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GB/T 12706.2-2020 English PDF

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US$1229.00 · In stock
Delivery: <= 8 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 12706.2-2020: Power cables with extruded insulation and their accessories for rated voltages from 1 kV (Um=1.2 kV) up to 35 kV (Um=40.5 kV) - Part 2: Cables for rated voltages from 6 kV (Um=7.2 kV) up to 30 kV (Um=36 kV)
Status: Valid

GB/T 12706.2: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 12706.2-2020	1229	Add to Cart	8 days	Power cables with extruded insulation and their accessories for rated voltages from 1 kV (Um=1.2 kV) up to 35 kV (Um=40.5 kV) - Part 2: Cables for rated voltages from 6 kV (Um=7.2 kV) up to 30 kV (Um=36 kV)	Valid
GB/T 12706.2-2008	RFQ	ASK	7 days	Power cables with extruded insulation and their accessories for rated voltages from 1kV (Um=1.2kV) up to 35kV (Um=40.5kV) -- Part 2: Cables for rated voltages from 6kV (Um=7.2kV) up to 30kV (Um=36kV)	Obsolete
GB/T 12706.2-2002	RFQ	ASK	9 days	Extruded insulation rated voltage of 1 kV (Um = 1. 2 kV) to 35 kV (Um = 40. 5 kV) power cables and accessories -- Part 2: The rated voltage of 6 kV (Um = 7. 2 kV) to 30 kV (Um = 36 kV) cable	Obsolete
GB 12706.2-1991	279	Add to Cart	3 days	Copper or aluminium conductor extruded plastic insulated power cables with rated voltages up to 35kV--Part 2: Polyvinyl chloride insulated power cables	Obsolete

Similar standards

GB/T 12706.1 GB/T 12706.4 GB/T 12706.3 GB/T 29631 GB/T 11017.1

Basic data

Standard ID: GB/T 12706.2-2020 (GB/T12706.2-2020)
Description (Translated English): Power cables with extruded insulation and their accessories for rated voltages from 1 kV (Um=1.2 kV) up to 35 kV (Um=40.5 kV) - Part 2: Cables for rated voltages from 6 kV (Um=7.2 kV) up to 30 kV (Um=36 kV)
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: K13
Classification of International Standard: 29.060.20
Word Count Estimation: 66,621
Date of Issue: 2020-03-31
Date of Implementation: 2020-10-01
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 12706.2-2020: Power cables with extruded insulation and their accessories for rated voltages from 1 kV (Um=1.2 kV) up to 35 kV (Um=40.5 kV) - Part 2: Cables for rated voltages from 6 kV (Um=7.2 kV) up to 30 kV (Um=36 kV)

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Power cables with extruded insulation and their accessories for rated voltages from 1 kV (Um = 1.2 kV) up to 35 kV (Um = 40.5 kV)-Part 2.Cables for rated voltages from 6 kV (Um = 7.2 kV) up to 30 kV (Um = 36 kV) ICS 29.060.20 K13 National Standards of People's Republic of China Replace GB/T 12706.2-2008 Rated voltage 1kV (Um = 1.2kV) to 35kV (Um = 40.5kV) Extruded insulated power cable and accessories Part 2.Rated voltage 6kV (Um = 7.2kV) to 30kV (Um = 36kV) cable (IEC 60502-2..2014, Powercableswithextrudedinsulationandtheir accessoriesforratedvoltagesfrom1kV (Um = 1.2kV) upto30kV (Um = 36kV) -Part 2.Cablesforratedvoltagesfrom6kV (Um = 7.2kV) upto30kV (Um = 36kV), MOD) 2020-03-31 Release 2020-10-01 Implementation State Administration of Market Supervision and Administration Issued by the National Standardization Management Committee

