DL/T 596-1996 in English

1 Scope

This standard specifies the items, periods and requirements of preventive tests for various electric power equipment, in order to judge whether the equipment meets the operating conditions, to prevent equipment damage and ensure safety operation.
This standard is applicable to 500kV or below AC electric power equipment.
This standard is not applicable to high-voltage DC transmission equipment, electric power equipment for mine and used under other special conditions, as well as electrical equipment and safety appliances such as protective relay device, automatic device and measuring device of electric power systems.
The equipment imported from abroad shall be implemented by reference to this standard based on the product standard of this equipment.

2 Normative References

The following documents contain provisions which, through reference in this text, constitute provisions of this standard. At the time of publication, the editions indicated are valid. All standards are subject to revision, and parties using the standard shall investigate the possibility of applying the latest edition of the standards indicated below.

Contents
Foreword I
1 Scope
2 Normative References
3 Definitions and Symbols
4 General Provisions
5 Rotating Machines
6 Power Transformers and Reactors
7 Instrument Transformers
8 Switchgears
9 Bushings
10 Post Insulators and Suspension Insulators
11 Power Cable Lines
12 Capacitors
13 Insulating Oil and SF6 Gas
14 Arresters
15 Busbars
16 Secondary Circuits
17 Electrical Switchgear and Power Wiring up to 1kv
18 Overhead Power Lines above 1kV
19 Earthing Devices
20 Electric Precipitators
Appendix A AC Test Voltage, Ageing Identification and Silicon Steel Sheet Specific Loss of Stator Winding of Synchronous Generators and Condensers
Appendix B Voltage Standard of Insulator in AC Withstand Voltage test
Appendix C Contamination Grade and Corresponding Salt Density Value
Appendix D Methods for Determining Damage and Water Inflow of Inner Liner and Outer Sheath of Rubber and Plastic Cables
Appendix E Earthing Method of Metal Layer in Rubber and Plastic Cable Accessories
Appendix F Conductance Current Value and Power Frequency Discharge Voltage of Arresters
Appendix G Reference Data