EN 61897:1998

Overhead lines - Requirements and tests for Stockbridge type aeolian vibration dampers

Applies to Stockbridge type aeolian vibration dampers intended for single conductors or earth wires or conductor bundles where dampers are direclty attached to each subconductor.

Freileitungen - Anforderungen und Prüfungen für Schwingungsdämpfer Typ Stockbridge

Lignes aériennes - Exigences et essais applicables aux amortisseurs de vibrations éoliennes Stockbridge

S'applique aux amortisseurs de vibrations éoliennes de type Stockbridge destinés aux conducteurs ou câbles de garde uniques ou aux faisceaux de conducteurs où les amortisseurs sont fixés directement à chacun des sous-conducteurs.

Nadzemni vodi - Zahteve in preskusi za dušilnike vetrnih vibracij Stockbridge (IEC 61897:1998)

General Information

• Status: Withdrawn
• Publication Date: 11-Oct-1998
• Withdrawal Date: 30-Jun-2001
• ICS: 29.240.20 - Power transmission and distribution lines
• Technical Committee: CLC/TC 11 - Overhead electrical lines exceeding 1 kV a.c. (1,5 kV d.c.)
• Drafting Committee: IEC/TC 11 - IEC_TC_11
• Parallel Committee: IEC/TC 11 - IEC_TC_11
• Current Stage: 9960 - Withdrawal effective - Withdrawal
• Start Date: 07-Apr-2023
• Completion Date: 07-Apr-2023
• Ref Project: SIST EN 61897:1999 - Overhead lines - Requirements and tests for Stockbridge type aeolian vibration dampers

Relations

• Replaced By: EN IEC 61897:2020 - Overhead lines - Requirements and tests for Aeolian vibration dampers
• Effective Date: 07-Jun-2022

Standards Content (Sample)

SLOVENSKI STANDARD
01-november-1999
Nadzemni vodi - Zahteve in preskusi za dušilnike vetrnih vibracij Stockbridge (IEC
61897:1998)
Overhead lines - Requirements and tests for Stockbridge type aeolian vibration dampers
Freileitungen - Anforderungen und Prüfungen für Schwingungsdämpfer Typ Stockbridge
Lignes aériennes - Exigences et essais applicables aux amortisseurs de vibrations
éoliennes Stockbridge
Ta slovenski standard je istoveten z: EN 61897:1998
ICS:
29.240.20 Daljnovodi Power transmission and
distribution lines
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

NORME
CEI
INTERNATIONALE
IEC
INTERNATIONAL
Première édition
STANDARD
First edition
1998-09
Lignes aériennes –
Exigences et essais applicables aux amortisseurs
de vibrations éoliennes Stockbridge
Overhead lines –
Requirements and tests for Stockbridge type
aeolian vibration dampers
 IEC 1998 Droits de reproduction réservés  Copyright - all rights reserved
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For price, see current catalogue

61897 © IEC:1998 – 3 –
CONTENTS
Page
FOREWORD . 7
Clause
1 Scope . 9
2 Normative references . 9
3 Definitions. 11
4 General requirements. 11
4.1 Design . 11
4.2 Materials. 11
4.3 Mass, dimensions and tolerances. 11
4.4 Protection against corrosion . 13
4.5 Manufacturing appearance and finish . 13
4.6 Marking. 13
4.7 Installation instructions. 13
5 Quality assurance . 13
6 Classification of tests . 13
6.1 Type tests . 13
6.1.1 General. 13
6.1.2 Application . 13
6.2 Sample tests . 15
6.2.1 General. 15
6.2.2 Application . 15
6.2.3 Sampling, acceptance criteria. 15
6.3 Routine tests. 15
6.3.1 General. 15
6.3.2 Application and acceptance criteria. 15
6.4 Table of tests to be applied . 17
7 Test methods . 17
7.1 Visual examination . 17
7.2 Verification of dimensions, materials and mass . 19
7.3 Corrosion protection tests . 19
7.3.1 Hot dip galvanized components (other than messenger cable wires) . 19
7.3.2 Ferrous components protected from corrosion by methods other
than hot dip galvanizing. 19
7.3.3 Hot dip galvanized messenger cable wires. 19
7.4 Non-destructive tests . 21
7.5 Clamp slip test . 21
7.6 Breakaway bolt test. 21
7.7 Clamp bolt tightening test. 23
7.8 Attachment of weights to messenger cable . 23
7.9 Attachment of clamp to messenger cable test. 23
7.10 Corona and radio interference voltage (RIV) tests. 25

