1. Scope
This Standard specifies the general technical requirements of electric power fittings (hereinafter referred to as "fittings") on designing, manufacturing and installing aspects for overhead power line, substation and distribution equipment of power station.
This Standard is applicable to fittings for overhead power line, substation and distribution equipment of power station with rated voltage of above 35kV. Fittings for serious corrosive/filthy environment, high-altitude areas and cold areas shall also meet relevant provisions of other relevant standards.
2. Normative references
The following standards contain provisions which, through reference in this text, constitute provisions of this Standard. For dated reference, subsequent amendments (excluding amending error in the Standard) to, or revisions of, any of these publications do not apply. However, the parties whose enter into agreement according to these 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 196 General Purpose Metric Screw Threads—Basic Dimensions (GB/T 196-2003, ISO 724: 1993, MOD)
GB/T 197 General Purpose Metric Screw Threads—Tolerances (GB/T 197-2003, ISO 965-1: 1998 MOD)
GB/T 1804 General Tolerances--Tolerances for Linear and Angular Dimensions without Individual Tolerance Indications (GB/T 1804-2000, eqv ISO 2768-1, 1989)
GB/T 2315 Nominal Failing Load Series and Coupling Dimensions for Electric Power Fittings
GB/T 2317.1 Mechanical Tests for Electric Power Fittings
GB/T 2317.2 Corona and RIV tests for Electric Power Fittings (GB/T 2317.2-2000, neq IEC 61284: 1997)
GB/T 2317.3 Heat Cycle Tests for Electric Power Fittings
GB/T 4056 Coupling Dimensions of Suspension Insulators for High Voltage Lines (GB/T 4056-1994, eqv IEC 60120: 1984; eqv IEC 60471: 1997)
GB/T 5075 Terminology for Electric Power Fittings
DL/T 768.7 Manufacture Quality Specification for Electric Power Fittings--Hot Dip Galvanized Coatings on Fabricated Iron and Steel Articles
DL/T l098 Requirements and Tests for Spacers
DL/T 1099 Technical Requirements and Test Method for Damper
3. Basic requirements
3.1 The fittings shall be manufactured according to design approved by the established procedure.
3.2 The fittings shall bear relevant mechanical loads possibly emergent in the installation, maintenance and operation, as well, they shall be able to meet the requirements of working conditions like the design working current (including short-circuit current), working temperature and environmental condition.
3.3 The nominal failing load and coupling dimensions of the fittings shall comply with provisions of GB/T 2315.
3.4 Coupling parts of the fittings shall be ensured not uncoupling in service, and fittings related to the line charging repair shall yet be ensured safe and are convenient for the dismounting.
