What is BS EN IEC 60433 about?
BS EN IEC 60433 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.
BS EN IEC 60433 is also applicable to insulators of similar design, used in substations.
BS EN IEC 60433 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 pinball.
BS EN IEC 60433 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.
BS EN IEC 60433 does not include tests on insulators and dimensions of end fittings.
NOTE: The term "ceramic" is used in this document to refer to porcelain materials and, contrary to North American practice, does not include glass.
Who is BS EN IEC 60433 for?
BS EN IEC 60433 on ceramic insulators for overhead lines is relevant to:
- Manufacturers of string insulator units
- Electrical engineers
- Companies involved with power transmission and distribution lines
- Industries working with high-voltage transmission lines
Why should you use BS EN IEC 60433?
Long rod insulator is a suspension or tension insulator consisting of an approximately cylindrical insulating part provided with sheds and equipped at the ends with external metal fittings.
Under BS EN IEC 60433, string insulator units of the long rod type are characterised by:
- Wet power frequency withstand voltage
- Tensile mechanical failing load
- Maximum nominal length L of the insulator
- Maximum nominal diameter D of the insulating part
- Minimum nominal creepage distance
- Standard coupling
Based on their designation, the corresponding values for these parameters are provided in BS If you are a manufacturer, compliance with standardised parameters for string insulators of the long rod type can impart a high degree of consistency and uniformity in your production processes. This can further enhance credibility and reliability for your products and the end-use application.
What’s changed since the last update?
BS EN IEC 60433:2021 replaces the third edition published in 1998. The significant technical change is:
- More specified mechanical failing loads included in Table 1
