SIST EN 61236:1999
(Main)Saddles, pole clamps (stick clamps) and accessories for live working
Saddles, pole clamps (stick clamps) and accessories for live working
Applies to saddles and pole clamps (stick clamps) used for live working, and to their accessories.
Mastsättel, Stangenschellen und Zubehör zum Arbeiten unter Spannung
Selles, manchons et accessoires pour travaux sous tension
S'applique aux selles et manchons utilisés pour les travaux sous tension, ainsi qu'à leurs accessoires.
Sedeži, palične skobe (objemke) in pribor za delo pod napetostjo (IEC 61236:1993, spremenjen)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 61236:1999
01-julij-1999
6HGHåLSDOLþQHVNREH REMHPNH LQSULERU]DGHORSRGQDSHWRVWMR ,(&
VSUHPHQMHQ
Saddles, pole clamps (stick clamps) and accessories for live working
Mastsättel, Stangenschellen und Zubehör zum Arbeiten unter Spannung
Selles, manchons et accessoires pour travaux sous tension
Ta slovenski standard je istoveten z: EN 61236:1995
ICS:
13.260 9DUVWYRSUHGHOHNWULþQLP Protection against electric
XGDURP'HORSRGQDSHWRVWMR shock. Live working
29.260.01 (OHNWULþQDRSUHPD]DGHORY Electrical equipment for
SRVHEQLKUD]PHUDKQD working in special conditions
VSORãQR in general
SIST EN 61236:1999 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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CEI
NORME
INTERNATIONALE IEC
1236
INTERNATIONAL
Première édition
DARD
STAN First edition
1993-08
pour
Selles, manchons et accessoires
sous tension
travaux
Saddles, pole clamps (stick clamps) and
accessories for live working
réservés — Copyright — all rights reserved
© CEI 1993 Droits de reproduction
No part of this publication may be reproduced or utilized in
Aucune partie de cette publication ne peut être reproduite ni
any form or by any means, electronic or mechanical,
utilisée sous quelque forme que ce soit et par aucun pro-
including photocopying and microfilm, without permission
cédé, électronique ou mécanique, y compris la photocopie et
in writing from the publisher.
les microfilms, sans l'accord écrit de l'éditeur.
Genève, Suisse
Bureau Central de la Commission Electrotechnique Internationale 3, rue de Varembé
CODE PRIX
Commission Electrotechnique Internationale
International Electrotechnical Commission J
PRICEPRICE CODE
Me>nsyuaponnaa 3neeTpoTexnugecnaa KoMuccua
IEC
catalogue en vigueur
Pour prix, voir •
•
For price, see current catalogue
---------------------- Page: 2 ----------------------
CEI 61236 IEC 61236
(First edition – 1993)
(Première édition – 1993)
Selles, manchons et accessoires Saddles, pole clamps (stick clamps)
pour travaux sous tension and accessories for live working
CORRIGENDUM 1
Page 16 Page 17
3.4 Essais mécaniques – 3.4 Mechanical tests –
Conditions générales d'essais General test conditions and results
et résultats
Page 18, sous le tableau 2, dernière Page 19, under table 2, last sentence of
phrase du paragraphe the subclause
Au lieu de: . et 3.5.4.4. Instead of: .and 3.5.4.4.
lire: . et 3.5.2.4. read: . and 3.5.2.4.
