This standard specifies the codes, working conditions, technical requirements, test methods, inspection rules, acceptance rules, packaging and marking etc. of section insulator.
It is applicable to section insulator at same-phase electric subsection of 25kV single-phase power-frequency a.c. overhead contact system of electric railways.
2 Normative References
The provisions of the following standard, through reference in this standard, constitute the provisions of this standard. At the time of publication for this standard, all editions indicated are valid. All standards will be revised. All parties coming to an agreement according to this standard are encouraged to study whether the latest edition of the normative document is applicable.
GB/T 775.1-1987 Test Method for Insulators - Part 1: General Test Methods
GB/T 775.2-1987 Test Method for Insulators - Part 2: Electrical Test Methods
GB/T 1411-1978 Solid Electric Insulating Materials - Test Methods of High-voltage Small-current Intermittent Arc Resistance
GB/T 2900.8-1995 Electrotechnical Terminology - Insulators
GB/T 4585.2-1991 Artificial Pollution Tests on High-voltage Insulators to be Used on a.c. Systems - Solid-layer Method
GB/T 6553-1986 Test Methods for Evaluating Resistance to Tracking and Erosion of Electrical Insulating Materials Used under Severe Ambient Conditions
TB/T 2073 Technical Specification of Fittings for Overhead Contact System in Electrification Railway
TB/T 2074 Test Methods of Fittings for Overhead Contact System in Electrification Railway
3 Definitions
This standard adopts the following definitions:
slideway type section insulator: it refers to the section insulator of which all or part insulating elements are adopted as of slideway simultaneously and which directly contacts with pantograph of electric locomotive during operation
non-slideway type section insulator: it refers to the section insulator of which insulating elements are not adopted as slideway and which does not contact with pantograph of electric locomotive during operation
