Astm D61821: Pdf

48 hours at 50 ± 3 °C followed by direct water immersion at 23 °C.

Plastics are viscoelastic materials. Their mechanical strength, impact resistance, and electrical insulation properties change depending on the amount of moisture they have absorbed and the temperature of their surroundings. astm d61821 pdf

The testing apparatus used is the , which must conform to ISO 32100 standards. The machine works by holding a leather sample and repeatedly flexing it at a controlled rate, typically 100 cycles per minute. 3. Test Specimens and Preparation 48 hours at 50 ± 3 °C followed

: For monitoring the condition of oils in transformers, circuit breakers, and other electrical equipment. and other electrical equipment.