Juillet 1999 July 1999
---------------------- Page: 3 ----------------------
CEI 61236 IEC 61236
(Première édition – 1993) (First edition – 1993)
Selles, manchons et accessoires pour Saddles, pole clamps (stick clamps)
travaux sous tension and accessories for live working
CORRIGENDUM 2
Page 8 Page 9
1.2 Références normatives 1.2 Normative references
Supprimer: Delete:
Plans et règles d'échantillon-
CEI 410:1973, IEC 410:1973, Sampling plans and proce-
nage pour les contrôles par attributs dures for inspection by attributes
Ajouter les publications suivantes: Add the following publications:
CEI 61318:1994, Travaux sous tension – IEC 61318:1994, Live working – Guidelines
Guide pour les plans d’assurance de la qualité for quality assurance plans
Sampling procedures for
ISO 2859-1:1999, Règles d'échantillonnage ISO 2859-1:1999,
pour les contrôles par attributs – Partie 1: inspection by attributes – Part 1: Sampling
Procédures d'échantillonnage pour les schemes indexed by acceptance quality limit
contrôles lot par lot, indexés d'après le niveau (AQL) for lot-by-lot inspection
de qualité acceptable (NQA)
1.3.1 Termes définis selon les CEI 50(151) 1.3.1 Terms defined in accordance with
IEC 50(151) and IEC 410
et CEI 410
Au lieu de: Instead of:
... ... and IEC 410
et CEI 410
lire: read:
... et CEI 61318 ... and IEC 61318
Page 10 Page 11
1.3.1.6 défaut mineur 1.3.1.6 minor defect
Au lieu de: Instead of:
(voir 2.1.3, CEI 410). (see 2.1.3, IEC 410).
lire: read:
(voir
2.6 de la CEI 61318). (see 2.6 of IEC 61318).
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1.3.1.7 défaut majeur 1.3.1.7 major defect
Au lieu de: Instead of:
(voir 2.1.2, CEI 410). (see 2.1.2, IEC 410).
lire: read:
(voir 2.5 de la CEI 61318). (see 2.5 of IEC 61318).
1.3.1.8 défaut critique 1.3.1.8 critical defect
Au lieu de: Instead of:
(voir 2.1.1, CEI 410). (see 2.1.1, IEC 410).
lire: read:
(voir 2.4 de la CEI 61318). (see 2.4 of IEC 61318).
Page 44 Page 45
Annexe C Annex C
C.1 Généralités C.1 General
Premier alinéa First paragraph
Au lieu de: Instead of:
... dans la CEI 410. ... in IEC 410.
lire: read:
... dans l’ISO 2859-1. ... in ISO 2859-1.
Mai 2000 May 2000
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1236 ©IEC:1993 — 3 —
CONTENTS
Page
FOREWORD 5
INTRODUCTION 7
Clause
Section 1: General
1.1 Scope 9
1.2 Normative references 9
1.3 Definitions 9
Section 2: Technical characteristics
13
2.1 General
13 2.2 Dimensional and mechanical characteristics
15
2.3 Corrosion protection
Section 3: Type tests
3.1 General 17
17
3.2 Visual and functional inspection
3.3 Dimensional check 17
17 3.4 Mechanical tests — General test conditions and results
3.5 Mechanical tests — Particular requirements 19
Section 4: Sampling tests and routine tests
31
4.1 Sampling tests
33
4.2 Routine tests
Section 5: Special clauses
33
5.1 Marking
33
5.2 Modifications
33
5.3 Acceptance tests
Annexes
35
A Acceptance tests
General test procedure 37
B
45
Sampling procedure C
46
Figures
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1236 ©IEC:1993 - 5 -
INTERNATIONAL ELECTROTECHNICAL COMMISSION
SADDLES, POLE CLAMPS (STICK CLAMPS) AND
ACCESSORIES FOR LIVE WORKING
FOREWORD
The IEC (International Electrotechnical Commission) is a worldwide organization for standardization
1)
comprising all national electrotechnical committees (IEC National Committees). The object of the IEC is to
promote international cooperation 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.
The formal decisions or agreements of the IEC on technical matters, prepared by technical committees on
2)
which all the National Committees having a special interest therein are represented, express, as nearly as
possible, an international consensus of opinion on the subjects dealt with.
They have the form of recommendations for international use published in the form of standards, technical
3)
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.
The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
5)
equipment declared to be in conformity with one of its standards.
International Standard IEC 1236 has been prepared by IEC technical committee 78: Tools
for live working.
