Live working - Phase comparators - Part 1: Capacitive type to be used for voltages exceeding 1 kV a.c.

IEC 61481-1:2014 is applicable to portable phase comparators of capacitive type to be used on electrical systems for voltages exceeding 1 kV a.c. and frequencies of 50 Hz and/or 60 Hz. This standard is applicable to single-pole phase comparators of capacitive type operating with a memory system up to 36 kV a.c., and two-pole phase comparators of capacitive type operating with a wireless connection up to 245 kV a.c. This standard is applicable to phase comparators of capacitive type used in contact with the bare conductive parts to be compared as a complete device including its insulating element or as a separate device, adaptable to an insulating stick which, as a separate tool, is not covered by this standard. A device that is designed to provide other functions than phase comparison is a different device and is not covered by this standard. For example a device designed to be also used as a voltage detector is not covered by this standard. This first edition, together with the first edition of IEC 61481-2, cancels and replaces the first edition of IEC 61481 published in 2001, Amendment 1:2002 and Amendment 2:2004. This edition constitutes a technical revision including the following major changes:
- split of the standard in two parts;
- extension of the scope to include two-pole phase comparators operating with a wireless connection up to 245 kV a.c.;
- review of the requirements for indication;
- introduction of a requirement for a new marking "LU" for limited use;
- and revision of existing annexes. The contents of the corrigendum of July 2015 have been included in this copy.

Travaux sous tension - Comparateurs de phase - Partie 1: Type capacitifs pour usage sur des tensions alternatives de plus de 1 kV

L'IEC 61481-1:2014 est applicable aux comparateurs de phase portatifs de type capacitif pour une utilisation sur des installations électriques à des tensions alternatives supérieures à 1 kV et à des fréquences de 50 Hz et/ou 60 Hz. La présente norme est applicable aux comparateurs de phase unipolaires de type capacitif fonctionnant avec un système de mémoire, jusqu'à une tension alternative de 36 kV, et aux comparateurs de phase bipolaires de type capacitif fonctionnant avec une liaison sans fil, jusqu'à une tension alternative de 245 kV. La présente norme est applicable aux comparateurs de phase de type capacitif utilisés au contact avec les parties nues conductrices à comparer au dispositif complet incluant son élément isolant ou au dispositif séparé adaptable sur une perche isolante qui, en tant qu'outil séparé, n'est pas couverte par la présente norme. Un dispositif conçu pour réaliser d'autres fonctions que la comparaison de phase est un dispositif différent et n'est pas couvert par la présente norme. Par exemple, un dispositif conçu pour être aussi utilisé comme détecteur de tension n'est pas couvert par la présente norme. Cette première édition, avec la première édition de l'IEC 61481-2, annule et remplace la première édition de l'IEC 61481 parue en 2001, l'Amendement 1:2002 et l'Amendement 2:2004. Cette édition constitue une révision technique qui inclut les modifications majeures suivantes:
- division de la norme en deux parties;
- extension du domaine d'application permettant de couvrir les comparateurs de phase bipolaires fonctionnant avec une liaison sans fil jusqu'à des tensions alternatives de 245 kV;
- la révision des exigences relatives à l'indication;
- l'introduction d'une exigence relative à un nouveau marquage "LU" pour une utilisation limitée;
- et la révision des annexes existantes. Le contenu du corrigendum de juillet 2015 a été pris en considération dans cet exemplaire.

General Information

Status
Published
Publication Date
23-Oct-2014
Technical Committee
Current Stage
PPUB - Publication issued
Start Date
24-Oct-2014
Completion Date
24-Oct-2014
Ref Project

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IEC 61481-1
Edition 1.0 2014-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Live working – Phase comparators –
Part 1: Capacitive type to be used for voltages exceeding 1 kV a.c.
Travaux sous tension – Comparateurs de phase –

Partie 1: Type capacitif pour usage sur des tensions alternatives de plus de 1 kV

