
- 3 - EN 62271-206:2011
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

The following referenced documents are indispensable for the application 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.

NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD

applies.
Publication Year Title EN/HD Year
IEC 60060-1 - High-voltage test techniques - EN 60060-1 -
Part 1: General definitions and test
requirements
IEC 60068-2-14 - Environmental testing - EN 60068-2-14 -
Part 2-14: Tests - Test N: Change of
temperature
IEC 60068-2-75 - Environmental testing - EN 60068-2-75 -
Part 2-75: Tests - Test Eh: Hammer tests
IEC 60529 - Degrees of protection provided by enclosures - -
(IP Code)
IEC 61243-1 (mod) - Live working - Voltage detectors - EN 61243-1 -
Part 1: Capacitive type to be used for voltages
exceeding 1 kV a.c.
IEC 61243-2 (mod) - Live working - Voltage detectors - EN 61243-2 -
Part 2: Resistive type to be used for voltages
of 1 kV to 36 kV a.c.
IEC 61243-5 (mod) - Live working - Voltage detectors - EN 61243-5 -
Part 5: Voltage detecting systems (VDS)
IEC 62271-1 2007 High-voltage switchgear and controlgear - EN 62271-1 2008
Part 1: Common specifications
IEC 62271-200 - High-voltage switchgear and controlgear - EN 62271-200 -
Part 200: AC metal-enclosed switchgear and
controlgear for rated voltages above 1 kV and
up to and including 52 kV
IEC 62271-201 - High-voltage switchgear and controlgear - EN 62271-201 -
Part 201: AC insulation-enclosed switchgear + corr. November
and controlgear for rated voltages above 1 kV
and up to and including 52 kV
---------------------- Page: 5 ----------------------
SIST EN 62271-206:2011
---------------------- Page: 6 ----------------------
SIST EN 62271-206:2011
IEC 62271-206
Edition 1.0 2011-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
High-voltage switchgear and controlgear –
Part 206: Voltage presence indicating systems for rated voltages above 1 kV
and up to and including 52 kV
Appareillage à haute tension –
Partie 206: Systèmes indicateurs de présence de tension assignées supérieures
à 1 kV et inférieures ou égales à 52 kV
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX T
ICS 29.130.10 ISBN 978-2-88912-314-8
® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 7 ----------------------
SIST EN 62271-206:2011
– 2 – 62271-206  IEC:2011
CONTENTS

FOREWORD ........................................................................................................................... 5

1 General ............................................................................................................................ 7

1.1 Scope ...................................................................................................................... 7

1.2 Normative references .............................................................................................. 7

2 Service conditions............................................................................................................. 7

3 Terms and definitions ....................................................................................................... 8

4 Ratings ............................................................................................................................. 8

4.1 Rated voltage .......................................................................................................... 9

4.2 Rated insulation level ............................................................................................... 9

4.3 Rated frequency ...................................................................................................... 9

5 Design and construction .................................................................................................... 9

5.1 General ................................................................................................................... 9

5.1.1 Parts of VPIS ............................................................................................... 9

5.1.2 Phase comparison ....................................................................................... 9

5.1.3 Degree of protection (IP code) ..................................................................... 9

5.1.4 Impact resistance ........................................................................................ 9

5.1.5 Testing element ........................................................................................... 9

5.2 Threshold values for voltage presence indication ..................................................... 9

5.3 Indication and perceptibility .................................................................................... 10

5.3.1 General ..................................................................................................... 10

5.3.2 Frequency of repetition .............................................................................. 10

5.3.3 Response time ........................................................................................... 10

5.3.4 Indication until power source is exhausted.................................................. 10

5.4 Coupling element and voltage limiting device ......................................................... 10

5.4.1 Insulation of coupling element .................................................................... 10

5.4.2 Voltage limiting device ............................................................................... 10

5.4.3 Threshold voltage of voltage limiting device................................................ 11

5.4.4 Earth fault conditions ................................................................................. 11

5.4.5 Maximum current delivered by the connecting point .................................... 11

5.5 Marking ................................................................................................................. 11

5.6 Phase comparator and connecting point ................................................................. 11

5.6.1 General ..................................................................................................... 11

5.6.2 Clear indication of phase comparators ....................................................... 12

5.6.3 Perceptibility of indication .......................................................................... 12

5.6.4 Indication in case of absence of voltage on one side .................................. 12

5.6.5 Indication in case of absence of voltage on both sides ................................ 12

5.7 Electromagnetic compatibility (EMC) ...................................................................... 12

6 Type tests ....................................................................................................................... 13

6.1 General ................................................................................................................. 13

6.1.1 Sequence of tests ...................................................................................... 13

6.1.2 Test specimens ......................................................................................... 13

6.1.3 Conditioning procedure .............................................................................. 13

6.1.4 Test voltages ............................................................................................. 13

6.1.5 Test conditions .......................................................................................... 13

6.1.6 Values of currents and voltages ................................................................. 14

6.1.7 Tolerances................................................................................................. 14

---------------------- Page: 8 ----------------------
SIST EN 62271-206:2011
62271-206  IEC:2011 – 3 –