Foreword Ⅲ 1 Scope 1 2 Normative references 1 3 Terms and definitions 3 4 Voltage labels and materials 3 5 Conductor 5 6 Insulation 6 7 Shield 8 8 Core, inner lining and filling of three-core cable 8 9 Metallic layer of single-core or three-core cable 9 10 Metal Shield 10 11 Concentric conductor 10 12 Metal sleeve lead sleeve 10 13 Metal armor 11 14 outer sheath 13 15 Test conditions 14 16 Routine test 14 17 Sampling test 16 18 Electrical Type Test 21 19 Non-electrical type test 26 20 Electrical test after installation 37 21 Supplementary terms for cable products 38 Appendix A (Normative Appendix) Hypothetical calculation method for determining the size of the sheath 39 Appendix B (Normative Appendix) Rounding of Values 43 Appendix C (Informative) Determination of cable conductor temperature 45 Appendix D (Normative Appendix) Method for Measuring the Resistivity of Semiconductive Shield 49 Appendix E (Normative Appendix) HEPR Insulation Hardness Determination 51 Appendix F (Normative Appendix) Permeability Test 53 Appendix G (Normative Appendix) Supplementary Terms for Cable Products 55 References 59 Figure C.1 Typical layout of reference circuit and test circuit 46 Figure C.2 Reference to the layout example of the temperature sensor on the loop conductor 46 Figure D.1 Conductor shield volume resistivity measurement 49 Figure D.2 Insulation shield volume resistivity measurement 49 Figure E.1 Measurement of large curvature surfaces 52 Figure E.2 Measurement of small curvature surfaces 52 Figure F.1 Schematic diagram of longitudinal water permeability test 54 Figure G.1 Composition and arrangement order of product models 56 Table 1 Rated voltage U0 recommended value 4 Table 2 Insulation mixture 4 Table 3 The maximum temperature of the conductors of various insulation mixture cables 5 Table 4 Maximum conductor temperature of different types of sheathed mixed cable 5 Table 5 Test methods and requirements for halogen-free mixtures 6 Table 6 Polyvinyl chloride (PVC/B) insulation nominal thickness 6 Table 7 Cross-linked polyethylene (XLPE) insulation nominal thickness 7 Table 8 Nominal thickness of insulation of ethylene-propylene rubber (EPR) and hard ethylene-propylene rubber (HEPR) 7 Table 9 Thickness of extruded inner lining 9 Table 10 Armored round wire nominal diameter 12 Table 11 Nominal thickness of armored metal tape 13 Table 12 Routine test voltage 16 Table 13 Number of sampling test samples 17 Table 14 Sampling test voltage 19 Table 15 Test requirements for special properties of various thermosetting insulating mixtures 20 Table 16 Elastomer sheath special performance test requirements 20 Table 17 Electrical type test requirements for cable insulation 23 Table 18 Impulse voltage 24 Table 19 Non-electrical type test 26 Table 20 Cable insulation mechanical performance test requirements (before and after aging) 29 Table 21 Sheath mechanical performance test requirements (before and after aging) 30 Table 22 PVC sheath special performance test requirements 31 Table 23 PVC insulation special performance test requirements 32 Table 24 PE (thermoplastic polyethylene) sheath special performance test requirements 32 Table 25 Special performance test requirements of halogen-free sheath 33 Table A.1 The assumed diameter of the conductor 39 Table A.2 Concentric conductors and metal shields increase the diameter by 41 Table A.3 Diameter increase due to additional cushion 42 Table B.1 Rounding digits of specified value, measured value or calculated value 44 Table G.1 Common cable models 56 Table G.2 Minimum bending radius of cable installation 58