The text of this standard is based on the following documents:
Two months' procedure/
Reports on voting
Report on voting
Six months' rule
Amendment to DIS
78(CO)52
78(CO)44
78(CO)31 78(CO)38
78(CO)59 78(CO)70
Full information on the voting for the approval of this standard can be found in the reports
on voting indicated in the above table.
Annexes A to C form an integral part of this standard.
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1236 © IEC:1993
INTRODUCTION
This International Standard covers general matters. It should not be considered complete
in itself and it leaves to each customer the task of adding his own complementary
requirements. These will cover, for example, required mechanical performance and
conditions of interchangeability with equipment already in service.
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1236 ©IEC:1993 - 9 -
SADDLES, POLE CLAMPS (STICK CLAMPS) AND
ACCESSORIES FOR LIVE WORKING
Section 1: General
1.1 Scope
This International Standard is applicable to saddles and pole clamps (stick clamps) used
for live working, and to their accessories.
It specifies:
the dimensional and mechanical characteristics to be given by the manufacturer for
-
each tool;
the corresponding mechanical tests;
-
- the other points to be checked (visual, functional, marking, etc.).
1.2 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.
International Electrotechnical Vocabulary - Chapter 151: Electrical and
IEC 50(151): 1978,
magnetic devices
Sampling plans and procedures for inspection by attributes
IEC 410: 1973,
Insulating foam-filled tubes and solid rods for live working
IEC 855: 1985,
1.3 Definitions
For the purposes of this International Standard, the following definitions apply:
Terms defined in accordance with IEC 50(151) and IEC 410
1.3.1
test on one or more devices made to a certain design to show that
1.3.1.1 type test: A
the design meets certain specifications. [IEV 151-04-15]
test to which each individual device is subjected during or after
1.3.1.2 routine test: A
manufacture to ascertain whether it complies with certain criteria. [IEV 151-04-16]
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- 11 -
1236 ©IEC:1993
1.3.1.3 sampling test: A test on a number of devices taken at random from a batch.
[IEV 151-04-17]
1.3.1.4 acceptance test: A contractual test to prove to the customer that the device
meets certain conditions of its specification. [IEV 151-04-20]
rated value: A quantity value assigned, generally by a manufacturer, for a
1.3.1.5
specified operating condition of a component, device or equipment. [IEV 151-04-03]
1.3.1.6 minor defect: A minor defect is a defect that is not likely to reduce materially
the usability of the unit of product for its intended purpose, or is a departure from
established standards having little bearing on the effective use or operation of the unit
(see 2.1.3, IEC 410).
1.3.1.7 major defect: A major defect is a defect, other than critical, that is likely to
result in failure, or to reduce materially the usability of the unit of product for its intended
purpose (see 2.1.2, IEC 410).
1.3.1.8 critical defect: A critical defect is a defect that judgment and experience
indicate is likely to result in hazardous or unsafe conditions for individuals using,
maintaining or depending upon the product; or a defect that judgment and experience
indicate is likely to prevent performance of the function of a major end item (see 2.1.1,
IEC 410).
1.3.2 Definition of special terms
1.3.2.1 type of tool: Tools which have the same design and equal dimensions.
1.3.2.2 family of tools: Tools which have the same function (utilization, use, etc.).
1.3.2.3 MICDT (minor defect control test): Application of a specified force or torque
(specified in the standard) to a tool to verify whether any minor defect has occurred.
1.3.2.4 MADCT (major defect control test): Application of a specified force or torque
(specified in the standard) to a tool to verify whether any major or critical defect has
occurred.
1.3.2.5 TN : Rated torque given by the manufacturer for a tool or a part of a tool for
testing purposes.
FTN : Rated tensile force given by the manufacturer for a tool or a part of a tool
1.3.2.6
for testing purposes.
Rated bending force given by the manufacturer for a tool or a part of a tool
1.3.2.7 FBN :
for testing purposes.
1.3.2.8 FGN : Rated slippage force given by the manufacturer for a tool for testing
purposes.
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1236 © IEC:1993 - 13 -
Section 2: Technical characteristics
2.1 General
Care shall be taken to ensure that appropriate measures are taken to minimize the weight
and size of equipment to optimize their handling.