6.2 Arrangement, assembly, marking, and instructions for use ..................................... 14

6.3 Clear indication of VPIS ......................................................................................... 14

6.4 Response time of VPIS .......................................................................................... 14

6.5 Dielectric strength of the coupling element of VPIS ................................................ 15

6.6 Maximum current delivered by the connecting point ................................................ 15

6.7 Voltage limiting device ........................................................................................... 15

6.7.1 General ..................................................................................................... 15

6.7.2 Threshold voltage ...................................................................................... 15

6.7.3 Current-carrying capacity ........................................................................... 15

6.8 Clear perceptibility of visual indication .................................................................... 16

6.8.1 Test voltages ............................................................................................. 16

6.8.2 Test set-up ................................................................................................ 16

6.8.3 Test procedure .......................................................................................... 16

6.8.4 Test assessment ....................................................................................... 16

6.8.5 Perceptibility of indication at maximum applied voltage ............................... 16

6.8.6 Perceptibility of indication at low light level ................................................. 17

6.9 Impact resistance .................................................................................................. 17

6.10 Clear indication of phase comparators ................................................................... 17

6.10.1 Test set-up ................................................................................................ 17

6.10.2 Incorrect phase relationship ....................................................................... 17

6.10.3 Correct phase relationship ......................................................................... 17

6.10.4 Absence of voltage on one side .................................................................. 17

6.10.5 Absence of voltage on both sides ............................................................... 18

6.11 Electromagnetic compatibility tests (EMC) .............................................................. 18

6.12 Indication until power source is exhausted ............................................................. 18

6.12.1 Test set-up ................................................................................................ 18

6.12.2 Determination of test voltage ...................................................................... 18

6.12.3 Test procedure .......................................................................................... 18

6.12.4 Repetition of test........................................................................................ 18

6.12.5 Multiple power sources .............................................................................. 18

6.12.6 Test assessment ....................................................................................... 19

7 Routine tests .................................................................................................................. 19

7.1 General ................................................................................................................. 19

7.2 Clear indication ...................................................................................................... 19

8 Guide to the selection of VPIS ........................................................................................ 19

9 Information to be given with enquiries, tenders and orders .............................................. 19

10 Instructions for use ......................................................................................................... 19

10.1 General ................................................................................................................. 19

10.2 Instructions for use of VPIS ................................................................................... 19

10.3 Instructions for use of phase comparators .............................................................. 20

11 Safety ............................................................................................................................. 20

Bibliography .......................................................................................................................... 24

Figure 1 – Voltage presence indicating system ...................................................................... 21

Figure 2 – Examples for measuring the response time ........................................................... 22

Figure 3 – Test set-up for perceptibility of visual indication .................................................... 23

---------------------- Page: 9 ----------------------
SIST EN 62271-206:2011
– 4 – 62271-206  IEC:2011

Table 1 – Indication corresponding to "voltage present" ......................................................... 10

Table 2 – Sequence of type tests for VPIS and phase comparators (PC) ................................ 21

---------------------- Page: 10 ----------------------
SIST EN 62271-206:2011
62271-206  IEC:2011 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR –
Part 206: Voltage presence indicating systems for rated voltages
above 1 kV and up to and including 52 kV
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,

Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC

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

the latter.

5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity

assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any

services carried out by independent certification bodies.

6) All users should ensure that they have the latest edition of this publication.

7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and

members of its technical committees and IEC National Committees for any personal injury, property damage or

other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and

expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC

Publications.

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 IEC Publication may be the subject of

patent rights. IEC shall not be held responsible for identifying any or all such patent rights.

International Standard IEC 62271-206 has been prepared by subcommittee 17C: High-voltage

switchgear and controlgear assemblies, of IEC technical committee 17: Switchgear and

controlgear.

This first edition of IEC 62271-206 cancels and replaces the first edition of IEC 61958. This

edition constitutes a minor revision.

The main changes with respect of the first edition of IEC 61958 are an actualization of

references and the degree of protection which has been changed from IPXXB to IP2X.

---------------------- Page: 11 ----------------------
SIST EN 62271-206:2011
– 6 – 62271-206  IEC:2011
The text of this standard is based on the following documents:
FDIS Report on voting
17C/491/FDIS 17C/500/RVD

Full information on the voting for the approval of this standard can be found in the report on

voting indicated in the above table.

This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

A list of all the parts in the IEC 62271 series under general title High-voltage switchgear and

controlgear can be found on the IEC website.

The committee has decided that the contents of this publication will remain unchanged until the

stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data related to

the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
---------------------- Page: 12 ----------------------
SIST EN 62271-206:2011
62271-206  IEC:2011 – 7 –
HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR –
Part 206: Voltage presence indicating systems for rated voltages
above 1 kV and up to and including 52 kV
1 General
1.1 Scope

This part of IEC 62271 is applicable to voltage presence indicating systems (VPIS) incor-

porated in a.c. switchgear and controlgear covered by IEC 62271-200 or IEC 62271-201.

