GB/T 28427-2012 in English

《GB/T 28427-2012电气化铁路27.5kV单相交流交联聚乙烯绝缘电缆及附件》由347（国家铁路局）归口，TC278SC3（全国轨道交通电气设备与系统标准化技术委员会牵引供电分会）执行，主管部门为国家铁路局。

1 Scope

This standard specifies the terms and definitions, voltage designations and materials, service characteristics and conditions, codes and representation methods, technical requirements, test conditions, inspection rules, test methods, acceptance rules, marking, packaging, transportation and storage of 27.5kV single-phase AC XLPE insulation cable and accessories for electrification railway.

This standard is applicable to single-phase AC XLPE insulation cable with rated voltage U0 of 27.5kV for electrification railway and its inside cone plug-in type separable connectors, indoor and outdoor terminations, joints, etc.

2 Normative references

The following referenced documents are indispensable for the application 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 2951.11-2008 Common test methods for insulating and sheathing materials of electric and optical cables - Part 11: Methods for general application - Measurement of thickness and overall dimensions - Tests for determining the mechanical properties (IEC 60811-1-1:2001, IDT)
GB/T 2951.12-2008 Common test methods for insulating and sheathing materials of electric and optical cables - Part 12: Methods for general application - Thermal ageing methods (IEC 60811-1-2:1985, IDT)
GB/T 2951.13-2008 Common test methods for insulating and sheathing materials of electric and optical cables - Part 13: Methods for general application - Measurement for determining the density - Water absorption tests - Shrinkage test (IEC 60811-1-3:2001, IDT)
GB/T 2951.14-2008 Common test methods for insulating and sheathing materials of electric and optical cables - Part 14: Methods for general application - Test at low temperature (IEC 60811-1-4:1985, IDT)
GB/T 2951.21-2008 Common test methods for insulating and sheathing materials of electric and optical cables - Part 21: Methods specific to elastomeric compounds - Ozone resistance, hot set and mineral oil immersion tests (IEC 60811-2-1:2001, IDT)

GB/T 2951.31-2008 Common test methods for insulating and sheathing materials of electric and optical cables - Part 31: Methods specific to PVC compounds - Pressure test at high temperature - Test for resistance to cracking (IEC 60811-3-1:1985, IDT)
GB/T 2951.32-2008 Common test methods for insulating and sheathing materials of electric cables - Part 32: Methods specific to PVC compounds - Loss of mass test - Thermal stability test (IEC 60811-3-2:1985, IDT)
GB/T 2951.41-2008 Common test methods for insulating and sheathing materials of electric and optical cables - Part 41: Methods specific to polyethylene and polypropylene compounds - Resistance to environmental stress cracking - Measurement of the melt flow index - Carbon black and/or mineral filler content measurement in polyethylene by direct combustion - Measurement of carbon black content by thermo gravimetric analysis (TGA) - Assessment of carbon black dispersion in polyethylene using a microscope (IEC 60811-4-1:2004, IDT)
GB/T 2952.3-2008 Protective coverings for electric cables - Part 3: General protective coverings for cables with non-metallic sheath
GB/T 3048.4-2007 Test methods for electrical properties of electric cables and wires - Part 4: Test of DC resistance of conductors
GB/T 3048.8-2007 Test methods for electrical properties of electric cables and wires - Part 8: AC voltage test (IEC 60060-1:1989, NEQ)
GB/T 3048.11-2007 Test methods for electrical properties of electric cables and wires - Part 11: Test for dielectric dissipation factor
GB/T 3048.12-2007 Test methods for electrical properties of electric cables and wires - Part 12: Partial discharge test (IEC 60885-3:1988, MOD)
GB/T 3048.13-2007 Test methods for electrical properties of electric cables and wires - Part 13: Impulse voltage test (IEC 60230:1966, IEC 60060-1:1989, MOD)
GB/T 3512-2001 Rubber, vulcanized or thermoplastic - Accelerated ageing and heat resistance tests - Air-oven method (eqv ISO 188:1998)
GB/T 3956-2008 Conductors of insulated cables (IEC 60228:2004, IDT)
GB/T 6553-2003 Test methods for evaluating resistance to tracking and erosion of electrical insulating materials used under severe ambient conditions (IEC 60587:1984, IDT)
GB 6995.3-2008 Markings for electric cables and wires - Part 3: Identifications of cables and wires
GB/T 9327-2008 Compression and mechanical connectors for power cables for rated voltages up to 35kV (Um=40.5kV) - Test methods and requirements (IEC 61238-1:2003, MOD)
GB/T 14315-2008 Compression type terminal lugs and ferrules with copper or aluminum for power cables conductors

