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The test sample is mounted on the tester in an approximately normal condition and the test piece shall be subjected to pure torsional moments without bending moments during the test.
If the sample consists of multiple components, it can be performed on a single component. If it consists of multiple types of components, the lowest strength component can be used for testing.
2, casing insulator test procedure
During the test, the load shall be increased smoothly and without impact until 75% of the specified bending failure load, and then increased to the destruction of the sample at a rate of 35%-100% of the specified bending failure load per minute. The apparent damage is caused or the load indicator value of the test machine no longer rises. The load value at this time is the bending failure load of the test sample.
For post insulators, the load should be increased smoothly and without impact until 50% of the specified bending failure load, and then increased to the destruction of the specimen at a rate of 35%-100% of the specified bending failure load per minute. Observe that the phenomenon of obvious damage, or test machine load indicator no longer rise), at this time the load value of the test specimen bending failure load.
If only the load test is required, the load is increased to the test load specified in the standard. If the test product does not break under this load, the test is passed.
Article from: Jinan Zhongchuang Industrial Testing System Co., Ltd. Technical Department
How did you teach Torsional Insulators to perform Torsional Destruction Test?
1, casing insulator installation