SIST HD 329 S1:2000
(Main)Tests on hollow insulators for use in electrical equipment
Tests on hollow insulators for use in electrical equipment
Applies to insulating weather shields and containers made of ceramic material or glass before any metal fittings are attached intended for use in electrical equipment operating on d.c. or a.c., such as instrument transformers, lightning arresters. capacitors, bushings, cable sealing ends and circuit-breakers.
Prüfungen an Hohlisolierkörpern zur Verwendung in elektrischen Betriebsmitteln
Essais des enveloppes isolantes destinées à des appareils électriques
S'applique aux enveloppes isolantes et isolateurs creux en matière céramique ou en verre avant fixation de toute armature métallique, destinés à l'équipement d'appareils électriques fonctionnant en courant continu ou alternatif tels que transformateurs de mesures, parafoudres, condensateurs, traversées, extrémités de câbles et disjoncteurs.
Tests on hollow insulators for use in electrical equipment (IEC 60233:1974)
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This International Standard applies to string insulator units of the cap and pin type with
insulating parts of ceramic material or glass, intended for AC overhead lines with a nominal
voltage greater than 1 000 V and a frequency not greater than 100 Hz. It also applies to
insulators of similar design used in substations.
This document applies to string insulator units of the cap and pin type either with ball and
socket couplings or with clevis and tongue couplings.
This document applies to string insulator units for use on overhead lines in clean areas and
polluted areas. For use in areas characterized by very heavy pollution levels and for other
particular or extreme environmental conditions, it may be necessary for certain dimensions to
be changed and insulator units having different creepage distances, spacing and forms may
be preferred (for example, flat profile, hemispherical etc.). Insulators for use on DC systems
may also need different dimensions. In any case, it is applicable that the standardized
mechanical characteristics of this document and coupling sizes are retained.
The object of this document is to prescribe specified values for the mechanical characteristics
and for the main dimensions of string insulator units of the cap and pin type.
The power frequency, lightning impulse and puncture withstand voltages of string insulator
units are not specified in this document. IEC 60383-1 gives the electrical characteristics which
define string insulator units; their values are agreed between purchaser and manufacturer.
Ball and socket couplings are covered by IEC 60120, clevis and tongue couplings by
IEC 60471.
NOTE For the definition of site pollution severity see IEC TS 60815-1.
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This International Standard is applicable to string insulator units of the long rod type with
insulating parts of ceramic material intended for use in AC overhead power lines with a
nominal voltage greater than 1 000 V and a frequency not greater than 100 Hz. It is also
applicable to insulators of similar design, used in substations.
This document is applicable to ceramic string insulator units of the long rod type, either with a
clevis end fitting at both ends for coupling with a tongue, or with a socket end fitting at both
ends for coupling with a pin ball.
The object of this document is to prescribe specified values for electrical and mechanical
characteristics, and for the principal dimensions of ceramic string insulator units of the long
rod type.
This document is applicable to string insulator units for use on overhead lines situated in
lightly polluted areas, and the creepage distances given in Table 1 have been established
accordingly, using the IEC TS 60815-2 recommendation of 27,8 mm/kV for SPS class.
However, shorter creepage distances are applicable for use in some non-polluted areas. If
specific operating conditions require or allow non-standard (longer or shorter) creepage
distances, the mechanical characteristics as well as the lengths L (see Clause 4) of this
document are intended to be used unless the need for exceptionally long creepage distances
requires values of L greater than those given in Table 1. In the case of special requirements,
e.g. very heavy polluted areas and for other particular or extreme environmental conditions, it
may be necessary for certain dimensions to be changed.
As far as reasonably applicable, this document is also applicable to be applied to similar
insulator units outside the scope of this standard, such as insulators for electric traction lines.
This document does not include tests on insulators and dimensions of end fittings.
Ball and socket couplings are covered by IEC 60120, clevis and tongue couplings by
IEC 60471.
NOTE 1 For the definition of site pollution severity, see applicable part of IEC TS 60815.
NOTE 2 The term "ceramic" is used in this document to refer to porcelain materials and, contrary to North
American practice, does not include glass.
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The object of this international standard is to define the dimensions of a series of standard
ball and socket couplings using the standard locking devices (see IEC 60372) in order to
permit the assembly of insulators or metal fittings supplied by different manufacturers.
This document applies to string insulator units of the cap and pin and long rod types and their
associated metal fittings.
