Insulator PDF
Porcelain station post insulator C4-250
Porcelain station post insulator C4-250 is outdoor used high voltage insulator, and mainly used on substations. It is wet processed and also belong to traditional insulators, but different from other insulators, such as porcelain disc suspension insulator, porcelain pin insulator which are used on power transmission and distribution lines, the porcelain station post insulator is only used on substations and some electrical apparatus.
What does porcelain station post insulator C4-250 mean:
C4 means the cantilever strength is 4KN
250 means lightning impulse withstand voltage of the insulator.
Cantilever strength and lightning impulse withstand voltage is the main parameter for porcelain station post insulator, and only these two value can decide the insulator type.
Except porcelain station post insulator C4-250, there are also other types for 250kv lightning impulse withstand voltage, that is C6-250, C8-250, C10-250, C12.5-250, those means 6KN, 8KN, 10KN, 12.5KN, all these are specified on IEC 60273 international standard.
Porcelain station post insulator C4-250
Parameter of porcelain station post insulator C4250:
Cantilever strength: 4KN
Lightning impulse withstand voltage: 250KV
Power frequency withstand voltage wet: 95KV
Height of insulator: 560mm
Creepage distance: 835mm, 1200mm
Fixing diameter of end fitting hole: 76 or 127mm
Porcelain station post insulator C4-250 is a commonly used substation insulator, and normally it is brown color, but sometimes customer will also need grey color like most of ANSI standard station post insulator. We look forward your enquiry from us for insulator price.
