What is Creepage and Clearance Distance of Insulator?
In high voltage
What is creepage:
The distance measure of along the surface of the solid insulating material is called creepage distance. The creepage distance is depending upon the weather condition. Minimum creepage distance are 16-25 mm/kV. For high pollution area, these value must be increased.
|S No.||Degree of Pollution||Recommended Creepage Distance for Insulators|
|1||Clean areas||16 mm/kV|
|2||Moderately polluted areas||20 mm/kV|
|3||Industrial areas||22 mm/kV|
|4||Heavily polluted areas||25 mm/kV +|
What is clearance:
Distance between two terminal of the high voltage insulator is called clearance distance. Clearance shall be dimensioned to withstand the required impulse withstand voltage, in accordance to table “Clearances to withstand transient overvoltages”.
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