Design and manufacture of porcelain cross arm insulator
Porcelain cross arm is a conical or cylindrical porcelain insulators for overhead power line, also known as porcelain insulator crossarm. It has a fixed wire and the same as ordinary line insulator and insulation function, also can completely or partially replace the iron or wooden crossarm.
Porcelain cross arm with a metal accessories and without metal accessories two. With a metal accessory cross arm medium voltage applications more and above voltage porcelain. There are two hole accessory, a hole for fixing bolt, another close to the root of the hole when the role of the porcelain crossarm bear unbalanced tension bolt hole, the stress on the cut can make the porcelain cross arm rotates along the fixed bolt, the unbalanced tension relaxation on both sides of the. The porcelain crossarm, fixed and lashing wires form has two kinds, one is direct binding, another is connected with the hardware on the porcelain head, used for hanging wire clamp.
The general line insulator China has production molding products use porcelain crossarm electrical, mechanical properties and the same voltage class is compared, its features are: 1 porcelain cross arm insulator comparative distance and the creepage distance, 50% full wave impulse flashover voltage and dry, wet flashover voltage is higher; 2 porcelain crossarm the magnet is long, mechanical bending strength is low, considering the safety factor, allowing maximum load in general than the ordinary line the same voltage insulator is small, so the porcelain cross arm is not suitable for wire section and span larger lines. Common porcelain crossarm 35KV porcelain cross arm, 10KV and 10KV porcelain porcelain cross arm pull rod three.