IEC 61481-1:2014-10(en-fr)
---------------------- Page: 1 ----------------------
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---------------------- Page: 2 ----------------------
IEC 61481-1
Edition 1.0 2014-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Live working – Phase comparators –
Part 1: Capacitive type to be used for voltages exceeding 1 kV a.c.
Travaux sous tension – Comparateurs de phase –

Partie 1: Type capacitif pour usage sur des tensions alternatives de plus de 1 kV

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX XC
ICS 13.260; 29.240.20; 29.260.99 ISBN 978-2-8322-1879-2

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

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 3 ----------------------
– 2 – IEC 61481-1:2014 © IEC 2014
CONTENTS

FOREWORD ........................................................................................................................... 6

INTRODUCTION ..................................................................................................................... 9

1 Scope ............................................................................................................................ 10

2 Normative references .................................................................................................... 10

3 Terms and definitions .................................................................................................... 11

4 Requirements ................................................................................................................ 15

4.1 Indication .............................................................................................................. 15

4.2 Functional requirements........................................................................................ 16

4.2.1 Clear indication ............................................................................................. 16

4.2.2 Distance range .............................................................................................. 17

4.2.3 Clear perceptibility ......................................................................................... 17

4.2.4 Temperature and humidity dependence of the indication................................ 17

4.2.5 Frequency dependence ................................................................................. 18

4.2.6 Response time ............................................................................................... 18

4.2.7 Power source dependability ........................................................................... 18

4.2.8 Testing element ............................................................................................. 18

4.2.9 Time rating .................................................................................................... 19

4.3 Electrical requirements ......................................................................................... 19

4.3.1 Insulating material ......................................................................................... 19

4.3.2 Protection against bridging ............................................................................ 19

4.3.3 Resistance against sparking .......................................................................... 19

4.3.4 Insulating element of phase comparator as a complete device ....................... 19

4.3.5 Indicator casing ............................................................................................. 19

4.4 Mechanical requirements ...................................................................................... 20

4.4.1 General ......................................................................................................... 20

4.4.2 Design ........................................................................................................... 20

4.4.3 Dimensions, construction ............................................................................... 22

4.4.4 Grip force and deflection ............................................................................... 23

4.4.5 Vibration resistance ....................................................................................... 23

4.4.6 Drop resistance ............................................................................................. 23

4.4.7 Shock resistance ........................................................................................... 23

4.5 Marking ................................................................................................................. 23

4.6 Instructions for use ............................................................................................... 24

4.7 Requirements in the case of reasonably foreseeable misuse during live

working ................................................................................................................. 24

4.7.1 Voltage selection ........................................................................................... 24

4.7.2 Frequency selection ...................................................................................... 24

4.7.3 Channel selection for wireless connection ..................................................... 24

5 Tests ............................................................................................................................. 24

5.1 General ................................................................................................................. 24

5.1.1 Testing provisions ......................................................................................... 24

5.1.2 Atmospheric conditions .................................................................................. 25

5.1.3 Tests under wet conditions ............................................................................ 25

5.1.4 Type test ....................................................................................................... 25

5.1.5 Test methods ................................................................................................. 26

5.2 Function tests ....................................................................................................... 26

---------------------- Page: 4 ----------------------
IEC 61481-1:2014 © IEC 2014 – 3 –

5.2.1 Description of the test set-up and general pass criteria .................................. 26

5.2.2 Clear indication ............................................................................................. 32

5.2.3 Distance range for two-pole phase comparators with wireless

connection ..................................................................................................... 34

5.2.4 Electromagnetic compatibility (EMC) ............................................................. 34

5.2.5 Influence of electric interference fields........................................................... 35

5.2.6 Clear perceptibility ......................................................................................... 37

5.2.7 Frequency dependence ................................................................................. 45

5.2.8 Response time ............................................................................................... 46

5.2.9 Power source dependability ........................................................................... 47

5.2.10 Check of testing element ............................................................................... 47

5.2.11 Time rating of single-pole phase comparator ................................................. 47

5.2.12 Time rating of two-pole wireless phase comparators ...................................... 48

5.3 Dielectric tests ...................................................................................................... 48

