Water Immersion Pre-Stressing Test Machine of Composite Insulator

Insulator polymer tightness tester is used to check tightness of polymer housing of composite insulator, whether the polymeric housing is well attached to FRP will be shown after 96 hours of boiling in salty water. This boiling process is also essential as preparation stage of some electrical test of composite insulator.

General Details

What is a water immersion pre-stressing testing machine?

The Water immersion pre-stressing testing machine for polymer tightness test is also called a water boiling machine in China.It is mainly applied in the insulator test of salty water boiling according to the IEC requirement to composite insulators. The composite insulator is to be put into the testing chamber and the machine heats the salty water in it till it’s boiling. After 42 hours (or more) of boiling, pick out the composite insulator when the water cools down and check the cohesion of fiberglass rod and polymeric housing. No detachment or gap shall be found between two surfaces of the material. After such a boiling process, a composite insulator shall be taken for the next stage test: electrical power frequency flashover test and steep-front test. So this polymer tightness testing machine is also used in the pre-test stage of the electrical test of composite insulator.

This testing machine can provide a convenient testing process for inspectors, with automatic temperature stabilizing function and time control, it has a digital display for operating to witness the entire process of test, which makes it very easy to operate.

Technical Info

Reference Standard: IEC 61109:1992,MOD / GB/T19519-2004 Composite insulators for A.C. overhead lines with a nominal voltage greater than 1000V–Definitions, test methods and acceptance criteria

Model. QHBT-100
Nominal cabinet capacity 1.2CBM
Nominal cabinet dimension(mm) 6000*450*450
Temperature range ≤+100℃
Temperature fluctuation ±1.0℃
Temperature deviation ±2.0℃
Digital Display Yes
Temperature holding function Yes
Automatic test control Yes




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