For the pin ball and the socket, dimensions apply to the finished product after any surface
treatment.
Extreme positions of the pin ball in the socket are given in Annex A.
Typical examples of gauges for checking the dimensions of pin balls and sockets are given in
Annex B.
NOTE Only the dimensions necessary for assembly are dealt with in this standard. Properties of material and
working loads are not specified. The co-ordination of dimensions with strength classes is specified in IEC 60305
and IEC 60433.
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This international standard applies to string insulator units of the cap and pin type and also of
the long rod type as well as the fittings used with such insulators.
The object of this document is to define the dimensions of a series of clevis and tongue
couplings to permit the assembly of insulators or fittings supplied by different manufacturers.
NOTE 1 IEC 60305 gives the coordination between the standardized dimensions of Table 1 and the strength
classes of cap and pin insulator. IEC 60433 gives the coordination between the standardized dimensions of Table 2
and the strength classes of long rod insulators.
NOTE 2 If the dimensions given in Table 1 are not sufficient, higher strength classes are given in IEC 60305.
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This international standard is applicable to locking devices used with ball and socket
couplings of string insulator units and used with the corresponding metal fittings standardized
in IEC 60120, when they are supplied separately.
When these locking devices are supplied with an insulator or fitting, they are considered as an
integral part of it. In this case, the relevant test is to be included with those of insulators, as
specified in IEC 60383-1 and IEC 61325. On request, a certificate is to be delivered
confirming that the tests on locking devices as specified in this document have been carried
out. The locking devices are usually supplied with the insulator or corresponding metal fittings.
The object of this document is
• to define the shapes and some standard dimensions for locking devices,
• to define the test methods for locking devices,
• to state the acceptance conditions for supply,
• to give other dimensions for guidance of manufacturing only.
The object of this document does not include the specification of the nature of the material,
and the material covered by the scope of this document does not have a surface coating for
corrosion protection. However, the material which will give rise to significant contact
corrosion(chemical reaction) between the locking device and the ball and socket coupling
does not covered by this document.
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This document is applicable to composite line post insulators for AC overhead lines with a nominal voltage greater than 1 000 V and a frequency not greater than 100 Hz. It also applies to line post insulators of similar design used in substations or on electric traction lines. This document applies to line post insulators of composite type, generally with metallic couplings, with and without a base plate. It also applies to such insulators when used in complex structures. It does not apply to hollow insulators adapted for use as line post insulators. The object of this document is to specify the main dimensions of the couplings to be used on the composite line post insulators in order to permit the assembly of insulators or fittings supplied by different manufacturers and to allow, whenever practical, interchangeability with existing installations. It also specifies a standard designation system for composite line post insulators.
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IEC - Corrected version
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This International Standard applies to composite hollow core station post insulators consisting
of a load-bearing insulating tube (core) made of resin impregnated fibres an insulating filler
material (e.g. solid, liquid, foam, gaseous – pressurized or unpressurized), a housing (outside
the insulating tube) made of polymeric material (for example silicone or ethylene-propylene)
and metal fixing devices at the ends of the insulating tube. Composite hollow core station post
insulators as defined in this standard are intended for general use in substations in both,
outdoor and indoor environments, operating with a rated AC voltage greater than 1 000 V and
a frequency not greater than 100 Hz or for use in direct current systems with a rated voltage
greater than 1 500 V.
The object of this standard is:
– to define the terms used;
– to prescribe test methods;
– to prescribe acceptance criteria.
All the tests in this standard, apart from the thermal-mechanical test, are performed at normal
ambient temperature. This standard does not prescribe tests that may be characteristic of the
apparatus of which the composite hollow core station post insulator ultimately may form a
part. Further technical input is required in this area.
NOTE 1 "Pressurized" means a permanent gas or liquid pressure greater than 0,05 MPa (0,5 bar) gauge. The gas
can be dry air or inert gases, for example sulphur hexafluoride, nitrogen, or a mixture of such gases.
NOTE 2 "Unpressurized" means a gas or liquid pressure smaller than or equal to 0,05 MPa (0,5 bar) gauge.
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Prescribes specified values for the mechanical characteristics of the composite string insulator units. Defines the main dimensions of the couplings to be used on the composite string insulator units in order to permit the assembly of insulators of fittings supplied by different manufacturers and to allow, whenever practical, interchangeability with existing installations. It also defines a standard designation system for composite string insulator units.
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