5.3.1 Insulating material for tubes and rods ............................................................ 48

5.3.2 Protection against bridging for indoor/outdoor type phase comparators ......... 49

5.3.3 Protection against bridging for outdoor type phase comparator ...................... 52

5.3.4 Spark resistance ............................................................................................ 54

5.3.5 Leakage current for phase comparator as a complete device ......................... 56

5.4 Mechanical tests ................................................................................................... 58

5.4.1 Visual and dimensional inspection ................................................................. 58

5.4.2 Grip force and deflection for phase comparator as a complete device ............ 59

5.4.3 Vibration resistance ....................................................................................... 59

5.4.4 Drop resistance ............................................................................................. 60

5.4.5 Shock resistance ........................................................................................... 61

5.4.6 Climatic resistance ........................................................................................ 61

5.4.7 Durability of markings .................................................................................... 63

5.5 Test for reasonably foreseeable misuse during live working .................................. 63

5.5.1 Voltage selection (where relevant) ................................................................. 63

5.5.2 Frequency selection (where relevant) ............................................................ 63

5.5.3 Channel selection for wireless connection (where relevant) ........................... 63

6 Conformity assessment of phase comparators having completed the production

phase ............................................................................................................................ 64

7 Modifications ................................................................................................................. 64

Annex A (normative) Instructions for use ............................................................................. 65

Annex B (normative) Suitable for live working; double triangle (IEC 60417-5216 (2002-

10)) ....................................................................................................................................... 67

Annex C (normative) Chronology of type tests ..................................................................... 68

Annex D (normative) Classification of defects and tests to be allocated ............................... 70

Annex E (informative) Information and guidelines on the use of the limit mark and of a

contact electrode extension .................................................................................................. 72

E.1 General ................................................................................................................. 72

E.2 Situation when using a phase comparator as a complete device ........................... 72

E.3 Situation when using a phase comparator as a separate device ............................ 76

Annex F (informative) Rationale for the classification of defects........................................... 78

Annex G (informative) In-service care .................................................................................. 80

Bibliography .......................................................................................................................... 81

---------------------- Page: 5 ----------------------
– 4 – IEC 61481-1:2014 © IEC 2014

Figure 1 – Illustration of different elements and different principles of functioning of

phase comparators ............................................................................................................... 21

Figure 2 – Location of allowed conductive parts within the minimum length of the

insulating element of a pole of a phase comparator as a complete device ............................. 22

Figure 3 – Test set-up for clear indication with the ball electrode in front of its ring

electrode .............................................................................................................................. 28

Figure 4 – Test set-up for clear indication with the ball electrode behind its ring

electrode .............................................................................................................................. 29

Figure 5 – Positioning of a pole of the phase comparator in relation to a ball and ring

test arrangement................................................................................................................... 31

Figure 6 – Examples of suitable means for ensuring appropriate contact between a

contact electrode and the ball electrode ................................................................................ 31

Figure 7 – Test set-up for clear perceptibility of visual indication .......................................... 38

Figure 8 – Test set-up for measurement of clear perceptibility of visual indication in

the case of an indicator unit .................................................................................................. 40

Figure 9 – Test set-up for clear perceptibility of audible indication ........................................ 42

Figure 10 –Test set-up for measurement of clear perceptibility of audible indication in

the case of indicator units ..................................................................................................... 44

Figure 11 – Test arrangements and dimensions of the bars for protection against

bridging ................................................................................................................................ 49

Figure 12 – Electrical connection of the bars ........................................................................ 51

Figure 13 – Surface stress test ............................................................................................. 51

Figure 14 – Radial and surface stress test ............................................................................ 52

Figure 15 – Test arrangement for testing bridging protection of outdoor type phase

comparator ........................................................................................................................... 54

Figure 16 – Arrangement for leakage current test under dry conditions for phase

comparator as a complete device .......................................................................................... 57

Figure 17 – Arrangement for leakage current tests under wet conditions for phase

comparator as a complete device .......................................................................................... 58