Foreword

GB/T 12706 "Extruded insulated power cable and accessories with rated voltage of 1kV (Um = 1.2kV) to 35kV (Um = 40.5kV)" For 4 parts. --- Part 1.rated voltage 1kV (Um = 1.2kV) and 3kV (Um = 3.6kV) cables; --- Part 2.Cable with rated voltage of 6kV (Um = 7.2kV) to 30kV (Um = 36kV); --- Part 3.Cable with rated voltage 35kV (Um = 40.5kV); --- Part 4.Test requirements for cable accessories with rated voltages of 6kV (Um = 7.2kV) to 35kV (Um = 40.5kV). This part is part 2 of GB/T 12706. This part replaces GB/T 12706.2-2008 "Extruded insulation of rated voltage 1kV (Um = 1.2kV) to 35kV (Um = 40.5kV) Power cables and accessories. Part 2.Rated voltage 6kV (Um = 7.2kV) to 30kV (Um = 36kV) cables. Compared with GB/T 12706.2-2008, the main technical changes except for editorial changes are as follows. --- Added halogen-free flame retardant (ST8) sheath material (see Table 4); --- Added requirements for halogen-free flame-retardant cable insulation, inner lining and filling, isolation sleeve and outer sheath (see 6.1, 8.2.2, 13.3.3, 14.2 and Table 5); --- Increased the nominal insulation thickness of the rated voltage 18/20 (24) kV cable (see Table 7 and Table 8); --- Modify the requirements of the extruded inner liner and the wrapped inner liner (see 8.2, 8.1 in the.2008 edition); --- Revised the regulations on the coverage rate of copper strips (see 10.2.3,.2008 version 10.2.3); --- Modified the formula for calculating the nominal thickness of the lead sleeve (see Chapter 12, 12.1 of the.2008 edition); --- Amended the provisions of the armor material (see 13.2, 13.2 of the.2008 edition); --- Added the requirements for the diameter of the thick round wire and the nominal thickness of the insulating sleeve or inner liner under the armor (see 13.4, Table 10 and 13.6); --- The thickness of the outer sheath has been modified (see 14.3, 14.3 of the.2008 edition); --- Added the determination method of cable conductor temperature in the test (see 15.4 and Appendix C); --- Increased the withstand voltage test of the outer sheath with semi-conductive layer (see 16.1 and 16.5); --- Modified the thickness requirements for non-metallic sheaths (see 17.5.3 and 19.3,.2008 version 17.5.3 and 19.2); --- Increasing the measurement of the wrapping rate of the wrapping tape and the gap rate of the metal tape (see 17.11); --- Increasing the thickness measurement of the inner liner and/or tape cushion (see 17.12 and 19.26); --- Amended the cylinder diameter for bending test (see 18.2.4, 18.1.3 of the.2008 edition); --- Added the measurement requirements for the thickness of the lead sleeve (see 19.4); --- Increasing the halogen-free flame retardant (ST8) jacket material mechanical properties, high temperature pressure, low temperature performance, combustion performance and water absorption performance test (see 19.6, 19.7, 19.9, 19.10, 19.16, 19.25, Table 21 and Table 25); --- Modified the cable flame retardant test (see 19.16,.2008 version 19.14); --- Modify the applicable object of carbon black content test of black polyethylene sheath (see 19.17.1,.2008 version 19.15.1); --- Modified the electrical test requirements after cable installation (see 20.3.1,.2008 version 20.2.1); --- Removed the heat extension test load time (see Table 15 and Table 16, the.2008 version of Table 19 and Table 23); --- Modified the electrical test requirements for insulation (see Table 17, Table 15 of the.2008 edition); --- Increased the rule of rounding off the specified value (see B.3); --- Increased the polyolefin outer sheath code (see G.1.1); --- Added the product representation method of flame retardant cables (see G.1.3); --- Increased delivery length and marking requirements for finished cables (see G.2.2 and G.2.3); --- Added the recommended ambient temperature for halogen-free flame-retardant sheathed cable installation (see G.3.1). This section uses the redrafting method to modify the use of IEC 60502-2..2014 "rated voltage 1kV (Um = 1.2kV) to 30kV (Um = 36kV) Extruded insulated power cables and accessories Part 2.Rated voltage 6kV (Um = 7.2kV) to 30kV (Um = 36kV) cable". Compared with IEC 60502-2..2014, this part has some changes in structure, mainly as follows. --- According to the requirements of GB/T 1.1-2009, the suspension section of 17.9 was adjusted; --- Added Table 5 and Table 25; --- Adjusted the number of the table in the order mentioned, starting from Table 6, the correspondence between the table of this part and the table of IEC 60502-2..2014 