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Electrictity metering equipment(DC) - Part 1: General requirements
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GB/T 33708.1-2025
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| GB/T 33708-2017 | English | 175 |
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Static meter for direct current energy
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Standard similar to GB/T 33708.1-2025 GB/T 33708.2 GB/T 33708 GB/T 50034 Basic data | Standard ID | GB/T 33708.1-2025 (GB/T33708.1-2025) | | Description (Translated English) | Electrictity metering equipment(DC) - Part 1: General requirements | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | N22 | | Classification of International Standard | 17.220.20 | | Word Count Estimation | 70,796 | | Date of Issue | 2025-10-05 | | Date of Implementation | 2026-05-01 | | Issuing agency(ies) | State Administration for Market Regulation and Standardization Administration of China | GB/T 33708.1-2025: Electrictity metering equipment(DC) - Part 1: General requirements---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.
ICS 17.220.20
CCSN22
National Standards of the People's Republic of China
DC power measurement equipment - Part 1.General requirements
Published on 2025-10-05
Implemented on May 1, 2026
State Administration for Market Regulation
The State Administration for Standardization issued a statement.
Table of contents
Preface V
Introduction VI
1.Scope 1
2 Normative References 1
3 Terms and Definitions
3.1 General Definitions
3.2 Instrument Port Definitions 4
3.3 Definitions related to measurement 5
4.Nominal power capacity 6.
4.1 Voltage 6
4.2 Current 7
4.3 Power Consumption 8
5.Structural Requirements 8.
5.1 General Requirements 8
5.2 Mechanical Testing 9
5.3 Window 9
5.4 Terminals, terminal blocks, and protective conductor terminals 9
5.5 Seal 10
5.6 Measurement value displayed. 10
5.7 Measurement value storage 11
5.8 Pulse Output 11
5.9 Electrical pulse input 13
5.10 Auxiliary power supply 13
6.Instrument Identification and Documentation 14
6.1 Instrument accuracy class marking 14
6.2 Instrument Marking 14
6.3 Wiring Diagram and Terminal Labeling 18
6.4 Symbol 18
6.5 Document 20
7.Metrological performance requirements and tests 20
7.1 General Test Conditions 20
7.2 Accuracy Verification Method 21
7.3 Measurement uncertainty 22
7.4 Instrument constant test 22
7.5 Initial Start-up Test 22
7.6 No-load test 23
7.7 Starting Current Test 23
7.8 Repeatability Test 23
7.9 Basic error 24
7.10 Error offset limit caused by influence quantity 24
7.11 Timing accuracy 24
8.Climate and environmental requirements 24
8.1 General Requirements 24
8.2 Environmental Conditions 24
8.3 Climate and Environmental Impact Test 25
8.4 Durability 26
9.External Influence and the Impact of Disturbance 26
9.1 General Requirements 26
9.2 Acceptance Criteria 28
9.3 Electromagnetic Compatibility (EMC) 29
9.4 Tests against other influences 37
10 Safety Requirements and Tests 40
10.1 Protection against mechanical hazards 40
10.2 Resistance to mechanical stress (spring hammer test) 40
10.3 Preventing the spread of flames 40
10.4 Instrument temperature limits and heat resistance 40°C
10.5 Dustproof and waterproof 40
10.6 Clearance and creepage distance 40
10.7 Electrical safety requirements 41
11.Metrological performance protection 42
12 Type Tests 42
12.1 Test Conditions 42
12.2 Type Test Report 42
Appendix A (Normative) Optical Test Output 43
Appendix B (Normative) Class A and Class B Electrical Pulses 44
B.1 Electrical performance of pulse output 44
B.2 Pulse output waveform 44
B.3 Pulse Output Test 45
B.4 Pulse Input Test 45
Appendix C (Normative) Electrical Pulses for Special Applications and Long-Distance Transmission conforming to GB/T 3369.1-2008 47
