What is the difference between station post insulator and line post insulator?
Station post insulator power frequency ac voltage is 40.5 kv to 550 kv. According to technological standard ANSI C29.9 and IEC, station post insulator cantilever strength in the range of 4kn-18kn, can be used for 15kv-750kv substation. Station post insulator in shape is different from other types of insulator is on both ends of the hardware and flanch are the same. This type of design for station post insulator in response to higher voltage class through mutual connection meets the requirements.
Porcelain Station post insulator according ANSI standard models are mainly: TR-202, TR-205, TR-208, TR-210, TR-214, TR-216, TR-286, TR-287, TR-288, TR-289, TR-291, TR-304, TR-312, TR-362, TR-369, and TR391.
Porcelain Line post insulator used is highest voltage level of 132kv, lower than the station post insulator. The used of the some line post insulator with porcelain pin insulator are the same. Line post insulator is the not breakdown type. Line post insulator according to top whether has the shape of the hardware and the hardware can be divided into four types: Tie top line post insulator, vertical clamp mounting direction, horizontal clamp mounting direction and inclined horizontal clamp mounting direction.
Station post insulator is used on the station; line post insulator is used on the line. Power station post insulator and line post insulator on the shape have significant difference; hardware at the ends of station post insulator is to be connected to other power station post insulator, top of the column line post insulator hardware for fixed conductor. station post insulator of higher voltage level as well.