Insulator Testing Machine of Thermal-Mechanical Stress

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.

  1. 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:
    Vertical type
    Horizontal type


    What specimens are available in this test?

    Specimen available:
    Ceramic insulator
    Glass insulator

  2. Technical info

    Standard applied:


    – 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”

    Model Specification

    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




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