High voltage insulator technical requirements 4.
1 basic requirement for high voltage insulator products besides should comply with the technical requirements of this standard, other features should comply with the provisions of GB/T5892 standard.
2 end annex high voltage insulator end zinc layer shall comply with the provisions of the JB/T8177.
Its structure, such as connecting the ball and socket or slot type, connection structure size should comply with the provisions of GB/T4056.
Ball and socket or slot type connector mechanical tensile failure load should comply with the provisions of the JB/T8178.
Steel foot or groove fittings of mechanical tensile failure load should comply with the 'B / 1 '9677.
Products to more than 160 kn and should only check the zinc layer and fault detection.
4 3 umbrella cover material.
1, flame retardant high voltage insulator with umbrella cover material should reach the flame retardancy of GB/T13488 FV - prescribed standards
The requirement of level 0.
2 monk water-based high voltage insulator with umbrella cover material water shall meet the requirements of appendix A of monks.
3 electrical and mechanical properties of high voltage insulator with umbrella cover material of the main electrical and mechanical performance shall meet the following requirements: a)
Volume resistivity is not less than 1 x 1 0 & quot;
Breakdown strength is not less than 20 kv/mm;
Tracking and electrical erosion resistance is not lower than TMA4.
Level 5: d)
The tear strength is not less than 7 kn/mDL/T864 -
Mechanical breaking strength is not less than 3 mpa;
Snap god to make rate of not less than 100%;
Shaw hardness of not less than 5004.
4 core rod composite insulator
mandrel shall meet the following test requirements: a)
Bibulous rate is less than 0.
Dry power frequency withstand voltage should satisfy B in appendix B.
Article 3 the requirements;
Lightning impulse withstand voltage of not less than 90 kv (
The tensile strength is not less than 1000 mpa;
Resistance to stress corrosion time not less than 96 h, tensile fracture load test are not more than 10%;
Dye penetrant test should meet the requirements of GB/T5892;
Water diffusion test should meet the requirements of GB/T5892.
5 corona and the radio interference level high voltage insulator should satisfy corona test requirements.
1 in the regulations.
1 um/m (
Um to * high line voltage)
Under voltage, high voltage insulator radio interference level should not be greater than 60 db.
6 artificial contamination power frequency withstand voltage high-voltage insulator shall meet the requirements of artificial defile the power frequency withstand voltage test.
Under the given contour with salt density of artificial contamination power frequency withstand voltage shall meet the requirements for its operation.
7 arc power frequency high voltage insulator should meet the requirements of power frequency arc tests.
The design of high voltage insulator metal accessories should consider the effect of electric arc.
The size of the short circuit current and current duration may cause damage of end fittings, mandrel and umbrella skirt, shall be designed with the appropriate arc protection device.
8 interface permeability high voltage insulator should satisfy mechanical load time test and metal accessories and insulated protection suites interface permeability test requirements, and shall meet the validation of metal accessories and umbrella suites interface permeability and verify the rated mechanical load requirements.
9 at school just when the high voltage insulator used in the altitude of more than 1000 m, the external insulation should press GB311.
1 the provisions of the school iFo 【
On a message: composite insulator selection principle, the selection of composite insulator 】
A message: under high voltage insulator terms and definitions:
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