Standard Test Method for Thermal Endurance of Coating Powders Used for Integral Bus Bar Insulation Systems

Importancia y uso:

5.1 A major factor affecting the life of insulating materials is thermal degradation. It is possible that other factors, such as moisture and vibration, will cause failures after the material has been weakened by thermal degradation.

5.2 Electrical insulation is effective in electrical equipment only as long as it retains its physical and electrical integrity. The following are potential indicators of thermal degradation: weight change, porosity, crazing, and generally a reduction in flexibility. Thermal degradation is usually accompanied by an ultimate reduction in dielectric breakdown.

5.3 This test method is useful in determining the thermal endurance of coating powders applied over a copper or aluminum substrate material.

Subcomité:

D09.01

Volúmen:

10.02

Número ICS:

29.060.10 (Wires), 29.080.01 (Insulation in general), 87.040 (Paints and varnishes)

Palabras clave:

dielectric breakdown voltage; integral bus bar; powder coating; temperature index; thermal endurance; thermal endurance graph; thermal life; thermal life curve;