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This standard is developed in accordance with the rules given in GB/T 1.1-2009 Directives for standardization - Part 1: Structure and drafting of standards.
This standard was proposed by the National Energy Administration.
This standard is under the jurisdiction of Subcommittee on Wind Power Electrical Equipment of the National Technical Committee on Wind Power in Energy Industry of Standardization Administration of China (NEA/TC 1/SC 5).
This standard is issued for the first time.
In the process of implementing this standard, the relevant comments and recommendations, whenever necessary, may be fed back to the Standardization Center of China Electricity Council (No.1, 2nd Lane, Baiguang Road, Beijing, 100761, China).
Wind turbines - Pitch slip ring
1 Scope
This standard specifies the technical requirements, test methods, inspection rules as well as marking, packaging, transportation and storage of pitch slips ring of wind turbines.
This standard is applicable to electric contact friction-type pitch slip ring of wind turbines, and may serve as a reference for other friction-type slip rings.
2 Normative references
The following referenced documents are indispensable for the application of this standard. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 4208 Degrees of protection provided by enclosure (IP code)
GB/T 2423.1 Environmental testing for electric and electronic products - Part 2: Test methods - Tests A: Cold
GB/T 2423.2 Environmental testing for electric and electronic products - Part 2: Test methods - Tests B: Dry heat
GB/T 2423.3 Environmental testing - Part 2: Testing method - Test Cab: Damp heat, steady state
GB/T 2423.10 Environmental testing for electric and electronic products - Part 2: Tests methods - Test Fc: Vibration (sinusoidal)
GB/T 2423.18 Environmental testing - Part 2: Test methods - Test Kb: Salt mist, cyclic (sodium chloride solution)
GB/T 2423.21 Environmental testing - Part 2: Test methods - Test M: Low air pressure
GB/T 2828.1 Sampling procedures for inspection by attributes - Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection
GB/T 13306 Plates
GB/T 13384 General specifications for packing of mechanical and electrical product
3 Technical requirements
3.1 Dedicated technical requirements
Slip rings shall comply with the requirements of this standard and the order contract (or technical agreement). The minimum technical requirements shall include:
a) environmental requirements;
b) mechanical interface requirements;
c) electrical interface requirements;
d) slide definition and voltage, current and signal transmission requirements;
e) requirements of supporting encoder or sensor and its wiring definition (optional);
f) heater requirements (optional);
g) acceptance procedures and requirements;
h) quality and other requirements.
3.2 General technical requirements
3.2.1 Electrical performance requirements
3.2.1.1 Contact resistance
When the slip ring works, it is required that the contact between the slip ring slide and the brush is reliable, without disconnection, dislocation and other poor contact phenomena. See Table 1 for contact resistance (except cable).
Table 1 Contact resistance
S.N. Slide name Static contact resistance fluctuation
mΩ Dynamic contact resistance R
mΩ
1 All rings ≤30 ≤30
3.2.1.2 Insulation
See Table 2 for the insulation resistance of slip rings to enclosure (ground) and between rings.
Table 2 Insulation resistance
S.N. Slide name Insulation resistance
MΩ Voltage grade
V
1 Power ring ≥300 DC1000
2 Signal ring ≥100 DC500
3.2.1.3 Insulating dielectric strength
The power-frequency withstand voltage of slip rings to enclosure (ground) and between rings shall be as specified in Table 3, and the leakage current shall not be greater than 10mA.
Table 3 Power-frequency withstand voltage
Rated insulation voltage Ui
V Power-frequency withstand voltage (AC r.m.s. value)
V Withstand time
s Leakage current
mA
Ui≤12 250 30 ≤10
12
Foreword i
1 Scope
2 Normative references
3 Technical requirements
3.1 Dedicated technical requirements
3.2 General technical requirements
4 Test methods
4.1 Test equipment
4.2 Measuring instruments
4.3 Electrical performance test
4.4 Type test
4.5 Service life test
4.6 Appearance inspection
5 Inspection rules
5.1 Inspection classification
5.2 Inspection conditions
5.3 Sampling
5.4 End-of-manufacturing inspection
5.5 Type test
6 Marking, packaging, transportation and storage
6.1 Marking
6.2 Packaging
6.3 Transportation and storage