Table 6 corresponds to Table 5, Table 7 corresponds to Table 6, Table 8 corresponds to Table 7, Table 9 corresponds to Table 8, Table 10 corresponds to Table 9, Table 11 corresponds to Table 10, Table 12 corresponds to Table 11, Table 13 corresponds to Table 12, Table 14 corresponds to Table 13, Table 15 corresponds to Table 19, Table 16 corresponds to Table 23, Table 17 pairs Table 15, Table 18 corresponds to Table 14, Table 19 corresponds to Table 16, Table 20 corresponds to Table 17, Table 21 corresponds to Table 20, Table 22 corresponds to Table 21, Table 23 corresponds to Table 18, Table 24 corresponds to Table 22; --- Removed 12.1 and 12.2; --- Increased 17.11, 17.12, 19.25 and 19.26; --- Added Chapter 21; --- Deleted Appendix B, added Appendix G, so that the appendix number has changed. Appendix B of this part corresponds to IEC 60502-2..2014 Appendix C, Appendix C corresponds to Appendix G of IEC 60502-2..2014. There are technical differences between this part and IEC 60502-2..2014.The main technical differences and their causes are as follows. --- With regard to normative quotation documents, this part has been adjusted with technical differences to adapt to my country's technical conditions and adjustments The situation is reflected in Chapter 2 "Regulatory Reference Documents", with specific adjustments as follows. ● Replaced IEC 60038 (see 4.1) with GB/T 156 modified to adopt international standards; ● Replaced IEC 60811-201, IEC 60811-202 with GB/T 2951.11-2008 equivalent to international standards IEC 60811-203 and IEC 60811-501 (see 17.5.1, 17.8, 19.2.2, 19.3.2, 19.4.2, 19.5.3, 19.6.1, 19.6.3, 19.21.1, Table 16, Table 20 and Table 21); ● Replaced IEC 60811-401 with GB/T 2951.12-2008 equivalent to international standards (see 19.5.2, 19.6.2, 19.7, Table 20 and Table 21); ● Replaced IEC 60811-402, IEC 60811-502 with GB/T 2951.13-2008 equivalent to international standards IEC 60811-503 and IEC 60811-606 (see 19.15.1, 19.18.1, 19.22.1, 19.25.1, Table 15, Table 23, Table 24 And Table 25); ● Replaced IEC 60811-504, IEC 60811-505 and IEC 60811-504 with GB/T 2951.14-2008 equivalent to adopting international standards IEC 60811-506 (see 19.10, Table 22, Table 23 and Table 25); ● Replaced IEC 60811-403, IEC 60811-404 and IEC 60811-403 with GB/T 2951.21-2008 equivalent to adopting international standards IEC 60811-507 (see 17.10.1, 19.12, 19.14.1, Table 15 and Table 16); ● Replace IEC 60811-508 and IEC 60811-509 with GB/T 2951.31-2008 equivalent to the international standard (see 19.9, 19.11, Table 22, Table 23, Table 24 and Table 25); ● Replaced IEC 60811-405 and IEC 60811-409 with GB/T 2951.32-2008 equivalent to international standards (see 19.8.1, 19.19.1, Table 22 and Table 23); ● Replaced IEC 60811-605 with GB/T 2951.41-2008 equivalent to international standards (see 19.17.1 and Table 24); ● Added reference to GB/T 3048.10 (see 13.3.3 and 14.1); ● Replaced IEC 60885-3 with GB/T 3048.12 modified to adopt international standards (see 16.3 and 18.2.5); ● Replaced IEC 60230 with GB/T 3048.13 modified to adopt international standards (see 15.3, 18.2.8 and 18.3.5.1); ● Replace IEC 60228 with GB/T 3956 equivalent to international standards (see Chapter 5, 10.2.1, 16.2 and 17.4); ● Added reference to GB/T 6995.3 (see G.2.3); ● Added reference to GB/T 7113.2 (see 19.16.6.1 and Table 5); ● Added reference to GB/T 8170 (see B.3); ● Added reference to GB/T 11017.2-2014 (see 10.2.2); ● Added reference to GB/T 11091 (see 10.2.3); ● Added reference to GB/T 12706.1 (see Tables 2, 17.11 and 17.12); ● Replaced IEC 60060-1 with GB/T 16927.1 modified to adopt international standards (see 15.3); ● Replaced IEC 60060-3 with GB/T 16927.3 modified to adopt international standards (see 20.3.1); ● Removed IEC 60287-3-1; ● Added references to GB/T 17650.1 and GB/T 17650.2 (see 19.16 and Table 5); ● Add references to GB/T 18380.11 and GB/T 18380.13 (see 19.16.1); ● Replaced IEC 60332-1-2 with GB/T 18380.12 equivalent to international standards (see 19.16.1); ● Added references to GB/T 18380.33, GB/T 18380.34, GB/T 18380.35 and GB/T 18380.36 19.16.2); ● Added reference to GB/T 19666 (see G.1.3); ● Added reference to JB/T 8137 (all parts) (see G.2.4.1); ● JB/T 8996, which is a non-equivalent international standard, replaces IEC 60183 (see 4.1); ● Increased reference to IEC 61034-2 (see 19.16.3); ● The non-normative references of IEC 60853 and IEC 60986 are included in the references. --- In order to adapt to the technical requirements of our