Izolátory

Oblast zaměření: Izolátory
Komise : IEC/TC 36 (Insulators)
Původce: ISO\IEC\CEN\CENELEC
K připomínkám do: 6.02.2020
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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 a.c. 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 sub stations.

This Standard applies to string insulator units of the cap and pin type either with ball and socket couplings or with clevis and tongue couplings.

This Standard 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 d.c. systems may also need different dimensions. In any case, it is recommended that the standardized mechanical characteristics of the present International Standard and coupling sizes are retained.

The object of this Standard 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 International Standard. IEC 60383-1 gives the electrical characteristics which define string insulator units; their values shall be 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 pollution levels see IEC 60815-1.

 

Oblast zaměření: Izolátory
Komise : IEC/TC 36 (Insulators)
Původce: ISO\IEC\CEN\CENELEC
K připomínkám do: 6.02.2020
Zobraz více Zobraz méně
 

This International Standard is applicable to string insulator units of the long rod type with insulating parts of ceramic material intended for use in a.c. overhead power lines with a nominal voltage greater than 1000 V and a frequency not greater than 100 Hz. It is also applicable to insulators of similar design, used in substations.

This standard 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 standard 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 standard 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 60815 recommendation of 16 mm/kV for pollution level I. However, shorter creepage distances may be used 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 standard should 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.


NOTES

1 As far as reasonably applicable, this International Standard may also be applied to similar insulator units outside the scope of this standard, such as insulators for electric traction lines.

2 This International Standard does not include tests on insulators and dimensions of end fittings.

3 Ball and socket couplings are covered by IEC 60120, clevis and tongue couplings by IEC 60471.

4 For the definition of pollution levels, see applicable part of IEC 60815.

5 The term "ceramic" is used in this International Standard to refer to porcelain materials and, contrary to North American practice, does not include glass.