The Hot Deformation Test determines the resistance of thermoplastic insulation and sheath materials of electric cables to mechanical pressure at high temperatures. This test ensures that the insulation does not deform excessively under prolonged heat exposure, which could compromise electrical safety and performance.

Key Features & Functional Specifications:

1. Test Chamber:
   • High-precision heating system with uniform temperature distribution
   • Temperature Range: Up to 200°C (or as per test requirements)
   • PID Digital Temperature Controller for accurate heat regulation
   • Forced air circulation for uniform heating
2. Test Mechanism:
   • Weight Application System: Precisely calibrated weights for applying mechanical pressure
   • Adjustable Load Mechanism: Allows for testing different sheath and insulation thicknesses
   • Standardized Pressure Plates: Ensures uniform contact pressure on the test sample
3. Sample Holder & Measurement System:
   • Micro meter or Dial Gauge for measuring deformation
   • Pre-calibrated reference scale to determine the reduction in thickness
   • Test sample dimensions: As per IS:10810-15

Testing Procedure:

1. Precondition the sample at the specified temperature for a set duration.
2. Apply the specified mechanical pressure on the sample.
3. Maintain the pressure at elevated temperature for the required time.
4. Measure and record the deformation (change in thickness).
5. Compare results with acceptable deformation limits as per standards.

Significance of the Test:

• Ensures the long-term reliability of thermoplastic cable insulation and sheaths.
• Prevents insulation failure due to excessive deformation under heat and pressure.
• Ensures compliance with national and international safety standards.