4. Characteristics of a chain element or rigid insulator
Table 2 gives the main geometrical characteristics of insulators with ball-and-socket joints.
Among the values specified in insulator test standards, the most characteristic are :
electromechanical or mechanical breaking load: for cap-and-rod insulators, this breaking load (expressed in kN) designates the insulator and defines the assembly standard (IEC 60120 publication);
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the following geometric dimensions :
the pitchp, which corresponds to the distance separating two homologous parts of two consecutive chain elements in a chain of insulators; this pitch can therefore be used to determine the length of a chain with a given number of insulators;
the creepage...
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Characteristics of a chain element or rigid insulator
Isolator chains
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Standardization
French standards
- Ceramic insulators (high voltage) – Solid shaft insulators with rod mounting (CHT). - NF C66-133 - Avril 1969
- Ceramic insulators (high voltage) – Solid barrel insulators with calibrated head (CHT...C). - NF C66-134 - Avril 1969
- Insulators and equipment for overhead lines – Glass...
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