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GB/T 3048.12-2025 English PDF

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GB/T 3048.12-2025: Test methods for electrical properties of electric cables and wires - Part 12: Partial discharge test
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GB/T 3048.12: Evolution and historical versions

Standard ID	Contents [version]	USD	STEP2	[PDF] delivered in	Standard Title (Description)	Status	PDF
GB/T 3048.12-2025	English	439	Add to Cart	4 days [Need to translate]	Test methods for electrical properties of electric cables and wires - Part 12: Partial discharge test	Valid	GB/T 3048.12-2025
GB/T 3048.12-2007	English	519	Add to Cart	4 days [Need to translate]	Test methods for electrical properties of electric cables and wires -- Part 12: Partial discharge test	Valid	GB/T 3048.12-2007
GB/T 3048.12-1994	English	399	Add to Cart	3 days [Need to translate]	Test methods for determining electrical properties of electric cables and wires. Partial discharge test	Obsolete	GB/T 3048.12-1994
GB 3048.12-1983	English	359	Add to Cart	3 days [Need to translate]	Electric wires and cables--Test methods for partial discharge measurements	Obsolete	GB 3048.12-1983

Standard similar to GB/T 3048.12-2025

GB/T 3048.4 GB/T 3048.11 GB/T 3048.13

Basic data

Standard ID	GB/T 3048.12-2025 (GB/T3048.12-2025)
Description (Translated English)	Test methods for electrical properties of electric cables and wires - Part 12: Partial discharge test
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	K13
Classification of International Standard	29.060.20
Word Count Estimation	22,244
Date of Issue	2025-10-05
Date of Implementation	2026-05-01
Older Standard (superseded by this standard)	GB/T 3048.12-2007
Issuing agency(ies)	State Administration for Market Regulation and Standardization Administration of China

GB/T 3048.12-2025: Test methods for electrical properties of electric cables and wires - Part 12: Partial discharge test

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ICS 29.060.20 CCSK13 National Standards of the People's Republic of China Replaces GB/T 3048.12-2007 Electrical performance test methods for wires and cables Part 12.Partial Discharge Test Part 12.Partial Discharge Test Released on October 5, 2025; to be implemented on May 1, 2026. State Administration for Market Regulation The State Administration for Standardization issued a statement.

Preface III Introduction V 1.Scope 1 2 Normative References 1 3.Terms and Definitions 1 4.Test Equipment 1 5.Sample Preparation 6.Experimental Procedure 7.Precautions 8. 8.Calibration of test equipment 9. 9.Experimental Records Appendix A (Informative) This document corresponds to the structural numbering of IEC 60885-3.2015.10 Appendix B (Normative) Requirements for Termination Impedance 12 Appendix C (Normative) Method for Plotting Double Pulse Curves 13