GB/T 16585-1996 Rubber, vulcanized - Test method of resistance to artificial weathering (Fluorescent UV lamp) (eqv ASTM G53:1988)
GB/T 16927.1-2011 High-voltage test techniques - Part 1: General definitions and test requirements (IEC 60060-1:1989, MOD)
GB/T 17650.1-1998 Test on gases evolved during combustion of materials from cables - Part 1: Determination of the amount of halogen acid gas (idt IEC 60754-1:1994)
GB/T 17650.2-1998 Test on gases evolved during combustion of materials from cables - Part 2: Determination of degree of acidity of gases by measuring pH and conductivity (idt IEC 60754-2:1991)
GB/T 17651.1-1998 Measurement of smoke density of cables burning under defined conditions - Part 1: Test apparatus (idt IEC 61034-1:1997)
GB/T 17651.2-1998 Measurement of smoke density of cables burning under defined conditions - Part 2: Test procedure and requirements (idt IEC 61034-2:1997)
GB/T 18380.35-2008 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 (IEC 60332-3-24:2000, IDT)
GB/T 18889-2002 Electric cables - Test methods for accessories for power cables with rated voltage from 6kV (Um=7.2kV) up to 35kV (Um=40.5kV) (IEC 61442:1997, MOD)
JB/T 4278.10-2011 Verification procedure for test equipment of rubber plastic wire and cable - Part 10: Spark tester
EN 50181-1997 Plug-in type bushings above 1kV up to 36kV and from 250A to 1.25kA for equipment other than liquid filled transformers

3 Terms and definitions

For the purposes of this standard, the following terms and definitions apply.

3.1
nominal value
designated value, which is frequently applied in tables. In this standard, the value evolved from nominal value is generally inspected through measurement with consideration of the specified tolerance

3.2
approximate value
value which is neither guaranteed nor checked; it is used, for example, for the calculation of other dimensional values

Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Voltage designations and materials
5 Service characteristics and conditions
6 Cable product codes and representation methods
7 Technical requirements
8 Test conditions
9 Routine test of cables
10 Sample test of cables
11 Type test of cables
12 Inspection rules of finished cables
13 Type test of accessory
14 Sampling test of accessories
15 Inspection rules of accessories
16 Electrical tests after installation
17 Acceptance rules
18 Marking, packaging, transportation and storage
Annex A (Normative) Fictitious calculation method for determination of dimensions of protective coverings
Annex B (Informative) Cable reference ampacity and correction factor
Annex C (Normative) Cable code and representation method
Annex D (Normative) General technical requirements of installation materials for termination, joints and inside cone plug-in type separable connectors
Annex E (Normative) Main performance requirements of materials for termination, joints and inside cone plug-in type separable connectors
Annex F (Normative) Inner interface dimension of inside cone bushing
Annex G (Informative) Typical structure and components of inside cone plug-in type separable connector
Annex H (Normative) Test method for cable accessories
Annex I (Normative) Test method for power frequency spark of sheath
Annex J (Normative) Rounding of numbers
Annex K (Normative) Method of measuring resistivity of cable semi-conductive shields
Annex L (Informative) Main performance requirements of silicone grease lubricant for installation
Bibliography