High Temperature Extension Tester
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Whats/App: +86 156 1874 6768
Web: standard-groups.com
The Heat Extension Tester is designed to measure the elongation and deformation of electrical wire and cable insulation and sheaths under combined heat and load conditions. It evaluates the thermal elongation performance of wire and cable insulation and jackets, ensuring compliance with industry standards and production requirements.
Standards
(1) GB/T 2951.21-2008 – Electric cables with extruded insulation, thermal elongation test method
(2) GB 12527 – Power cables insulation thermal extension requirements
(3) GB 14049-2008 – High-voltage cable insulation test methods
(4) GB/T 12706-2002 – Rated voltage cables (1 kV to 35 kV)
Parameters
| Parameter | Specification |
|---|---|
| Upper Clamps | 3 |
| Lower Clamps + Hanging Pan | 3 |
| Measuring Rods | 150 mm stainless steel, 3 pieces |
| Hanging Rod | 1 |
| Weights | 1 g × 3. 2 g × 6. 5 g × 3. 10 g × 3. 20 g × 6. 50 g × 3. 100 g × 6 |
| Test Hanger | 1 (three sets) |
Application
(1) Insulated power cables – assess thermal elongation of 1 kV to 35 kV extruded insulation cables.
(2) Overhead insulated cables – verify performance under thermal and mechanical stress.
(3) R&D laboratories – test new insulation and sheath materials for thermal stability.
(4) Quality control in cable manufacturing – ensure compliance with production standards.
(5) Electrical certification and factory inspections – required for production license renewal.
Features
(1) Measures elongation and deformation of insulation and sheath under heat and load.
(2) Multiple clamp and hanging systems for simultaneous testing of three samples.
(3) Wide range of precision weights to simulate different load conditions.
(4) Stainless steel measuring rods ensure accurate elongation readings.
(5) Suitable for cables ranging from low to high voltage (1 kV–35 kV).
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