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1.Structure and Drafting Rules of Standardization Documents". Drafting. This document is Part 12 of GB/T 3048 "Test Methods for Electrical Properties of Wires and Cables". GB/T 3048 has published the following... part. ---Part 1.General Provisions; ---Part 2.Resistivity Testing of Metallic Materials; ---Part 3.Volume Resistivity Tests for Semiconducting Rubber and Plastic Materials; ---Part 4.Conductor DC Resistance Test; ---Part 5.Insulation Resistance Test; ---Part 7.Tracking Resistance Test; ---Part 8.AC Voltage Test; ---Part 9.Spark Test of Insulated Wire Cores; ---Part 10.Spark Test for Extruded Sheaths; ---Part 11.Dielectric Loss Tangent Test; ---Part 12.Partial Discharge Tests; ---Part 13.Impulse Voltage Test; ---Part 14.DC Voltage Test; ---Part 16.Surface Resistance Test. This document supersedes GB/T 3048.12-2007 "Test Methods for Electrical Properties of Wires and Cables - Part 12.Partial Discharge Test", and is consistent with... Compared with GB/T 3048.12-2007, apart from structural adjustments and editorial changes, the main technical changes are as follows. ---The detection sensitivity has been changed (see 4.2.6,.2007 version 4.2.6); ---The expression of measurement results has been changed (see 4.2.6, 6.2.2, 6.3.2, 6.3.3, 6.4.2, 6.4.3.2, and 4.2.6 and 6.2.2 in the.2007 edition). 6.2.3, 6.3.2, 6.3.3, 6.4.2, 6.4.3.2). This document is modified to adopt IEC 60885-3.2015 "Test methods for electrical properties of cables - Part 3.Partial discharge of whole extruded power cables". Test Methods. This document has undergone significant structural adjustments compared to IEC 60885-3.2015.A comparison of the structural numbering changes between the two documents is provided below. See Appendix A for the table. The technical differences between this document and IEC 60885-3.2015, and the reasons therefor, are as follows. ---The normative reference GB/T 3048.1 (see 3.5.1) has been added to adapt to my country's technical conditions and increase operability; ---Chapter 4 of IEC 60885-3.2015, which contained a description of partial discharge, has been deleted; ---The normative reference GB/T 3048.8-2025 (see 6.6.1, 7.2) has been added to increase the operability of the test; ---The normative reference JB/T 10435 (see 7.4, Chapter 8) has been added to adapt to my country's technical conditions and increase operability; ---Change 5.6 of IEC 60885-3.2015 to Appendix B because the "requirements for terminating impedance" are mainly based on theoretical estimations and are relatively few. The measurement method used; ---Change 5.5 of IEC 60885-3.2015 to Annex C, because "drawing a double-pulse diagram" is not necessary for cable partial discharge testing. The steps are for the verification of test circuits only; ---The types and requirements for test terminals have been expanded (see 5.2) because cable terminals without partial discharge are essential for partial discharge testing techniques. An important component; ---Added precautions (see Chapter 7) to improve cable partial discharge testing techniques. The following editorial changes have been made to this document. ---To align with existing standards, the standard title has been changed to "Test Methods for Electrical Properties of Wires and Cables - Part 12.Partial Discharge Test"; ---Added Appendix A (information) "Comparison of chapter and clause numbers in this document with those in IEC 60885-3.2015". Please note that some content in this document may involve patents. The issuing organization of this document assumes no responsibility for identifying patents. This document was proposed by the China Electrical Equipment Industry Association. This document is under the jurisdiction of the National Technical Committee on Standardization of Wires and Cables (SAC/TC213). This document was drafted by. Shanghai Guolan Testing Co., Ltd., Shanghai Cable Research Institute Co., Ltd., Far East Submarine Cable Co., Ltd., and Qingdao... Hanlan Cable Co., Ltd., TBEA Shandong Luneng Taishan Cable Co., Ltd., Aerospace Ruichi Cable Co., Ltd., Shanghai Qifan Cable Co., Ltd. Limited Liability Company. The main drafters of this document are. Li Chuang, Gu Xiao, Xia Junfeng, Xu Jing, Zhang Yanhua, Dai Jiamin, Xu Jun, Zhang Xiangqiang, Wang Hongchang, and Fan Hongxin. The release history of this document and the document it replaces is as follows. ---First published as GB 3048.12-1983 in 1983, first revised as GB/T 3048.12-1994 in.1994, and revised again in.2007. The second revision was GB/T 3048.12-2007; ---This is the third revision.