2.2 Dimensional and mechanical characteristics
2.2.1
Dimensional characteristics
For each type of tool, the manufacturer shall indicate the dimensions or operating ranges
related to the specific functions of the tool, in particular the dimensions of acceptable
supports for the saddles, and the specified diameters of acceptable pole tubes and rods
for pole clamps shall be indicated (see I EC 855).
2.2.2 Mechanical characteristics
For each type of tool, the manufacturer shall give the rated values corresponding to the
characteristics specified in table 1.
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IEC:1993 - 15 -
1236 ©
Table 1 - Mechanical characteristics for each type of tool
N GN
Rated F FTN T F
BN
value
Torque Slippage
Bending Tensile
Tool
Tightening
Chain and locking
Chain binder
device device
- Whole tool Chain and locking
Ring saddle with rigid
device
- Locking device
bracket
Whole tool Tightening
Ring saddle with - Locking device
Chain and locking device
chain bracket
device
- Whole tool Chain and locking
Lift-type saddle
device
- Locking device
Shackle
Chain and locking
Pole-type saddle - Whole tool 1)
- Locking device device
- Whole tool
Saddle extension
Mounting
Tower-type saddle - Whole tool 1)
screws
Mounting
- Whole tool 11
Crossarm-type saddle
screws
Mounting
- Whole tool
Tower-arm yoke
screws
Block saddle - Whole tool
- Whole tool
Platform pivot
attachment
Saddles and accessories - Saddle for triangular Assembly
for hydraulic tension yoke
puller - Saddle for Tenon extension
rectangular yoke
- Insulating rope Block anchoring
point
gin
Assembling 21 Mounting screw Whole tool
Pole clamp - Whole tool
Whole tool
Rigid support pole stirrup - Whole tool
Whole tool
Whole tool
Swivel support pole stirrup
Offset eye - Whole tool
11 FBN for these tools with and wi hout saddle extension.
The manufacturer shall give the values of
2) Applicable to pole clamps designed to be coupled.
2.3 Corrosion protection
Metallic parts shall be non-corrodible, either by their inherent composition or by a suitable
treatment.
Specific requirements are under consideration.
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1236 © IEC:1993
Section 3: Type tests
3.1 General
In order to show compliance of the material with this standard, the manufacturer shall
provide evidence that the following tests have been carried out successfully on a minimum
of three specimens for each type of assembly.
However, when the differences between several types of tools are limited to a few
characteristics, the tests which are not influenced by these characteristics may be
performed on only one type, and the results applied to the other types.
The different tests, and the order in which these tests are performed are given in annex B.
The tests in tables B.2, 6.3 and 8.4 shall be performed, following the specified order.
NOTE - In tables B.2, B.3 and B.4 the "type test" column includes a reference to the subclause where the
test is explained. Some columns, related to certain types of tools, are divided into sub-columns equal to the
number of mechanical destructive tests to be applied to these tools. These sub-columns also show the
sequence of tests to be applied (for an example see annex B.1).
3.2 Visual and functional inspection
Each tool shall pass the visual and functional inspection to check for manufacturing
defects and its correct function.
Any defect shall be considered as a failure and the tool shall be rejected.
3.3 Dimensional check
Each tool shall be checked by measurement to ensure that it complies with the dimensions
and tolerances as agreed to between customer and manufacturer.
3.4 Mechanical tests - General test conditions and results
The tensile, bending, and slippage force, and the torque values given in table 2 shall be
FTN/s, FBN GN/s and TN
progressively applied in increments at a rate of (0,1 ± 0,025) /s, F /s
until the values of 1,25 FTN , 1,25 FBN , 1,25 FGN and 1,25 TN are reached.
Each value shall then be maintained for 1 min before the results are noted.
These force and torque values shall then be increased again at the same rate as above
N
until the values of 2,5 FTN , 2,5 FBN , 1,5 FGN and 2,5 T are reached. Each value shall be
maintained for 1 min before the results are noted again.
