DL/T 474.4-2006
Guide for insulation test on site AC voltage withstanding test (English Version)

Standard No.

DL/T 474.4-2006

Language

Chinese, Available in English version

Release Date

2006

Published By

Professional Standard - Electricity

Status

Be replaced 2018-07

Replace By

DL/T 474.4-2018

Latest

DL/T 474.4-2018

Replace

DL 474.4-1992

Scope

This standard proposes some technical details such as test wiring, test equipment, test methods and precautions involved in the AC withstand voltage test of high-voltage electrical equipment. This standard is applicable to AC withstand voltage tests on high-voltage electrical equipment under conditions such as power plants, substations, repair workshops, and laboratories.

DL/T 474.4-2006 Referenced Document

• DL/T 1015 Guidelines for the use of voltage measurement systems for on-site DC and AC withstand voltage tests*， 2019-10-01 Update
• DL/T 596-1996 Rules of preventive tests for electric power equipment
• GB 1094.3-2003 Power transformers Part 3: Insulation levels,dielectric tests and external clearances in air
• GB/T 16927.2-1997 High-voltage test techniques. Part 2: Measuring systems

DL/T 474.4-2006 history

• 2018 DL/T 474.4-2018 Guide for insulation test on site AC voltage withstanding test
• 2006 DL/T 474.4-2006 Guide for insulation test on site AC voltage withstanding test
• 1992 DL 474.4-1992 Guidelines for Implementation of On-Site Insulation Tests AC Withstand Voltage Test

DL/T 474.4-2006 Guide for insulation test on site AC voltage withstanding test has been changed from DL 474.4-1992 Guidelines for Implementation of On-Site Insulation Tests AC Withstand Voltage Test.