 |
| Purchase Information |
| Use this form to request purchase information on IEC online subscriptions. |
|
|
Document IEC 60305 is offered by IHS as part of an online subscription. This subscription contains many documents on the same topic.
You may also purchase this document alone from the IHS Standards Store.
IEC 60305 Document Information:
Title
Insulators for Overhead Lines with a Nominal Voltage Above 1 000 V - Ceramic or Glass Insulator Units for A.C. Systems - Characteristics of Insulator Units of the Cap and Pin Type
Isolateurs pour lignes aériennes de tension nominale supérieure à 1000 V - Eléments d'isolateurs en matière céramique ou en verre pour systèmes à courant alternatif - Caractéristiques des éléments d'isolateurs du type capot et tige
International Electrotechnical Commission
Publication Date:
Dec 1, 1995
Scope:
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 normal 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 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 standard. IEC 383-1 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 120, clevis and tongue couplings by IEC 471.
NOTE – For the definition of pollution levels see IEC 815.
About IHS
IHS (NYSE: IHS) is a leading global provider of critical technical information, decision-support tools and related services in a number of industries including aerospace and defense, automotive, construction, electronics, and energy. IHS serves customers ranging from large governments and multinational corporations to smaller companies and technical professionals in more than 100 countries. IHS been in business for more than 45 years and employ more than 2,300 people around the world.
