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GB/T 12528-2008 PDF English

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GB/T 12528-2008: Rail vehicle cables with rated voltages up to and including 3kV
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Status: Valid

GB/T 12528: Historical versions

Standard IDUSDBUY PDFDeliveryStandard Title (Description)Status
GB/T 12528-2008125 Add to Cart Auto, 9 seconds. Rail vehicle cables with rated voltages up to and including 3kV Valid
GB 12528.1-1990719 Add to Cart 5 days Insulated cables (wires) for railway vehicles of rated voltages up to and including 3 kV--General Obsolete

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GB/T 12706.1   GB/T 12706.3   GB 12528.11   GB/T 29631   

GB/T 12528-2008: Rail vehicle cables with rated voltages up to and including 3kV

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GB ICS 29.060.20 K 13 NATIONAL STANDARD GB/T 12528-2008 Replacing GB 12528.1-1990, GB 12528.11-2003 Rail vehicle cables with rated voltages up to and including 3kV Issued on. JUNE 30, 2008 Implemented on. APRIL 1, 2009. Issued by. General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China; Standardization Administration of the People's Republic of China.

Table of Contents

Foreword... 3 1 Scope... 5 2 Normative references... 5 3 Terms and definitions... 7 4 Product code, marking and sample... 8 5 Operational properties... 10 6 Model, name and specification of the product... 11 7 Technical requirements... 13 8 Test Methods... 26 9 Inspection Rules... 27 10 Marking and Package... 29 Annex A... 31 Annex B... 33 Annex C... 36 Annex D... 37 Annex E... 38

1 Scope

This Standard specifies the type, specification, technical requirement, test method, mark, and package of the cable used in rail vehicles with rated voltages up to and including 3kV. This Standard is applicable to cables used in electric units like power distribution system, control system, signal system etc. It is suitable for rail transit vehicles of rated voltages up to and including 3kV.

2 Normative references

The articles contained in the following documents have become part of this Standard when they are quoted herein. For the dated documents so quoted, all the modifications (excluding corrections) or revisions made thereafter shall not be applicable to this Standard. For the undated documents so quoted, the latest editions shall be applicable to this Standard. GB 252-2000 Light diesel fuels GB/T 1690-2006 Rubber vulcanized or thermoplastic - Determination of the effect of liquids (ISO 1817.2005, MOD) GB/T 2900.10-2001 Electrotechnical vocabulary--Electric cables (idt IEC 60050(461). 1984) GB/T 2951.1-1997 Common test methods for insulating and sheathing materials of electric cables Part 1.Methods for general application Section one. Measurement of thickness and overall dimensions—Tests for determining the mechanical properties (idt IEC 811-1-1.1993) GB/T 2951.2-1997 Common test methods for insulating and sheathing materials of electric cables--Part 1.Methods for general application--Section two. Thermal ageing methods (idt IEC 811-1-2.1985) GB/T 2951.4-1997 Common test methods for insulating and sheathing materials of electric cables Part 1.Methods for general application (idt IEC 81-1-4.1985) GB/T 2951.5-1997 Common test methods for insulating and sheathing materials of electric cables--Part 2.Methods specific to elastomeric compounds section one--Ozone resistance test--Hot set test--Mineral oil immersion test (idt IEC 811-2-1.1986) GB/T 2951.6-1997 Common test methods for insulating and sheathing materials of electric cables Part 3.Methods specific to PVC compounds section one. Pressure test at high temperature—Test for resistance to cracking (idt IEC 811-3-1.1985) 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 3048.5-2007 Test methods for electrical properties of electric cables and wires—Part 5.Test of insulation resistance

3 Terms and definitions

The following terms and definitions and those established in GB/T 2900.10-2001 apply to this Standard. 3.1 Ethylene-propylene rubber compound It is the compound of specific components including ethylene propylene rubber and/or synthetic elastomer, after the procedure of being properly selected, matched, processed and vulcanized. 3.2 CSP or equivalent synthetic compound It is the compound of specific components including chlorosulfonated polyethylene or chlorinated polyethylene synthetic elastomer after the procedure of being properly selected, matched, processed and vulcanized. 3.3 Cross-linked polyolefin compound It is the compound of specific components including polyethylene, polypropylene, and polybutylene-1 or its copolymer after the procedure of being properly selected, matched, processed and cross-linked. 3.4 Polyolefin compound for thin-wall Its special components include the polymer, copolymer and alloy of aromatic group and heteroatom (N, O and Si in main chain of polymer molecule). Or the compound of polymer and copolymer of olefin polymers, if necessary, it shall be cross-linked. 3.5 Voltage rating The voltage rating of cable refers to the reference voltage used for cable design and electrical performance test. 3.6 Type tests (Symbol T) Type test refers to testing one type cable stipulated in this Standard before delivery so as to prove that it is of good properties to satisfy the stipulated application requirements in line with general business principles. The nature of type test is that there is no need to conduct another test once the cable is tested; and there is a need to conduct another one in case that the materials or designs of the cable are changed, which will influence its properties.