C.1 Specified operating conditions and output pulse waveform 47
C.2 Pulse Output Test 48
C.3 Pulse Input Test 49
Appendix D (Informative) Instrument Symbols and Marks 50
Appendix E (Normative) Electromagnets for Testing the Influence of Externally Generated Magnetic Fields 54
E.1 Permanent magnet 54 used for testing the effects of external constant magnetic fields
E.2 An electromagnet used for testing the effects of an external constant magnetic field, with a magnetomotive force of 1000 ampere-turns (see Figure E.1) 54
Appendix F (Informative) Explanation of Applicable Instrument Types 56
F.1 Explanation of "Polar" 56
F.2 Symmetrical Unipolar 56
F.3 Asymmetric Monopole 56
F.4 Bipolar 57
Appendix G (Informative) Trial Plan - Recommended Trial Sequence 58
Appendix H (Normative) Electrical Safety Test Procedures 61
References 62
Figure A.1 Experimental layout for optical test output 43
Figure A.2 Waveform of the light test output 43
Figure B.1 Physical interface for electrical pulse output 44
Figure B.2 Electrical pulse output waveform 45
Figure B.3 Pulse output test layout 45
Figure B.4 Pulse Input Test Layout 46
Figure C.1 Output pulse waveform 48
Figure C.2 Pulse output test layout 48
Figure C.3 Pulse Input Test Layout 49
Figure E.1 shows an electromagnet used in an experiment to test the effects of an external constant magnetic field, with a magnetomotive force of 1000 ampere-turns (AJ).
Figure F.1 Schematic diagram of a symmetrical monopole 56
Figure F.2 Schematic diagram of an asymmetric monopole 57
Figure F.3 Schematic diagram of a bipolar circuit 57
Figure H.1 Electrical Safety Test Flowchart 61
Table 1 Nominal Voltage 7
Table 2 Voltage Range 7
Table 3 Nominal Current Values 7
Table 4 Current Range 8
Table 5 Identification and Documentation Requirements 15
Table 6 Reference Conditions 20
Table 7 Test points 24 of repeatability tests
Table 8 Temperature Range 24
Table 9 Other Climatic Conditions 25
Table 10 Summary of Immunity Tests for Influence Quantities 27
Table 11 Summary of Interference Immunity Tests 28
Table 12 Acceptance Criteria 28
Table 13 AC Voltage Sag and Short Interruption Tests 31
Table 14 DC Voltage Sag and Short Interruption Tests 31
Table 15 Surge immunity test voltage 35
Table 16 Evaluation of the main functions of the instrument under the influence of voltage changes 37
Table 17 Measurement points for superimposed AC current and voltage (38 points)
Table B.1 specifies the working conditions 44
Table B.2 Pulse Output Test 45
Table B.3 Pulse Input Test 46
Table C.1 specifies the working conditions 47
Table C.2 Pulse Output Test 49
Table C.3 Pulse Input Test 49
Table D.1 Voltage Markings (Example) 50
Table D.2 Current Markings (Example) 50
Table D.3 Symbols for Indicating Accuracy Classes and Instrument Constants (Example) 50
Table D.4 Measurement Unit Symbols (Example) 50
Table D.5 Symbols for Instruments Connected via Sensors (Examples) 51
Table D.6 Rate Function Symbols (Example) 51
Table D.7 shows the symbols used to identify information (example) 51
Table D.8 Basic Unit Symbols for Instruments (Example) 52
Table D.9 Auxiliary Device Symbols (Examples) 52
Table D.10 Symbols for Communication Ports (Examples) 53
Table G.1 Experimental Plan - Recommended Experimental Sequence Table 58
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 1 of GB/T 33708 "Dual Current Energy Measurement Equipment". GB/T 33708 has the following parts published.
---Part 1.General Requirements;
---Part 2.Indirect connection to static energy meters (Class 0.2, Class 0.5 and Class 1).
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 Machinery Industry Federation.
This document is under the jurisdiction of the National Technical Committee on Standardization of Electrical Instruments and Meters (SAC/TC104).