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1236 © IEC:1993
Table 2 - General test information
MADCT
MICDT
Test
Force or Results
Force or Results
torque
torque
(see note) (see note)
FTN b FTN a 2,5 Tensile 1,25
2,5 FBN b
1,25 FBN a
Bending
a 2,5 TN b
Torsion 1,25 TN
c 1,5 FGN c
Slippage 1,25 a and
FGN
NOTES
no permanent deformation, or minor, major or critical defect shall occur;
a
b no major or critical defect shall occur;
no slippage of the tool shall occur on its support.
c
All these test conditions and results shall apply to 3.5, except for 3.5.2.3 and 3.5.4.4.
3.5 Mechanical tests - Particular requirements
3.5.1 Locking device with chain or strap
Tensile test
3.5.1.1
The locking device with chain or strap is attached to a fixed support and load applied (see
figure 1 a). The results are then noted.
3.5.1.2 Bending test
at an angle of 45° to the
The locking device with chain or strap is fixed on a suppo rt
equal to 0,9 FTN is applied (see figure 1 b) and the
direction of the force FBN . A load FBN
results noted.
Chain binder
3.5.2
3.5.2.1 Tensile test
The hand wheel shall be in a full tightening position. The end of the chain shall be locked
in the locking device to obtain a loop (see figure 2a). The tensile force shall be applied by
FTN which shall be maintained
means of two 30 mm diameter rods until it reaches 2,5
for 1 min. No minor, major or critical defect shall occur. Then the force shall be increased
again until it reaches 5
FTN.
No major or critical defect shall occur.
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1236 ©IEC:1993 - 21 -
The 1,25 and 2,5 coefficients are applicable to each leg of the loop. Therefore, the total
force applied shall be doubled.
3.5.2.2 Bending test on the locking device
rt (a
The previous test shall be resumed after having fixed the locking device on a suppo
rod with a flat part) at an angle of 45° to the direction of the force FBN (see figure 2b).
FBN
is applied. The force is increased until it reaches 2,5
A force FBN equal to 0,9 FTN
which shall be maintained for 1 min. No minor, major or critical defect shall occur. Then
the force shall be increased until it reaches 5 FBN.
No major or critical defect shall occur.
3.5.2.3 Test on the retractable spring
The hand wheel is fully retracted and the body of the tightening device is maintained in a
rtical position (see figure 2c).
ve
A ve rtical tensile force is applied on the tightening device rod.
The test is successful if the value of the force to achieve full compression of the spring is
greater than 120 N, but less than 180 N.
Tightening test
3.5.2.4
The chain binder is set on a 160 mm diameter metallic cylinder (see figure 2d). The chain
binder is maintained in position by the retractable spring of the tightening device. Then the
tightening torque is applied and the results noted.
3.5.3 Ring saddle with rigid bracket
Bending test on the whole saddle
3.5.3.1
The saddle is set on the least suitable support agreed to by the manufacturer and the
customer (wood, concrete or metal) with a chain binder. The hand wheel is then tightened
with a torque of (30 ± 3) Nm. Then the bending force is applied and the results noted (see
figure 3).
Tensile test on the locking device
3.5.3.2
(See 3.5.1.1.)
3.5.3.3 Bending test on the locking device
(See 3.5.1.2.)
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1236 ©IEC:1993
Ring saddle with chain bracket
3.5.4
Tensile test on the whole saddle
3.5.4.1
The saddle is set on the least suitable support agreed to by the customer and the
manufacturer (wood, concrete, metal), with a chain binder. The hand wheel is then
tightened to a torque of (30 ± 3) Nm. The tensile force is applied on one of the rings and
the results noted (see figure 4).