Figure 18 – Test for grip force ............................................................................................... 59

Figure 19 – Drop resistance test – Diagonal position ............................................................ 61

Figure 20 – Curve of test cycle for climatic resistance ........................................................... 62

Figure E.1 – Insulating element of a pole of a phase comparator as a complete device ....... 72

Figure E.2 – Example of positioning of a pole of a phase comparator in contact with a

live part without obstacles from other live parts ..................................................................... 73

Figure E.3 – Example of incorrect positioning of a pole of a phase comparator with the

limit mark between two live parts .......................................................................................... 74

Figure E.4 – Usual ways of managing the design or the use of the phase comparator

for maintaining the insulation distance between the limit mark and the hand guard ............... 75

Figure E.5 – Usual ways of managing the use of the phase comparator as a separate

device for assuring the appropriate insulation for the worker ................................................. 77

Table 1 – Climatic condition ranges ...................................................................................... 18

Table 2 – Minimum length of the insulating element (L ) of a phase comparator as a

complete device .................................................................................................................... 22

Table 3 – Dimensioning of the ball and ring test set-up ......................................................... 30

Table 4 – Test series and conditions for clear indication ....................................................... 33

Table 5 – Test series and conditions for influence of electric interference fields .................... 36

---------------------- Page: 6 ----------------------
IEC 61481-1:2014 © IEC 2014 – 5 –

Table 6 – Type of test ........................................................................................................... 49

Table 7 – Distance d for the bridging test set-up ................................................................. 50

Table 8 – Dimensions for the concentric rings and band electrodes ...................................... 52

Table C.1 – Sequential order for performing type tests ........................................................ 68

Table C.2 – Type tests out of sequence ................................................................................ 69

Table D.1 – Classification of defects and associated requirements and tests ........................ 70

Table E.1 – Recommended minimum lengths from the limit mark to the contact

electrode (A ) ........................................................................................................................ 75

Table F.1 – Rationale for the classification of defects ........................................................... 78

Table G.1 – In-service testing ............................................................................................... 80

---------------------- Page: 7 ----------------------
– 6 – IEC 61481-1:2014 © IEC 2014
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
LIVE WORKING –
PHASE COMPARATORS –
Part 1: Capacitive type to be used for voltages exceeding 1 kV a.c.
FOREWORD

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International Standard IEC 61481-1 has been prepared by IEC technical committee 78: Live

working.

This first edition, together with the first edition of IEC 61481-2, cancels and replaces the first

edition of IEC 61481 published in 2001, Amendment 1:2002 and Amendment 2:2004. This

edition constitutes a technical revision.
---------------------- Page: 8 ----------------------
IEC 61481-1:2014 © IEC 2014 – 7 –
The major changes are:
• split of the standard in two parts;

• extension of the scope to include two-pole phase comparators operating with a wireless

connection up to 245 kV a.c.;
• review of the requirements for indication;
• introduction of a requirement for a new marking “LU” for limited use;

• addition of requirements and tests for two-pole phase comparators operating with a

wireless connection;

• clarification of the test procedures in case of additional contact electrodes, accessories

and combination of accessories, as well as in case of family of phase comparators;

• addition of requirements and tests for electromagnetic compatibility (EMC);
• clarification of the test provisions for the function tests;

• clarification of the test procedure for clear perceptibility of audible indication;

• preparation of the elements of evaluation of defects, and general application of

IEC 61318:2007;
• revision of existing annexes;
• change of existing normative Annex C in two new Annexes D and F giving the

classification of defects (normative) and the rationale for the classification of defects

(informative);

• deletion of existing Annex D, no longer needed following the specification of IEC 60068-2-

75;
• deletion of existing Annex F, not applicable according to IEC 61318:2007;

• addition of a new informative Annex E giving additional information on the use of the limit

mark and of a contact electrode extension.
The text of this standard is based on the following documents:
FDIS Report on voting
78/1051/FDIS 78/1087/RVD

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

voting indicated in the above tab
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