China Porcelain Spool Insulator Ceramic Shackle Insulator, Find details about China Spool Insulator, Shackle Insulator from Porcelain Spool Insulator Ceramic Shackle Insulator
Ambient temperature | -40°C~+40°C |
AC power supply frequency | ≤100 HZ |
Earthquake intensity | ≤8 |
Altitude | ≤1500 m |
Maximum wind velocity | ≤35 m/s |
Spool insulator - A dead end or anchor pole or tower is used where a straight section of line ends, or angles off in another direction. These poles must withstand the lateral (horizontal) tension of the long straight section of wire. In order to support this lateral load, strain insulators are used. For low voltage lines (less than 11 kV), shackle insulators are used as strain insulators. However, for high voltage transmission lines, strings of cap-and-pin (disc) insulators are used, attached to the crossarm in a horizontal direction. When the tension load in lines is exceedingly high, such as at long river spans, two or more strings are used in parallel.