GB/T 18890.2-2015Power cables with cross-linked polyethylene insulation and their accessories for rated voltage of 220 kV (Um=252 kV) —Part 2: Power cables (English PDF)

Foreword

GB/T 18890 "Power cables with cross-linked polyethylene insulation and their accessories for rated voltage of 220 kV (Um = 252 kV)" is divided into three parts.

- Part 1. Test methods and requirements;

- Part 2. Power cables;

- Part 3. Accessories.

This Part is Part 2 of GB/T 18890.

This Part is drafted in accordance with the rules given in GB/T 1.1-2009.

This Part replaces GB/Z 18890.2-2002 "Power cables with cross-linked polyethylene insulation and their accessories for rated voltage of 220 kV (Um = 252 kV) - Part 2:

Power cables with cross-linked polyethylene insulation for rated voltage of 220 kV (Um = 252 kV)". Compared with GB/Z 18890.2-2002, the main technical changes of this Part are as follows.

- The nature of the standard is revised FROM technical guidance document TO recommended standard;

- The standard name is revised FROM "Power cables with cross-linked polyethylene insulation and their accessories for rated voltage of 220 kV (Um = 252 kV) - Part 2. Power cables with cross-linked polyethylene insulation for rated voltage of 220 kV (Um = 252 kV)" TO "Power cables with cross-linked polyethylene insulation and their accessories for rated voltage of 220 kV (Um = 252 kV)";

- ADD the definition of metal-plastic laminated sheathes (see 3.2);

- ADD use characteristics and power cable ampacity (see 4.3);

- ADD the code, model and name of metal-plastic laminated sheathes (see 5.1, Table 1);

- MODIFY the note of corrugated aluminum sheathes (see Table 1, note of 5.1 in 2002 edition);

- ADD the requirements and labeling methods for copper wire shielding (see 5.3);

- DELETE Chapter 6 "Materials" in 2002 edition, its content is included in the relevant chapters of technical requirements;

1 Scope

This Part of GB/T 18890 specifies the model, naming, technical requirements, test and inspection rules, packaging, transportation and storage of fixedly installed power cables with cross-linked polyethylene insulation for rated voltage of 220 kV (Um = 252 kV).

This Part applies to single-core power cables used under normal installation and operating conditions; it is not applicable to the cables used under special conditions, such as submarine power cables.

2 Normative references

The following documents are essential to the application of this document. For the dated documents, only the versions with the dates indicated are applicable to this document; for the undated documents, only the latest version (including all the amendments) are applicable to this document.

GB/T 494-2010 Asphalt used in roofing

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

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 aging methods

GB/T 2951.14-2008 Common test methods for insulating and sheathing materials of electric and optical cables - Part 14: Common test methods - Low Temperature Test

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

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

GB/T 2951.32-2008 Common test methods for insulating and sheathing materials of electric and optical cables - Part 32: Methods specific to PVC compounds - Loss of mass test - Thermal stability test

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

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

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

GB/T 3048.13-2007 Test methods for electrical properties of electric cables and wires - Part 13: Impulse voltage test

GB/T 3048.14-2007 Test methods for electrical properties of electric cables and wires - Part 14: DC voltage test

GB/T 3880.1-2012 Wrought aluminium and aluminium alloy plates, sheets and strips for general engineering - Part 1: Technical conditions of delivery

GB/T 3953 Round copper wire for electrical purposes

GB/T 3956 Conductors of insulated cables

GB/T 6995.3-2008 Markings for electric wires and cables - Part 3: Identifications of cables and wires

GB/T 18380.12-2008 Test 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 18890.1-2015 Power cables with cross-linked polyethylene insulation and their accessories for rated voltage of 220 kV (Um = 252 kV) - Part 1: Test methods and requirements

GB/T 26011-2010 Lead alloy ingot for cable sheath bond

JB/T 5268.1-2011 Metal sheaths for cables - Part 1: General requirement

JB/T 8137 (all parts) Delivery drums for wires and cables

JB/T 10181.11-2014 Calculation of the current rating of electric cables - Part 1:

Current rating equations (100% load factor) and calculation of losses - Section 1. General

JB/T 10259 Waterblocking tape for electric cables and optical fiber cables

JB/T 10696.5-2007 Test methods for determining mechanical physical and chemical properties of electric cables and wires - Part 5: Corrosion spread test

JB/T 10696.6-2007 Test methods for determining mechanical physical and chemical properties of electric cables and wires - Part 6: Test for abrasion of oversheaths

YD/T 723-2007 (all parts) Laminated metal plastic strip for communication cable and optical fibre cable

IEC 60183 Guidance for the selection of high-voltage a.c. cable systems

3 Terms and definitions

The following terms and definitions and those defined in GB/T 18890.1-2015 apply to this document.