Further tests for ring saddles
3.5.4.2
- Tensile test on the locking device (see 3.5.2.1)
Bending test on the locking device (see 3.5.2.2)
-
- Test on the retractable spring (see 3.5.2.3)
- Tightening test (see 3.5.2.4)
3.5.5 Lift-type saddle
Bending test on the whole saddle
3.5.5.1
The saddle is mounted on the least suitable support agreed to by the manufacturer and
the customer (wood, concrete or metal) with a chain binder. The hand wheel is then
tightened to a torque of (30 ± 3) Nm. The extremity of the handle is supported horizontally
by the handle prop resting against a hard wood block between the handle prop and the
support (see figure 5a).
The bending force shall then be applied and the results noted.
3.5.5.2 Tensile test on the shackle (butt ring)
The shackle, with pin, is placed on a tensile test bench (see figure 5b). The pin of the
shackle is fixed by a tenon of the same width as that of the handle. The tensile force shall
then be applied and the results noted.
Further tests for lift-type saddles
3.5.5.3
- Tensile test on the locking device (see 3.5.1.1)
- Bending test on the locking device (see 3.5.1.2)
3.5.6 Pole-type saddle
Bending test on the whole saddle
3.5.6.1
The saddle is mounted on the least suitable support agreed to by the manufacturer and
the customer (wood, concrete or steel), with a chain binder. The hand wheel is then
tightened to a torque of (30 ± 3) Nm. (see figure 6). The bending force shall then be
applied and the results noted.
Additional tests for pole-type saddles
3.5.6.2
- Tensile test on the locking device (see 3.5.1.1)
Bending test on the locking device (see 3.5.1.2)
-
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1236 ©IEC:1993 - 25 -
3.5.7 Saddle extension
Bending test
The saddle extension is mounted on the corresponding saddle or a support having the
same shape (see figure 7a for an example of a support). The holding-down bolt of the
extension is tightened to a torque of (15 ± 1,5) Nm. The bending force shall be applied
vertically and the results noted (see figure 7b).
3.5.8 Tower-type saddle
3.5.8.1 Bending test
The tower-type saddle is mounted on a steel angle (or an assembly of two steel angles)
having the capability to support the maximum rated capacity. The wing-nuts (thumb-nuts)
are tightened to a torque of (20 ± 2) Nm. The bending force shall then be applied parallel
to the axis of the steel angle and the results noted (see figure 8).
3.5.8.2 Tightening test
The saddle is mounted on the same assembly as for the previous test. The tightening
torque shall be applied to the wing-nuts (thumb-nuts) and the results noted.
3.5.9 Crossarm-type saddle
3.5.9.1 Bending test
The saddle is mounted on the least suitable crossarm (minimum width, maximum
thickness). The mounting screws are set to their maximum spacing and the wing-nuts
(thumb-nuts) tightened to a torque of (20 ± 2) Nm. The force shall be applied on the swivel
(see figure 9a).
In addition, no slippage shall occur on the support.
3.5.9.2 Tightening test
The saddle is mounted on the same crossarm as for the bending test and the mounting
screws are set to their maximum spacing (see figure 9b). The tightening torque shall be
applied to the wing-nuts and the results noted.
3.5.10 Block saddle
3.5.10.1 Bending test
The block saddle shall be mounted on the largest designed steel angle. The wing-nuts
(thumb-nuts) shall be tightened to a torque of (20 ± 2) Nm. A rope is attached to the cleat.
The force shall be applied with the rope at an angle of 15° to the steel angle (see
figure 10) and the results noted.
In addition, no slippage shall occur on the support.
3.5.10.2 Tightening test
Same test as for the tower-type saddle given in 3.5.8.2.
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1236 ©IEC:1993 - 27 -
3.5.11 Tower-arm yoke
Bending test
The tower-arm yoke shall be supported by a pulling yoke. Its width shall be agreed by the
customer and the manufacturer such that the pulling yoke fits between legs 1 and 2 at
their closest position (see figure 11). The distance between the jack screws shall be set at
maximum. The clevis end of each jack screw is fixed to a support. The force shall be
applied and the results noted.
NOTE - The tensile force on each jack screw is equal to F/2.
