The thermal-mechanical stress test is a sample test for composite insulators and porcelain insulators required in IEC. It tests insulators with the cycling of high temperatures and low-temperature environments.
- General Details
What is the thermal-mechanical testing machine?
The thermal-mechanical testing machine is designed to test the thermal-mechanical performance of the string insulator.
How are insulators tested in this thermal-mechanical test?
Insulators are loaded into the cabinet under room temperature. During the test, insulator units shall be subjected to four 24-hour cycles of cooling and heating, and to a tensile load equal to 60% of the specified electromechanical or mechanical failing load(as per IEC 383).
How many types of thermal-mechanical testing machines do you have?
Currently, we have 2 types of structure:
What specimens are available in this test?
- Technical info
– IEC 61109:1992,MOD ; GB/T19519-2004
“Composite insulators for AC. overhead lines with a nominal voltage greater than 1000V-Definitions, test methods and acceptance criteria”
– IEC/TR 60575:1997 ; GB/T22708—2008
“Thermal-mechanical performance test and mechanical performance test on string insulator units”
QTM-100K QTM-200K QTM-500K QTM-600K QTM-1M Maximum load strength 100kN 200kN 500kN 600kN 1000kN Valid measuring range of load(KN) 2%~100% Measuring accuracy of load In the range of ±2% of the indicated value Range of testing speed Electro-hydraulic servo control 1~30N/mm2.S-1 Measuring accuracy of deformation Better than ±1% Measuring accuracy of displacement Better than ±1% Valid tensile space 0~5m According to the requirement of the customer Valid compression space 0~5m According to the requirement of the customer Width between the two upright columns 700mm 800mm 900mm 1200mm Maximum diameter of insulator Ф300mm Ф400mm Ф500mm Ф550mm Ф600mm Internal dimension of high-low temperature chamber 400X400X2500mm 650X650X3500mm 1000X800X4200mm Temperature of high-low temperature chamber －60°C~+100°C Chucking mode Thread connection Protective function Electronic limit protection function/
Automotive protective function when the load exceeds for 3% of the maximum load
Configurations of the testing software One set of CTS-600 testing software, TestWorld 5.0 Power consumption 7.5KW 11KW 15KW
Temperature controllable Yes Tensile load strength controllable Yes Easy to operate Yes Accurate in temperature control Yes Computer live display Yes Multi-functional for auto-recording, saving and printing curve and reports Yes
- Related Products
Cantilever & torsion tester is called “Bending and torsion testing machine”. It’s used for mechanical bending and torsion test of post insulators. The test methods and acceptance criteria shall be subject to IEC standard 61109 and 60383. The cantilever test ( bending test ) are commonly seen in manufacturer of composite insulators, the insulators under this test are for the purpose of overhead power transmission lines, while the torsion test is for power station post type insulators.
The insulator porosity test machine is to inspect the porosity property of the HV porcelain insulator under a constant high-pressure environment with dye penetration.