country, the hypothetical value terminology has been deleted (see Chapter 3); --- In order to meet the technical requirements of our country, the nominal insulation thickness of the rated voltage 18/20 (24) kV cable has been added (see Table 7 and Table 8); --- In order to adapt to the technical requirements of my country, the thickness regulations (see 8.2.3 and 8.2.4) and technical requirements of the inner liner of the extrusion and wrapping are revised (See 17.5, 17.12, 19.3 and 19.26); --- In order to meet the technical requirements of my country, the thickness test requirements of the extruded inner lining have been increased (see 17.5 and 193.); --- In order to clarify the requirements of copper tape materials for cables, the content of copper tape raw materials has been added (see 10.2.3); --- In order to ensure the quality of the extruded insulation sleeve and outer sheath, the spark test requirements for the extruded insulation sleeve and outer sheath (see 13.3.3 and 14.1); --- In order to meet the technical requirements of my country, the thickness of thick round metal wire and the nominal thickness gauge of the insulating sleeve or inner liner under armor are added (See 13.4, Tables 10 and 13.6); --- In order to meet the technical requirements of my country, add halogen-free flame retardant sheath materials (see Tables 4 and 14.2) and the corresponding requirements and tests (see 19.16, 19.25, Table 5 and Table 24); --- In order to meet the technical requirements of our country, the regulations and measurement of wrap rate and gap ratio (see 17.11) and the inner liner of the wrap are added And/or thickness measurement of tape cushion (see 17.12 and 19.26); --- In order to improve the domestic combustion requirements for power cables, the cable non-flammability test was modified (see 19.16); --- In order to improve the domestic technical requirements for power cables, the rules for rounding up of specified values (see B.3) and supplementary articles for cable products are added (See Chapter 21 and Appendix G). The following editorial changes have been made in this section. --- In order to adapt to my country's technical standard system, the standard name was changed to "rated voltage 1kV (Um = 1.2kV) to 35kV (Um = 40.5kV) Extruded insulated power cables and accessories Part 2.Rated voltage 6kV (Um = 7.2kV) to 30kV (Um = 36kV) cable"; --- Deleted the informative appendix B of IEC 60502-2..2014 "The rated voltage of 3.6/6kV to 18/30kV extruded insulated cable Continuous Ampacity List ". This part is proposed by China Electrical Equipment Industry Association. This part is under the jurisdiction of the National Wire and Cable Standardization Technical Committee (SAC/TC213). This section was drafted by. Shanghai Cable Research Institute Co., Ltd., China Electric Power Research Institute, Shanghai National Cable Testing Center Co., Ltd., Bao Sheng Technology Innovation Co., Ltd., Jiangsu Shangshang Cable Group Co., Ltd., Far East Cable Co., Ltd., Wuxi Jiangnan Cable Co., Ltd., China Sky Technology Submarine Cable Co., Ltd., Zhejiang Wanma Co., Ltd., Hangzhou Cable Co., Ltd., Jiangsu Hengtong Power Cable Co., Ltd., Qing Daohan Cable Co., Ltd., Jinbei Electric Co., Ltd., Guangzhou Nanyang Cable Co., Ltd., Fujian Nanping Solar Cable Co., Ltd. Division, Shanghai Huapu Cable Co., Ltd., Ningbo Ball Crown Cable Co., Ltd., Kunming Cable Group Co., Ltd., Hangzhou Huaxin Power Line Cable Co., Ltd., Shanghai Feihang Wire and Cable Co., Ltd., Zhengzhou Huali Cable Co., Ltd., Yangzhou Shuguang Cable Co., Ltd., Lexing Red Qi Cable (Hubei) Co., Ltd., Hainan Weite Electric Group Co., Ltd., Lanzhou Zhongbang Wire and Cable Group Co., Ltd., Shanghai Pudong Wire Cable (Group) Co., Ltd., Shandong Taikai Cable Co., Ltd. The main drafters of this section. Sun Jiansheng, Zhao Jiankang, He Jinhong, Fang Quansheng, Li Bin, Wang Chuanbin, Liu Jun, Xie Shuhong, Liu Huanxin, Teng Zhaofeng, Guan Xinyuan, Wang Ye, Yang Wenfeng, Wang Zhihui, Fan Defa, Zhou Yan, Wen Shanghai, Xi Youjian, Guo Haijun, Hu Shaozhong, Zhao Hongyan, Liang Guohua, Wang Bai, Li Ju, Wei Yongqian, Chen Wei, Li Zhong, Shi Nannan, Zhu Tao, Du Qing. The previous versions of the standard replaced by this part are as follows. --- GB 12706.2-1991, GB/T 12706.2-2002, GB/T 12706.2-2008; --- GB 12706.1-1991; --- GB 12706.3-1991. Rated voltage 1kV (Um = 1.2kV) to 35kV (Um = 40.5kV) Extruded insulated power cable and accessories Part 2.Rated voltage 6kV (Um = 7.2kV) to 30kV (Um = 36kV) cable

