Standard Test Method for Dielectric Breakdown Voltage and Dielectric Strength of Solid Electrical Insulating Materials at Commercial Power Frequencies| voltage withstand, surrounding medium, step-by-step, slow rate-of-rise, sampling, research testing, rapid rise, quality-control testing, proof testing, process-control testing, power frequency, flashover, electrodes, dielectric strength, dielectric failure, dielectric breakdown voltage, criteria of breakdown, calibration, breakdown voltage, breakdown