61897 © IEC:1998 – 5 –
Clause Page
7.11 Damper performance tests . 25
7.11.1 Performance test variants. 25
7.11.2 Damper characteristic test. 25
7.11.3 Damper effectiveness evaluation . 27
7.11.3.1 Methods of evaluation. 27
7.11.3.2 Laboratory test. 29
7.11.3.3 Field test . 31
7.11.3.4 Analytical method . 33
7.12 Damper fatigue test. 33
7.12.1 Test methods . 33
7.12.2 Swept frequency method . 33
7.12.3 Resonant frequency method . 35
7.12.4 Acceptance criteria. 35
Annex A (normative)   Minimum technical details to be agreed between purchaser
and supplier . 37
Annex B (informative)  Examples of graphs relevant to damper characteristic test . 39
Annex C (normative)   Wind power input curve. 41
Bibliography . 45

61897 © IEC:1998 – 7 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
–––––––––––
OVERHEAD LINES –
REQUIREMENTS AND TESTS FOR
STOCKBRIDGE TYPE AEOLIAN VIBRATION DAMPERS
FOREWORD
1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of the 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, the IEC publishes International Standards. 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. The 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 the 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 National Committees.
3) The documents produced have the form of recommendations for international use and are published in the form
of standards, technical reports or guides and they are accepted by the National Committees in that sense.
4) In order to promote international unification, IEC National Committees undertake to apply IEC International
Standards transparently to the maximum extent possible in their national and regional standards. Any
divergence between the IEC Standard and the corresponding national or regional standard shall be clearly
indicated in the latter.
5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with one of its standards.
6) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject
of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 61897 has been prepared by IEC technical committee 11: Overhead
lines.
The text of this standard is based on the following documents:
FDIS Report on voting
11/140/FDIS 11/142/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.
Annexes A and C form an integral part of this standard.
Annex B is for information only.

61897 © IEC:1998 – 9 –
OVERHEAD LINES –
REQUIREMENTS AND TESTS FOR
STOCKBRIDGE TYPE AEOLIAN VIBRATION DAMPERS
1 Scope
This International Standard applies to Stockbridge type aeolian vibration dampers intended for
single conductors or earth wires or conductor bundles where dampers are directly attached to
each subconductor.
The purchaser may adopt part(s) of this standard when specifying requirements for other types
of aeolian vibration dampers or for Stockbridge dampers used on conductors or cables
different from those mentioned above (e.g. optical ground wires, all dielectric self-supporting
optical cables).
In many cases, test procedures and test values are left to agreement between the purchaser
and the supplier and are stated in the procurement contract.
Annex A lists the minimum technical details to be agreed between purchaser and supplier.
Throughout this standard, the word “conductor” is used when the test applies to Stockbridge
dampers for conductors or earth wires.
2 Normative references
The following normative documents contain provisions which, through reference in this text,
constitute provisions of this International Standard. At the time of publication, the editions
indicated were valid. All normative documents are subject to revision, and parties to
agreements based on this International Standard are encouraged to investigate the possibility
of applying the most recent editions of the normative documents indicated below. Members of
IEC and ISO maintain registers of currently valid International Standards.
IEC 60050(466):1990, International Electrotechnical Vocabulary (IEV) – Chapter 466:
Overhead lines
IEC 61284:1997, Overhead lines – Requirements and tests for fittings
IEC 60888:1987, Zinc-coated steel wires for stranded conductors
1)
ISO 1461, — Hot dip galvanized coatings on fabricated ferrous products – Specifications
ISO 2859-1:1989, Sampling procedures for inspection by attributes – Part 1: Sampling plans
indexed by acceptable quality level (AQL) for lot-by-lot inspection
––––––––––
1)
To be published.
61897 © IEC:1998 – 11 –
ISO 2859-2:1985, Sampling procedures for inspection by attributes – Part 2: Sampling plans
indexed by limiting quality level (LQ) for isolated lot inspection
ISO 3951:1989, Sampling procedures and charts for inspection by variables for percent
nonconforming
3 Definitions
For the purpose of this International Standard, the definitions of the International
Electrotechnical Vocabulary (IEV) apply, in particular IEC 60050(466). Those which differ or do
not appear in the IEV are given below.
Stockbridge-type aeolian vibration damper
device comprising a messenger cable with a weight at each end and one bolted clamp,
attachable to a conductor for the purpose of damping aeolian vibration
4 General requirements
4.1 Design
The damper shall be designed so as to
– damp aeolian vibration;
– withstand mechanical loads imposed during installation, maintenance and specified service
conditions;
– avoid damage to the conductor under specified service conditions;
– be capable of being removed and re-installed without damage to the conductor;
– be free from unacceptable levels of corona and radio interference under all service
conditions;
– be suitable for safe and easy installation. The clamp design shall retain all parts when
opened for attachment to conductor. Furthermore, the clamp design shall be such that the
damper, during installation, can be suspended on the conductor before tightening the
clamp;
– ensure that individual com
...