DL/T 403-2000 in English

1 Scope

This standard specifies the service conditions, parameters, structures, technical requirements and test items of HV vacuum circuit-breakers.
This standard is applicable to three-phase and single-phase HV vacuum circuit-breakers (hereinafter referred to as vacuum circuit-breakers) with rated voltage 12kV~40.5kV and frequency 50Hz and their fitted vacuum interrupters (hereinafter referred to as interrupters, also called switching tubes).This product is mainly used for the protection and control in the power plant, AC distribution system and transformer substation as well as such locations as transformer substations of industrial and mining enterprises.
Note: The generator circuit-breaker shall not be included.

2 Normative References

The following normative documents contain provisions which, through reference in this standard, constitute provisions of this standard. At time of publication, the editions indicated were valid. All the standards will be revised, all parties coming to an agreement according to this standard are encouraged to study whether the latest editions of the following standards are applicable.

Foreword I
1 Scope
2 Normative References
3 Normal and Particular Service Requirements
4 Rated Parameters
5 Structural and Technical Requirements
6 Type Tests
7 Delivery Tests
8 Marking, Packaging, Transport and Storage