Introduction

Wires and cables are widely used in power transmission and signal transmission, and various types of products are available depending on the application scenario. Electrical performance is a key evaluation criterion. GB/T 3048 is an important general indicator of the performance of electrical wires and cables, and is of great significance for ensuring the design and use objectives of electrical wires and cables. GB/T 3048 establishes universal fundamental test methods applicable to the electrical performance testing of different types of wires and cables. It is proposed that these methods be developed by the following 14 departments. Composition. ---Part 1.General Provisions. This document aims to define the terminology, definitions, and general provisions for testing the electrical properties of wires and cables. ---Part 2.Resistivity Testing of Metallic Materials. The purpose is to specify the testing methods and requirements for the resistivity of metallic materials in wires and cables. ---Part 3.Volume Resistivity Test for Semiconducting Rubber and Plastic Materials. The purpose is to determine the volume resistivity of semiconducting rubber and plastic materials used in wires and cables. Test methods and requirements for resistivity. ---Part 4.DC Resistance Test for Conductors. The purpose is to specify the test methods and requirements for the DC resistance of conductors in wires and cables. ---Part 5.Insulation Resistance Test. The purpose is to specify the test methods and requirements for the insulation resistance of wires and cables. ---Part 7.Tracking Resistance Test. The purpose is to specify the test methods and requirements for the tracking resistance of wires and cables. ---Part 8.AC Voltage Test. The purpose is to specify the test methods and requirements for AC voltage of wires and cables. ---Part 9.Spark Test of Insulated Cores. The purpose is to specify the test methods and requirements for spark testing of insulated cores in electrical wires and cables. ---Part 10.Spark Test for Extruded Sheaths. The purpose is to specify the test method and procedures for the spark test when extruding the corrosion-resistant sheath of wires and cables. Require. ---Part 11.Dielectric Loss Tangent Test. The purpose is to specify the test method for the dielectric loss tangent of wires and cables. Require. ---Part 12.Partial Discharge Tests. The purpose is to specify the test methods and requirements for partial discharge in wires and cables. ---Part 13.Impulse Voltage Test. The purpose is to specify the test methods and requirements for impulse voltage of wires and cables. ---Part 14.DC Voltage Test. The purpose is to specify the test methods and requirements for DC voltage of wires and cables. ---Part 16.Surface Resistance Test. The purpose is to specify the test methods and requirements for the surface resistance of wires and cables. Note. The original GB/T 3048 standard system had 16 parts, but GB/T 3048.5-2007 replaced GB/T 3048.5-1994 and GB/T 3048.6- GB/T 3048.9-2007 replaced GB/T 3048.9-1994 and GB/T 3048.15-1994, therefore the current GB/T 3048 standard system has fewer standards. Parts 6 and 15. Test methods for electrical properties of wires and cables Part 12.Partial Discharge Test

1 Scope

This document describes the test method for partial discharge of wires and cables, including test equipment, sample preparation, test procedure, precautions, and testing... Calibration and testing records of the testing equipment. This document is applicable to measuring partial discharge in extruded insulated power cables of different lengths. This document is not applicable to partial discharge measurements after cable system installation.

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included. For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies. This document. GB/T 3048.1 Test methods for electrical properties of wires and cables - Part 1.General principles GB/T 3048.8-2025 Electrical Performance Tests for Wires and Cables - Part 8.AC Voltage Tests GB/T 7354-2018 Partial Discharge Measurement using High Voltage Testing Techniques (IEC 60270.2000, MOD) Note. There are no technical differences between the content referenced in GB/T 7354-2018 and the content referenced in IEC 60270.2000. JB/T 10435 Verification Method for Partial Discharge Test System of Cable

3 Terms and Definitions

The terms and definitions defined in GB/T 3048.1 and GB/T 7354-2018 apply to this document. 4.Test Equipment 4.1 Test Circuit 4.1.1 Composition of the test circuit The test circuit consists of a high-voltage power supply, a high-voltage voltmeter, a measuring circuit, a discharge quantity calibrator, a dual-pulse generator, and, if necessary, a terminating resistor. It consists of anti-reflection or anti-reflection suppressors, etc. The noise level of all components of the test equipment should be low enough to achieve the required sensitivity. Note. High voltage is rarely measured using a high voltage voltmeter; a voltage divider is usually used instead. 4.1.2 High-voltage power supply A test transformer or a series resonant device should be used to generate the test voltage. Regardless of the test equipment used, the test power supply should meet the requirements. The voltage and capacitance current required for the test are met. The test power supply should be an AC power supply with a frequency of 45Hz~55Hz, and the test voltage waveform should be an approximate sine wave with two identical half-waves. The ratio of peak value to root mean square (RMS) value should be 2 ± 0.05. If the test cannot be conducted using the aforementioned frequency of the test power supply due to the cable length being too long, the supplier and the buyer shall agree to use a frequency not lower than [the specified frequency]. The test was conducted using a 10Hz AC voltage.

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