GB/T 29631-2025 Flexible and torsion resistant cables of rated voltages up to and including 1.8/3kV for wind turbine
1 Scope
This document specifies the product code, marking, technical requirements, inspection rules, test methods and packaging, etc. of flexible and torsion resistant cables of rated voltages up to and including 1.8/3kV for wind turbine used at the connection between turbine and tower in wind power generation equipment or similar occasions.
This document is applicable to flexible and torsion resistant cables for wind power generation systems or similar systems with rated voltage U0/U of 1.8/3kV and below.
2 Normative references
The following documents contain provisions which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 2423.17 Environmental testing for electric and electronic products - Part 2: Test method - Test Ka: Salt mist
GB/T 2423.18 Environmental testing - Part 2: Test methods - Test Kb: Salt mist, cyclic (sodium chloride solution)
GB/T 2900.10 Electrotechnical vocabulary - Electric cables
GB/T 3048.4 Test methods for electrical properties of electric cables and wires - Part 4: Test of DC resistance of conductors
GB/T 3048.5 Test methods for electrical properties of electric cables and wires - Part 5: Test of insulation resistance
GB/T 3048.8 Test methods for electrical properties of electric cables and wires - Part 8: AC voltage test
GB/T 3048.9 Test methods for electrical properties of electric cables and wires - Part 9: Spark test of insulated cores
GB/T 3048.13 Test methods for electrical properties of electric cables and wires - Part 13: Impulse voltage test
GB/T 3956 Conductors of insulated cables
GB/T 4909.2 Test methods for bare wires - Part 2: Measurement of dimensions
GB/T 6995.1 Markings for electric wires and cables - Part 1: General requirements
GB/T 16927.1 High-voltage test techniques - Part 1: General definitions and test requirements
GB/T 18380.12 Tests on electric and optical fibre cables under fire conditions - Part 12: Test for vertical flame propagation for a single insulated wire or cable - Procedure for 1kW pre-mixed flame
GB/T 18380.35 Tests on electric and optical fibre cables under fire conditions - Part 35: Test for vertical flame spread of vertically-mounted bunched wires or cables - Category C
JB/T 8137 (all parts) Delivery drums for wires and cables
JB/T 10696.7 Test methods for determining mechanical, physical and chemical properties of electric cables and wires - Part 7: Tear test
IEC 60,719 Calculation of the lower and upper limits for the average outer dimensions of cables with circular copper conductors and of rated voltages up to and including 450/750V
IEC 60811-201 Electric and optical fibre cables – Test methods for non-metallic materials - Part 201: General tests - Measurement of insulation thickness
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 2900.10 and the following apply.
3.1
rated voltage
reference voltage for cable design, service and electrical performance test
3.2
batch
products of the same model and specification ordered at one time
Note: If there are products of different models and specifications in one order, different models and specifications will be regarded as different batches.
3.3
routine test
R
tests made by the manufacturer on each manufactured length of cable to check that each length meets the specified requirements
3.4
sample tests
S
tests made by the manufacturer on samples of completed cable or components taken from a completed cable, at a specified frequency, so as to verify that the finished product meets the specified requirements
3.5
type tests
T
tests made before supplying, on a general commercial basis, a type of cable covered by this document, in order to demonstrate satisfactory performance characteristics to meet the intended application
Note: These tests are of such a nature that, after they have been made, they need not be repeated, unless changes are made in the cable materials, design or manufacturing process which might change the cable characteristics.
4 Service characteristics
4.1 Rated voltage
The rated voltages U0/U of the cables in this document are marked as: 450/750 V, 0.6/1kV, 1.8/3kV.
U0 represents the voltage r.m.s. between any main insulated conductor and the "ground" (metallic shield, metallic sheath or surrounding medium); U represents the voltage r.m.s. between any two-phase conductors of multicore cable or single-core cable.
Contents Foreword iii 1 Scope 2 Normative references 3 Terms and definitions 4 Service characteristics 5 Codes, models, specifications and product representation methods 6 Technical requirements 7 Finished cable test 8 Inspection rules 9 Delivery length 10 Packaging, transportation and storage of cables Annex A (Normative) Performance requirements for cable insulation and sheathing materials Annex B (Normative) Fictitious calculation method for determination of dimensions of protective coverings Annex C (Normative) Torsion test Annex D (Normative) Load-bearing test Annex E (Normative) Low temperature bending test Annex F (Normative) Artificial climate aging test Annex G (Normative) Salt spray test