3.5.12 Platform pivot attachment
Bending test
- On inner flange of steel angle
The platform pivot attachment, equipped with a tower-type saddle to fit the inner flange
of steel angle, is set on the largest size of steel angle as agreed between to the
customer and the manufacturer. The wing-nuts (thumb-nuts) shall be tightened to a
torque of (25 ± 2,5) Nm. The bending force shall be applied, in the axis of the pivot
BN (see figure 12a) and the results noted.
bearing, until it reaches 1,25 F
No permanent deformation, no minor, major or critical defect shall occur. The test is
then considered complete.
- On outer flange of steel angle
The platform pivot attachment equipped with a tower-type saddle to fit the outer flange
of steel angle, is set on the largest size of steel angle as agreed between the customer
and the manufacturer. The wing-nuts (thumb-nuts) shall be tightened to a torque
of (25 ± 2,5) Nm.
Force shall be applied in the axis of the pivot bearing (see figure 12b) and the results
noted.
Saddles and accessories for hydraulic tension puller
3.5.13
NOTE - There are many different kinds of sets of tools for hydraulic tension puller according to the
characteristics of the network components and the type of insulator strings and yokes (single- or double-
suspension string, double-, triple- or quadruple-tension string).
In this subclause the principle of tests to be carried out is only given for one example.
3.5.13.1 Tensile test on the whole tool
The assembly of the saddles and accessories for hydraulic tensile puller shall be
supported on the test bench with the conductor end yoke fixed to a common support (see
figure 13a). Force shall be applied and the results noted.
3.5.13.2 Saddles and other components
The following tests shall be carried out on the components used with the hydraulic tension
puller.
Bending test on the saddle for triangular conductor yoke
3.5.13.2.1
The saddle shall be mounted on a fixed triangular conductor yoke plate. A force equal
to FBN/2 is applied to each jack rod and the results noted (see figure 13b).
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Bending test on the saddle for rectangular yoke
3.5.13.2.2
The saddle shall be mounted on a fixed rectangular conductor yoke plate. A force equal to
/2 is applied to each tenon extension and the results noted (see figure 13c).
FBN
3.5.13.2.3 Tensile test on the tenon extension
The tensile force shall be applied to the tenon extension and the results noted (see
figure 13d).
Bending test on the insulating rope gin
3.5.13.2.4
The bending force shall be applied to the insulating rope gin at the position to give the
maximum bending load and the results noted (see figure 13e).
Tensile test on the block anchoring point of insulating rope
3.5.13.2.5
The tensile force shall be applied to the block anchoring point and the results noted (see
figure 13f).
Pole clamp (stick clamp)
3.5.14
3.5.14.1 Slippage test
The pole clamp shall be mounted on an insulating tube or rod having the largest size
diameter for the clamp and in compliance with IEC 855. The tube is coated with a
silicone-base waterproofing product. The fastening device shall be tightened to a torque of
17 Nm.
The tensile force shall be applied parallel to the axis of the tube without movement of the
wing-nut and the results noted (see figure 14a).
Next, the force is maintained at a constant value, the pole clamp is loosened and a
gradual, controlled slippage shall occur between the clamp and the insulating tube.
3.5.14.2 Bending test (MADCT)
The pole clamp shall be mounted on a metal tube or rod having the largest size diameter
for the clamp. The pole clamp shall be mounted against the limit stop. The bending force
shall be applied parallel to the axis of the tube and the results noted (see figure 14b).
3.5.14.3 Torque test
The pole clamp shall be mounted on a metal tube or rod having the largest size diameter
for the clamp. The torque shall be applied on the wing-nut (thumb-nut) and the results
noted.
3.5.14.4 Tensile test on the assembling
This test is applicable to pole clamps designed to be coupled with pole clamps of the
same type.
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The test piece assembly is made with two pole clamps of the same type positioned on a
metal tube or rod (see figure 14c). The tensile force shall be applied in the direction of the
axis of the assembling screw and the results noted.
NOTE - In use, when the assembly consists of two different types of pole clamps, the lower value of FTN
applies.
3.5.15 Suppo
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