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What are strain insulator and suspension insulator?

        Strain insulator (tension insulator) is an important component in the process of transmission line erection, which mainly includes porcelain strain insulator, glass strain insulator and composite strain insulator .Suspension insulator is widely used in the insulation and mechanical fixation of high voltage overhead transmission lines. And suspension insulator can be divided into disc suspension insulator and rod            suspension insulator. Disc suspension insulator is the most widely used insulator in transmission line. Rod suspension insulator has been widely used in Germany and other countries.
          Strain insulator (tension insulator) is an important component in the process of transmission line erection, which mainly includes porcelain strain insulator, glass strain insulator and composite strain insulator . It can effectively isolate the live wire from the ground and keep the position of each wire unchanged.Due to the influence of environmental factors, insulator will inevitably be damaged when the transmission line is operating.Strain insulator (tension insulator) is the most common product in transmission line. It is always used together with supporting power fittings. According to the construction needs, several strain insulators can put together to meet the tension requirements.     
         Suspension insulator is widely used in the insulation and mechanical fixation of high voltage overhead transmission lines. And suspension insulator can be divided into disc suspension insulator and rod suspension insulator. Disc suspension insulator is the most widely used insulator in transmission line. Rod suspension insulator has been widely used in Germany and other countries. If you are interested in porcelain insulator,suspension insulator,disc insulator,strain insulator,contact changsha rich company for more information, www.hncmec.com, export@hncmec.com
          Compared with suspension insulator, strain insulator  needs to bear the tension of overhead line, which is mostly used at the end of line and the electric tower where the line needs to change direction. Suspension insulator does not need to bear the tension of the line, but only the gravity of the line itself. So suspension insulator is mostly used on the electric tower where the wire is straight.When the voltage is higher than 33kV, the performance of pin insulator will decrease due to the increasing size and weight. At the same time, the handling and replacement of single insulator with larger size also bring great challenges to the actual operation. In order to solve these problems, suspension insulator came into being.    

Advantages of suspension insulator:           
 
  •  On the basis of that the rated voltage of each porcelain disc is 11kv (the higher rated voltage is 15kV), suspension insulators string can be applied to any voltage level by using different number of discs insulator.      
  •  When any disc insulator in the suspension insulator string is damaged, the maintenance workers can quickly replace the damaged insulator.            
  •  Because the wire is suspended on the flexible suspension insulator string, the mechanical stress on each insulator is smaller.            
  • Since the wire is carried by the bottom insulator, the height of the conductor position is always less than the total height of the supporting structure. Therefore, the conductor is safer.    

Disadvantages of suspension insulator:            
 
  • The price of suspension insulator string is higher than that of pin insulator.            
  • Compared with pin insulator or post insulator, suspension insulator string needs higher support space to ensure the current conductor is far away from the ground.            
  • In suspension insulator system, the free swing amplitude of wire is large, so there should be a large space between wires.

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