Cantilever & Torsion testing machine for Electrical post insulator and bushing

Type of machine:

- Testing machine

Testing subject:

- Mechanical cantilever and torion strength of high voltage electrical post/pin insulator and bushing

Insulator appicable:

- Ceramic post insulator

- Ceramic pin insulator

- Ceramic pin bushing

- Polymeric post insulator

- Polymeric pin insulator

- Polymeric bushing

Type of test:

- Mechanical sample test

Standard applied:

- IEC60168:2001,MOD

(Indoor and outdoor post insulators for systems with nominal voltage greater than 1 000V—Part 1 :Test on insulators of ceramic material or glass)

Advantages:

- Multi-function, combines cantilever test and torsion test within one machine

- Compatibility, available for all post insulator and bushing with big length and high mechanical strength

- Accuracy, controlled by computer, powered and driven automatically.

- Conveniency, curve of strength shown live on screen, easy to observe,save and print

Detail description:

The bending torsion testing machine is mainly applicable in the mechanical bending (cantilever) and torsion test for post type insulators and pin type insulators with material of porcelain or polymer.

As it is required in IEC standard and ANSI standard, porcelain post insulators for subsation and overhead transmission line should bear a certain mechanical load. This mechanical load include bending load and torsion load. (Sometimes it’s also called cantilever load of post insulators) So it is the same with polymeric post insulators. Polymer post insulators with epxoy resin core has appeard for decades, though the specifc standard of which has not been defined, it is also required to be tested as ceramic post insulators. This bending & torsion testing machine will meet this demand.

As you can see in the figure, post insulator specimen shall be fixed on the bottom base with flange. In the vertical direction it is adjustable to adapt different insulator with different height. A moveable device will push from horizontal direction and record the process. This machine provides a maximum bending load of 50kN and maximum torque load of 8 to 30 kN with different model, which can cover all types of common insulators and fittings.

This machine is controlled by computer, engineers could see the changes of strength via curve and value shown live on screen, can be stopped at any point, result can be saved , recalled and printed.