IEC 61394:2011

Overhead lines - Requirements for greases for aluminium, aluminium alloy and steel bare conductors

IEC 61394:2011 specifies the requirements and tests of greases designed for corrosion protection of bare overhead conductors.

General Information

• Status: Published
• Publication Date: 11-Oct-2011
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 29.060.20 - Cables
• ICS: 29.240.20 - Power transmission and distribution lines
• Technical Committee: TC 7 - Overhead electrical conductors
• Drafting Committee: MT 1 - TC 7/MT 1
• Current Stage: PPUB - Publication issued
• Start Date: 31-Oct-2011
• Completion Date: 12-Oct-2011

Relations

• Replaces: IEC TS 61394:1997 - Overhead lines - Characteristics of greases for aluminium, aluminium alloy and steel bare conductors
• Effective Date: 05-Sep-2023
• Corrected By: IEC 61394:2011/COR1:2012 - Corrigendum 1 - Overhead lines - Requirements for greases for aluminium, aluminium alloy and steel bare conductors
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 61394 ®
Edition 1.0 2011-10
INTERNATIONAL
STANDARD
colour
inside
Overhead lines – Requirements for greases for aluminium, aluminium alloy and
steel bare conductors
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IEC 61394 ®
Edition 1.0 2011-10
INTERNATIONAL
STANDARD
colour
inside
Overhead lines – Requirements for greases for aluminium, aluminium alloy and
steel bare conductors
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
R
ICS 29.060.20; 29.240.20 ISBN 978-2-88912-706-1

– 2 – 61394 © IEC:2011(E)
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Designation system . 5
4 Requirements for grease . 6
5 Tests . 6
5.1 Classification of tests . 6
5.1.1 Type tests . 6
5.1.2 Sample tests . 6
5.2 Preconditioning of samples . 6
5.2.1 Type A products . 6
5.2.2 Type B products . 6
5.2.3 Products taken from a conductor . 6
5.3 Drop point . 7
5.4 High temperature stability (Type A products only) . 7
5.5 Penetrability test . 7
5.6 Low-temperature adherence . 7
5.7 Acidity/alkalinity (type B grease only) . 7
5.8 Ageing . 8
5.8.1 Preconditioning. 8
5.9 Corrosion tests . 8
5.10 Stability of grease on conductor at high temperature . 8
5.11 Stability of grease on conductor under short-circuit . 9
Annex A (normative) Acidity or alkalinity test method for type B grease . 11
Annex B (normative) Sample preparation and test procedure for ageing test. 13
Annex C (normative) Stability of grease on conductor at high temperature . 16
Annex D (normative) Stability of grease complete conductor under short-circuit . 17
Bibliography . 18

Figure 1 – Corrosion coupons . 10
Figure B.1 – Coupon for type A grease . 13
Figure B.2 – Coupon for type B grease . 14

Table 1 – Classification of tests . 6
Table A.1 – Acidity or alkalinity index formula . 12

61394 © IEC:2011(E) – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
OVERHEAD LINES –
REQUIREMENTS FOR GREASES FOR ALUMINIUM,
ALUMINIUM ALLOY AND STEEL BARE CONDUCTORS

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
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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 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 61394 has been prepared by IEC technical committee 7: Overhead
electrical conductors.
This first edition of IEC 61394 cancels and replaces the first edition of technical specification
IEC/TS 61394 published in 1997. It constitutes a technical revision and now has the status of
an International Standard.
The text of this standard is based on the following documents:
FDIS Report on voting
7/609/FDIS 7/613/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.

– 4 – 61394 © IEC:2011(E)
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.
IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct
understanding of its contents. Users should therefore print this document using a
colour printer.
A bilingual version of this publication may be issued at a later date.
The contents of the corrigendum of August 2012 have been included in this copy.

61394 © IEC:2011(E) – 5 –
OVERHEAD LINES –
REQUIREMENTS FOR GREASES FOR ALUMINIUM,
ALUMINIUM ALLOY AND STEEL BARE CONDUCTORS

1 Scope
This International Standard specifies the requirements and tests of greases designed for
corrosion protection of bare overhead conductors.
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 60068-2-11:1981, Basic environmental testing procedures – Part 2-11: Tests – Test Ka:
Salt mist
lSO 2137:2007, Petroleum products and lubricants – Determination of cone penetration of
lubricating greases and petrolatum
ISO 2176:1995, Petroleum products – Lubricating grease – Determination of dropping point
3 Designation system
Greases shall be designated θ Aθ or θ Bθ where A and B define the type of grease as
1 2 1 2
follows:
– type A: products generally applied in the cold state, for example greases: semi-solid or
solid products consisting essentially of a stabilized mixture of mineral or synthetic oil and
thickeners such as metal soaps or inorganic compounds;
– type B: products generally applied in the hot state, for example petrolatum: semi-solid, or
solid products made up essentially of microcrystalline waxes associated with small
quantities of mineral oil and organic additives;
– θ is the lowest temperature in °C below 0 °C at which the grease will perform the
requirement of protection of the conductor from atmospheric corrosion;
– θ is the highest temperature, in °C, at which the grease will perform to this requirement
(achieve specified drop point or high temperature stability).
Examples:
− 20A150 type A grease with a temperature θ of -20 °C and θ of 150 °C.
1 2
− 20B110 type B grease with a temperature θ of -20 °C and θ of 110 °C.
1 2
The grease supplier shall provide a unique identifier for its grease, and shall retain details of
its composition for future reference. The composition shall include manufacturing tolerance
and shall remain unchanged while the grease is marketed under this specific identifier.

– 6 – 61394 © IEC:2011(E)
4 Requirements for grease
The grease shall protect overhead bare conductors from atmospheric corrosion in service and
in storage. The grease shall remain in the conductor for the specified conditions of operation.
The grease shall meet the requirements as described in this standard.
5 Tests
5.1 Classification of tests
5.1.1 Type tests
Type tests are intended to verify the main characteristics of a grease which depend mainly on
its composition. They are carried out once for a supplier's specific product and then
subsequently repeated when the composition of the grease has changed.
5.1.2 Sample tes
...