IEC 62772:2016

IEC 62772 ®
Edition 1.0 2016-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Composite hollow core station post insulators for substations with a.c. voltage
greater than 1 000 V and d.c. voltage greater than 1 500 V – Definitions, test
methods and acceptance criteria

Isolateurs supports composites creux pour postes présentant une tension
alternative supérieure à 1 000 V et une tension continue supérieure à 1 500 V –
Définitions, méthodes d'essai et critères d'acceptation

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IEC 62772 ®
Edition 1.0 2016-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Composite hollow core station post insulators for substations with a.c. voltage

greater than 1 000 V and d.c. voltage greater than 1 500 V – Definitions, test

methods and acceptance criteria

Isolateurs supports composites creux pour postes présentant une tension

alternative supérieure à 1 000 V et une tension continue supérieure à 1 500 V –

Définitions, méthodes d'essai et critères d'acceptation

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.080.10 ISBN 978-2-8322-3601-7

– 2 – IEC 62772:2016 © IEC 2016

CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references. 7
3 Terms and definitions . 8
4 Identification and marking . 12
5 Environmental conditions . 12
6 Information on transport, storage and installation . 12
7 Classification of tests . 12
7.1 General . 12
7.2 Design tests . 13
7.3 Type tests . 13
7.4 Sample tests . 13
7.5 Routine tests . 13
8 Design tests . 14
8.1 General . 14
8.2 Tests on interfaces and connections of end fittings . 15
8.2.1 General . 15
8.2.2 Test specimens . 15
8.2.3 Reference dry power frequency test . 15
8.2.4 Thermal mechanical pre-stressing test . 15
8.2.5 Water immersion pre-stressing test . 15
8.2.6 Verification tests . 15
8.3 Assembled core load tests . 16
8.3.1 Test for the verification of the maximum design cantilever load (MDCL) . 16
8.3.2 Test for the verification of the maximum design torsion load (MDToL) . 16
8.3.3 Verification of the specified tension load (STL) . 17
8.4 Tests on shed and housing material . 18
8.4.1 General . 18
8.4.2 Tracking and erosion test . 18
8.4.3 Flammability test . 18
8.5 Tests on the tube material . 18
8.5.1 General . 18
8.5.2 Dye penetration test . 18
8.5.3 Water diffusion test . 18
9 Type tests . 18
9.1 Internal pressure test . 18
9.2 Bending test . 18
9.3 Specified tension load test, compression and buckling withstand load test . 19
9.4 Electrical tests . 19
9.5 Wet switching impulse withstand voltage . 19
10 Sample tests . 19
11 Routine tests . 19
11.1 General . 19
11.2 Routine seal leak rate test . 19

11.3 Test procedure . 19
11.4 Acceptance criteria . 19
12 Documentation . 20
Annex A (informative) Water diffusion test . 21
Bibliography . 22

Figure A.1 – Example of sample preparation for water diffusion test . 21

Table 1 – Required design and type tests . 14

– 4 – IEC 62772:2016 © IEC 2016
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
COMPOSITE HOLLOW CORE STATION POST INSULATORS
FOR SUBSTATIONS WITH A.C. VOLTAGE GREATER THAN
1 000 V AND D.C. VOLTAGE GREATER THAN 1 500 V –
DEFINITIONS, TEST METHODS AND ACCEPTANCE CRITERIA

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
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with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements
...