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      How to chose the polymer insulator core rod?
      Time:2022-08-04 16:02:57View count:

      How to chose the polymer insulator core rod?

      Polymer insulators ,Which include polymer suspension insulators, polymer tension insulator, polymer stay insulators ,polymer post insulators , polymer line post insulators,polymer railway insulators,loop insulators, tramway insulators,ESP insulators and so on ,more info can be get from website www.tidpower.com ,are used more and more recently year in transmission and distribution power line,caused by the advantage of the polymer insulator ,light weight, anti-pullution and safety ,

      The insulator content 3 parts ,fiberglass core rod,silicone rubber and the metal fittings.The function of the fiberglass is inner insulation and afford the mechanical load, the metal fittings are used for connecting the insulation parts with live line and the tower. Silicone rubber is the parts for protecting the fiberglass rod against the UV and increase the creapage of the insulator.

      Based on above , We can got that the quality of the insulator relayed on the quality of the fiberglass rod.So that how to chose a fiberglass rod is very important for manufacture the polymer insulator.

      Generally,There are two type of insulator core rod, one is E glass epoxy fiberglass rod,the other is ECR glass epoxy fiberglass rod, Normally ,we suggest to use ECR rod for 132KV insulator and above ,especially for suspension and tension insulator, 132KV and below insulator ,we can chose E glass fiberglass or ECR glass rod, We have reports in China that the 110KV insulator failed on line and we found that always broken on the 150mm parts away from the live line part and checked the insulator ID record and we found the common info that the insulator made by E glass rod,In China,we did a lot of research and finally we got that the arcing always occurred at the place 150mm away from the live line parts.The arcing burned the silicone rubber and the fiberglass rod bored out . And the arcing electrolyze the water from the fog ,dew and rain into the soft acid.The acid corrode the fiberglass continually and finally if the manufacture use the Eglass rod for the composite insulator, then it will break very soon and fall down from the line. However if the manufacture chose the ECR fiberglass rod ,This kinds of story will not happen.

      There are so many fiberglass rod manufacture ,How can we find out the right one ? If anyone want to catch the point only by the fiberglass rod out look and the price,who will take a big risk.There is almost no any big different only by inspect the appearance.We should do the test according to IEC 61109 or relative ASTM or GB/T standard by ourselves and trial on the manufacture process to make sure. There below is the technical character of the fiberglass for our reference:

      How to chose the polymer insulator core rod?(圖1)

      Insulator Core Rod E glass and ECR-glass )



      No.

      Technical specification

      Unit

      Specification value

      1

      Density(at 20±2℃)

      g/cm3

      2.2

      2

      Water absorption rate (at 20±2℃,24h)

      %

      0.05

      3

      Tensile strength

      Mpa

      1100

      4

      Bending strength

      Mpa

      960

      5

      Dye penetrated test

      Min

      15

      6

      Water diffusion test (1%NaCl,Boiling for 100h 12kv/1min)

      mA

      0.1

      7

      Shearing strength along laminas

      Mpa

      50

      8

      Volume resistivity (140,96h)

      Ω.M

      1010

      9

      DC withstand voltage (10mm)

      kV

      50

      10

      Lighting surge withstand voltage (100kv,10mm)

      Times

      5

      11

      Bending strength at heating conditions

      Mpa/150

      350

      12

      Stress corrosion (1mol/1HNO3,at 67%stress)

      h

      96 (ECR rod only)

      13

      Torsion strength

      Mpa

      800



      Insulator core rod made of ECR fiberglass reinforced the epoxy resin.Insulator core rods also are also called fiberglass rod,FRP rod,GRP rod,fiberglass bar,Insulation rod,fiberglass stick ,ECR rod and so on.

      1. 1. Standard: IEC61109

      2. 2. Material: E glass and epoxy resin.

      3. 3. Process: Continuous pultrusion.

      4. 4. Main Specification

      5. Size



      How to chose the polymer insulator core rod?(圖2)

      The second thing we will meet when we select the fiberglass core rod,How can we know the which diameter of the rod is suitable for our polymer insulators, especially for chose the insulator core rod for a post insulator which need a high bending strength. There are two way to got it ,one is calculate based on above technical character which is different between different manufacture ,the other is testing to verify the design. We also can ask the experience and the suggestion by the experience engineer by contact www.tidpower.com .Finally we also need to consider the size which the manufacture normally have to avoid make a new mold which cost money and time.Here below is the size of TID TECH fiberglass rod for our reference. Engineer can chose a right size based above calculate and testing.



      Note:

      1.Color: light green or brown.

      2.Length: according to Customer requirement.

      3. We offer customized products,including the new size, New surface treatment, Jointing the fitting, screw or mechanical.


      Products Code

      D(mm)

      L (mm)

      Weight (kg)

      Products Code

      D(mm)

      L (mm)

      Weight (kg)

      TECR00500

      Φ5

      1000

      0.05

      TECR03800

      φ38

      1000

      2.44

      TECR00800

      Φ8

      1000

      0.11

      TECR04000

      φ40

      1000

      2.70

      TECR01000

      Φ10

      1000

      0.17

      TECR04100

      φ41

      1000

      2.77

      TECR01200

      Φ12

      1000

      0.25

      TECR04200

      Φ42

      1000

      3.05

      TECR01600

      φ16

      1000

      0.43

      TECR04500

      φ45

      1000

      3.42

      TECR01670

      Φ16.7

      1000

      0.49

      TECR05000

      φ50

      1000

      4.22

      TECR01748

      Φ17.48

      1000

      0.53

      TECR05300

      φ53

      1000

      4.74

      TECR01800

      φ18

      1000

      0.55

      TECR05500

      φ55

      1000

      5.11

      TECR02000

      φ20

      1000

      0.68

      TECR06000

      φ60

      1000

      6.10

      TECR02200

      φ22

      1000

      0.82

      TECR06350

      Φ63.5

      1000

      6.97

      TECR02400

      φ24

      1000

      0.98

      TECR06800

      φ68

      1000

      7.80

      TECR02500

      φ25

      1000

      1.05

      TECR07000

      φ70

      1000

      8.27

      TECR02600

      φ26

      1000

      1.14

      TECR07620

      Φ76.2

      1000

      10.03

      TECR02800

      φ28

      1000

      1.29

      TECR08000

      φ80

      1000

      10.80

      TECR03000

      φ30

      1000

      1.52

      TECR09000

      φ90

      1000

      13.67

      TECR03200

      φ32

      1000

      1.73

      TECR11000

      φ110

      1000

      20.42

      TECR03400

      φ34

      1000

      1.95

      TECR12000

      Φ120

      1000

      24.87

      TECR03600

      φ36

      1000

      2.19

      TECR13000

      Φ130

      1000

      29.19



















































      Polymer insulator manufacture is a very complex process ,the quality base on all aspect ,TID Tech who have more than 15 years polymer insulator manufacture ,always open mind and very glad to share the experience with any transmission and distribution line manufacture engineers to improve the quality of the polymer insulators,If anyone want to discuss with our experienced engineer ,you can get the contact info from www.tidpower.com.



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