Voltage presence indicating systems are devices used to provide information to operators

about the voltage condition of the main circuit of the switchgear in which they are installed.

The indication of VPIS alone is not sufficient to prove that the system is dead: if operating

procedures make it mandatory, relevant voltage detectors according to IEC 61243-1,

IEC 61243-2 and IEC 61243-5 should be used.

This standard is also applicable to phase comparators specifically designed for use with VPIS.

1.2 Normative references

The following referenced documents are indispensable for the application 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 60060-1, High-voltage test techniques – Part 1: General definitions and test requirements

IEC 60068-2-14, Environmental testing – Part 2-14: Tests – Test N: Change of temperature

IEC 60068-2-75, Environmental testing – Part 2-75: Tests – Test Eh: Hammer tests
IEC 60529, Degrees of protection provided by enclosures (IP code)

IEC 62271-1:2007, High-voltage switchgear and controlgear – Part 1: Common specifications

IEC 62271-200, High-voltage switchgear and controlgear – Part 200: AC metal-enclosed

switchgear and controlgear for rated voltages above 1 kV and up to and including 52 kV

IEC 62271-201, High-voltage switchgear and controlgear – Part 201: AC insulation-enclosed

switchgear and controlgear for rated voltages above 1 kV and up to and including 52 kV

IEC 61243-1, Live working – Voltage detectors – Part 1: Capacitive type to be used for

voltages exceeding 1 kV a.c.

IEC 61243-2, Live working – Voltage detectors – Part 2: Resistive type to be used for voltages

of 1 kV to 36 kV a.c.

IEC 61243-5, Live working – Voltage detectors – Part 5: Voltage detecting systems (VDS)

2 Service conditions

VPIS are designed to be used under the same service conditions as the switchgear in which

they are installed, as defined in Clause 2 of IEC 62271-1.
---------------------- Page: 13 ----------------------
SIST EN 62271-206:2011
– 8 – 62271-206  IEC:2011
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
voltage presence indicating system (VPIS)
device used to indicate the presence of operating voltage
NOTE 1 VPIS may also be used in conjunction with phase comparators.

NOTE 2 VPIS are not designed to detect reliably the absence of voltage: for this purpose, only voltage detectors

or voltage detecting systems (VDS according to IEC 61243-5) should be used.
3.2
coupling element

part of the VPIS connected to the main circuit which transmits to the indicating element a

signal related to the voltage condition of this circuit. Different physical principles can be used

for the coupling element, for example, capacitive, resistive, optical, etc.
3.3
indicating element

part of the VPIS which gives a visual indication depending on the input signal received from the

coupling element
3.4
connecting point

point of the indicating element where a suitable phase comparator may be connected

3.5
phase comparator

apparatus which indicates the phase relationship between the connecting points of two VPIS

3.6
nominal voltage (U
suitable approximate value of voltage used to identify a system or device
[IEC 60050-601:1985, 601-01-21, modified]

NOTE 1 The nominal voltage of the VPIS is the parameter associated with its clear indication. VPIS may have one

nominal voltage U , or a nominal voltage range. Limit values of the nominal voltage range are named U and

n nmin
U .
nmax

NOTE 2 In this standard, the nominal voltage of a three-phase system is the normal phase-to-phase voltage. The

nominal voltage of a single-phase system is the normal voltage between lines.
3.7
voltage limiting device

protective device that limits the voltage at the output terminal of the coupling element in the

case of insulation failure
4 Ratings

The following ratings of the switchgear shall also be applicable to the VPIS incorporated in it:

– rated voltage;
– rated insulation level;
– rated frequency(ies).

In addition, the nominal voltage, or nominal voltage range, of the systems on which the VPIS

can be used, shall be defined.
---------------------- Page: 14 ----------------------
SIST EN 62271-206:2011
62271-206  IEC:2011 – 9 –
4.1 Rated voltage
Refer to 4.1 of IEC 62271-1.
4.2 Rated insulation level
Refer to 4.2 of IEC 62271-1.
4.3 Rated frequency
Refer to 4.3 of IEC 62271-1.
5 Design and construction
5.1 General
5.1.1 Parts of VPIS
A VPIS includes
– a coupling element;
– an indicating element;
– a connecting point (optional).

Both the coupling and indicating elements are fixed and incorporated in switchgear (see

Figure 1).
5.1.2 Phase comparison

VPIS should allow checking of phase relationship by means of a suitable phase comparator.

The characteristics of the phase comparator shall be defined by the manufacturer of the VPIS.

5.1.3 Degree of protection (IP code)

Parts of the VPIS which contribute to the switchgear enclosure shall meet the degree of

protection defined for the switchgear.

If the VPIS includes hazardous parts when in service, it shall provide at least an IP2X degree of

protection according to IEC 60529, even when replaceable parts are removed.
5.1.4 Impact resistance
Accessible parts of VPIS shall be resistant to mechanical impact.
5.1.5 Testing element

VPIS with a built-in power source shall be equipped with a testing element to check the

condition of the battery.
5.2 Thresh
...

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