IEC 60383-1:1993 pdf download.Insulators for overhead lines with a nominal voltage above 1 000 V Part 1: Ceramic or glass insulator units for a.c. systems — Definitions, test methods and acceptance criteria.
This part of lEG 383 is divided into nine sections.
The first five sections cover general clauses, including general requirements and relevant test procedures.
Sections six to nine deal with four different types of insulators:
Section 6: Pin insulators
Section 7: Line post insulators
Section 8: String insulator units
Section 9: Insulators for overhead electric traction lines.
Sections 6, 7 and 8 begin with a cross-reference table giving the tests applicable to the insulators and the quantity of insulators to be tested.
Section 9, dealing with traction insulators, does not have a cross-reference table as
This part of lEG 383 applies to insulators of ceramic material or glass for use on a.c. overhead power lines and overhead traction lines with a nominal voltage greater than 1 000 V and a frequency not greater than 100 Hz.
It also applies to insulators for use on d.c. overhead electric traction lines.
This part applies to string insulator units, rigid overhead line insulators and to insulators of similar design when used in substations.
It does not apply to insulators forming parts of electrical apparatus or to parts used in their construction or to post insulators which are covered by lEG 168: Tests on indoor and outdoor post insulators of ceramic material or glass for systems with nominal voltages greater than 1 000 V.
It may be regarded as a provisional standard for insulators for use on d.c. overhead power
5 IdentIfication of insulators
Each insulator shall be marked, either on the insulating component or on a metal part, with the name or trade mark of the manufacturer and the year of manufacture. In addition, each string insulator unit shall be marked with the specified electromechanical or mechanical failing load whichever is applicable. These markings shall be legible and indelible.
The designations included in IEC 305, IEC 433 and IEC 720 may be used.
10.1 Standard reference atmosphere
The standard reference atmospheric conditions shall be in accordance with lEG 60-1.
10.2 Correction factors for atmospheric conditions
The correction factors shall be determined in accordance with IEC 60-1. If the atmospheric conditions at the time of test differ from the standard reference atmosphere, then the correction factors for air density (k1) and humidity (k2) shall be calculated and the product K= k1 x k2 determined. The test voltages shall then be corrected as follows.IEC-60383-1-1993