ASTM A717 / A717M Standard Test Method for Surface Insulation Resistivity of Single-Strip Specimens
ASTM A717 / A717M單片樣品表面絕緣電阻率標準試驗方法
This test method is particularly suitable for quality control in the application of insulating coatings.
Surface insulation resistivity is evaluated from a dc current that can range from 0 (perfect insulator) to 1 A (perfect conductor).
Single readings should not be considered significant since the nature of the test device and specimen are such that successive measurements of a specimen often yield different values.
1. Scope
1.1 This test method covers a means of testing the surface insulation resistivity of single strips or punchings of flat-rolled electrical steel under predetermined conditions of voltage, pressure, and temperature.
1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.
This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
2. Referenced Documents (purchase separately)
ASTM Standards
A34/A34M Practice for Sampling and Procurement Testing of Magnetic Materials
Index Terms
coatings; electrical steel; Franklin tester; insulation; resistivity; single-strip specimens; surface insulation resistivity;