1 Scope

This part of GB/T 12706 specifies the structure, size and test of extruded insulated power cables with a rated voltage of 6kV to 30kV Claim. This section applies to fixed-installed power cables with rated voltages ranging from 6kV to 30kV installed in distribution networks or industrial installations. Headquarters The points also apply to longitudinal water-blocking structure cables and their tests. When deciding on the cable application, the possible risks of radial water ingress should be considered. This section does not apply to cables with special installation and operating conditions, such as overhead cables, mining industry, nuclear power plants Near), and underwater or ship cables.

2 Normative references

The following documents are essential for the application of this document. For dated references, only the dated version applies to this article Pieces. For the cited documents without date, the latest version (including all amendments) applies to this document. GB/T 156 standard voltage (GB/T 156-2017, IEC 60038..2009, MOD) GB/T 2951.11-2008 General test methods for insulating and sheathing materials of electric cables and optical cables. Part 11.General test methods Thickn......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 12706.2-2020_English be delivered?

Answer: Upon your order, we will start to translate GB/T 12706.2-2020_English as soon as possible, and keep you informed of the progress. The lead time is typically 5 ~ 8 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GB/T 12706.2-2020_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 12706.2-2020_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.

Question 5: Should I purchase the latest version GB/T 12706.2-2020?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 12706.2-2020 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.