4 Product code, marking and sample

4.1 Series code Product series code DC 4.2 Insulation and sheathing material code 4.3 Thermal endurance properties code 100°C 100 125°C 125 150°C 150 4.6 Product marking Products are represented by models, specifications and number of this Standard. The composition is as shown. 4.7 Example labeling a) The mineral oil and fuel oil resistant, 100°C temperature resistant class, AC rated voltage 1500V, Category 6 conductor, 95mm2, ethylene propylene rubber compound, insulated chlorosulfonated polyethylene rubber compound or other comparable synthetic elastomer sheathed cables is expressed as. DCEH/3-100 1500V 95(B) GB/T 12528-2008. b) 125°C temperature resistant class, AC rated voltage 1,500V, Category 5 conductor, 50mm2, low-smoke zero halogen cross-linked polyolefin insulated cable is expressed as. WDZ-DCYJ/1-125 1500V 50(A) GB/T 12528-2008. c) 125°C temperature resistant class, AC rated voltage 750V, Category 2 conductor, 4mm2, polyolefin insulated cable for low-smoke zero halogen thin-wall type cable is expressed as. WDZ-DCYJB/1-125 750V 4(C) GB/T 12528-2008. d) 125°C temperature resistant class, AC rated voltage 1500V, Category 5 conductor, 50mm2, low-smoke zero halogen cross-linked polyolefin insulated cable is expressed as. WDZ-DCYJ/3-125 1500V 50(A) GB/T 12528-2008.

5 Operational properties

5.1 Rated voltage of the cable AC voltage rating Uo of cable is 500V, 750V, l.5kV and 3kV. The DC rated voltage is 1.5 times the AC rated voltage.

6 Model, name and specification of the product

6.1 Product model and name See Table 1 for product model and name.

7 Technical requirements

7.1 Conductor 7.1.1 Material The copper conductor shall adopt the soft round copper wire which complies with GB/T 3956-1997.The conductor surface shall be smooth and clean, free from oil stains, no burrs and sharp edges, no raised or fractured single line. 7.1.3 Resistance Resistance of cable conductor at 20°C shall be in compliance with the provisions of Table 3. 7.2 Insulation 7.3 Sheathing 7.3.1 Material The selection of cable sheathing shall be consistent with the cable model. Select the appropriate specified compound. 7.4 Finished electric level 7.4.1 Structure size of the finished electric level The external diameter of the finished cable shall be in compliance with the provisions of Table 6-Table 11. 7.4.4 Test on leakage and discharge of cable surface Cable sheaths or surface of the single insulation layer shall be subject to surface discharge test under the test conditions specified in Table 14.And the measured value (mA) of leakage current shall not exceed half of the measured value (mm) of the cable diameter. Its flashover voltage is not less than 10kV. 7.4.10 Acidity test of combustion gas Low-smoke zero halogen flame retardant cable shall be carried out by test according to the prescribed conditions of GB/T 17650.2-1998.The pH of combustion gas acidity is ≥ 4.3; Conductivity is ≤ 10μS /mm. 7.4.11 Delivery length The length of looped cable shall be 100 m or integer multiples of 100 m and that of the plated cable shall not be less than 100 m. It is allowed to deliver short-length cable of not less than 30 m, but the quantity of such cable shall not be more than 10% of total length of delivered cable. Any length delivery is allowed according to the mutual agreements. USE length counter for the length metering and the error shall not exceed ± 0.5%.

8 Test Methods

8.1 Structure size Appearance shall be inspected by normal eyesight. Conductor structure shall be designed in accordance with GB/T 4909.2-1985. For thickness of insulation, thickness of sheath, as well as external diameter of cable and f value, it shall respectively take 1 section of sample-cable, at 3 places with interval distance of at least 1m, in accordance with GB/T 2951.1-1997. 9 Anti-rubbing test of printed marks T, S T, S T, S T, S 9.2 Acceptance rules The products shall pass the inspection by Quality Control Department of the manufacturers before leaving the factory. Outgoing products shall be accompanied by quality inspection certificate. 10.1 Mark The external surface of the cable shall be identified with continuous marks, such as the name of the manufacturer, its brand, type, nominal cross section and voltage class etc. Marking methods shall be in accordance with the requirements of GB/T 6995.1-2008 and GB/T 6995.3-2008. The mark shall be written clearly and not easy to be wiped off. Even it is slightly wiped ten times with wet absorbent cotton, it shall still be visible. 10.2 Package Cable shall be delivered in coil or in loop. And it shall be winded neatly and packaged properly. Cable drum shall be in compliance with the provisions of JB/T 8137. Each package shall be attached with labels, indicating. ......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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