1. General
1.1 Scope
The standard is suitable for using for the following AC disconnectors and earthing switches, like fixed indoors and outdoors, terminal is seal and open, the rated voltage is more than 3.6kV, and the operating frequency is less than 50HZ.
The standard is also suitable for the operation mechanism and its auxiliary equipment of these disconnectors and earthing switches.
The additional requirement of disconnectors and earthing switches in enclosed switch equipment and control equipment are given in GB 3906, GB 7674 and IEC 60466.
Note: the standard is exclusive of the situation that the fuse is not taken as a component of the disconnectors.
1.2 Normative References
The following standards contain provisions which, through reference in this text, constitute provisions of the Specifications. For dated reference, subsequent amendments (excluding amending error in the text) to, or revisions of, any of these publications do not apply. However, the parties whose enter into agreement according to the Specifications are encouraged to research whether the latest editions of these references are applied or not. For undated references, the latest edition of the normative document is applicable to this standard.
GB/T 311.2-2002 Insulation co-ordination-Part 2: Application guide for insulation co-ordination for high voltage transmission and distribution equipment (eqv IEC 60071-2:1996)
GB/T 1804-2000 General tolerances－Tolerances for linear and angular dimensions without individual tolerance indications (eqv ISO 2768-1:1989)
GB/T 2900.20-1994 Electrotechnical terminology-High-voltage switchgear (neq IEC 60050)
GB 3804-2004 3.6kV-40.5 kV High-voltage AC Load Switch (IEC 60265-1:1998, MOD)
GB 3906-1991 3-35 kV AC Metal Seal Switchgear (neq IEC 60298:1990)
GB/ T 4109-1999 Technical specification of high voltage bushings (eqv IEC 60137:1995)
GB 4208-1993 Degrees of protection provided by enclosures (IP Code) (eqv IEC 60529:1989)
GB/T 5582-1993 External insulation pollution classes of high-voltage electric power equipments (neq IEC 60815:1986)
GB/T 7354-2003 Partial Discharge Measurement (IEC 60270:2000, IDT)
GB 7674-1997 Gas-insulated metal-enclosed switchgear for rated voltages of 72.5 kV and above (eqv IEC 60517:1990)
GB/T 11022-1999 Common specifications for high-voltage switchgear and controlgear standards (eqv IEC 60694:1996)
GB/T 14810-1993 AC high-voltage switches for rated voltages of 110kV and above (neq IEC 60265-2:1988)
IEC 60466:1987 AC insulation-enclosed switchgear and controlgear for rated voltage 1kV above to 38kV
IEC 60865-1:1993 Short-circuit currents - Calculation of effects- Part 1 Definition and calculation method
2 Normal and particular service requirement
It is suitable for applying to Chapter 2.
3. Terms and definitions
It is suitable for applying to Chapter 3. The following supplement will be added to as follows as follows:
The required definition is contained in the chapter. Most of them refer to GB/T 2900.20.