This document was drafted by. Harbin Electrical Instrument Research Institute Co., Ltd., China Electric Power Research Institute Co., Ltd., and Yantai Dongfang Weisi.
Dun Electric Co., Ltd., Zhejiang Ruibin Electronics Co., Ltd., Wasion Information Technology Co., Ltd., Zhejiang Provincial Academy of Quality Sciences, Henan Xu
Following the lead of [Company Name], Changsha Tianheng Measurement and Control Technology Co., Ltd., Zhejiang Wansheng Intelligent Technology Co., Ltd., and Zhejiang Chint Instruments Co., Ltd.
Limited Liability Company, China National Institute of Metrology, Shenzhen Kelun Electronics Technology Co., Ltd., Shenzhen Xinglong Technology Co., Ltd.
China Jiliang University, Juquan Microelectronics (Shanghai) Co., Ltd., China Southern Power Grid Science Research Institute Co., Ltd., and Delixi Group Instrumentation Co., Ltd.
Limited Liability Company, Heilongjiang Provincial Electrical Instruments and Meters Engineering Technology Research Center Co., Ltd., XJ Electric Co., Ltd., Zhejiang Hengye Electronics
Joint-stock limited company, Qingdao Dingxin Communication Co., Ltd., Shenzhen Aerospace Tairuijie Electronics Co., Ltd., Shenzhen Jiangji Industrial Co., Ltd.
Company, Wuxing Technology (Shenzhen) Co., Ltd., State Grid Anhui Electric Power Research Institute, Hangzhou Haixing Electric Power Technology Co., Ltd.
The company, Huali Technology Co., Ltd., Marketing Service Center of State Grid Anhui Electric Power Co., Ltd., and Marketing Department of State Grid Fujian Electric Power Co., Ltd.
Service Center, State Grid Chongqing Electric Power Company Marketing Service Center, State Grid Hebei Electric Power Co., Ltd. Metering Center, Shanghai Belling Co., Ltd.
Company, Marketing Service Center (Metering Center) of State Grid Shandong Electric Power Company, Marketing Service Center of State Grid Zhejiang Electric Power Company, Jiangsu Linyang
Energy Co., Ltd., Qingdao Qiancheng Technology Co., Ltd., Jiangsu Huapeng Intelligent Instrument Technology Co., Ltd., Ningbo Canaan Intelligent
Electric Co., Ltd., Beijing ABB Low Voltage Electrical Appliances Co., Ltd., China Southern Power Grid Digital Grid Group Co., Ltd., Hangzhou Juhua Technology Co., Ltd.
Limited Liability Company, Jiangsu Kaouwanhong Electronics Co., Ltd., Ningbo Taifengyuan Electric Co., Ltd., Henan Zhunhang Electronics Technology Co., Ltd., Yunnan Electric
Network Co., Ltd., Beijing Yubang Electric Power Technology Co., Ltd., Zhongnan Instrument Co., Ltd., Wuhan Shengfan Electronics Co., Ltd.
Zhejiang Chengtai Technology Co., Ltd., Hangzhou Xili Intelligent Technology Co., Ltd., Xi'an University of Electronic Science and Technology, Sichuan Zhongwei Energy Technology Co., Ltd.
Technology Co., Ltd., Jiangsu Liyang Electronic Instrument Co., Ltd., Zhejiang Songxia Instrument Co., Ltd., Shenzhen Hongjiali New Energy Co., Ltd., Zhejiang
Mailang Electric Co., Ltd.
The main drafters of this document are. Duan Xiaomeng, Luo Yurong, Zheng Jianzhong, Duan Yongxian, Meng Juan, Fu Peng, Chen Wenxin, Hong Tao, Liu Yadong, and Zhang Dengqing.
Niu Fuzhen, Zheng Liqun, Shao Haiming, Lin Fantao, Wang Yanglong, Liu Yongguang, Liu Yue, Huang Jianzhong, Ma Liang, Luo Yi, Xu Tao, Zhao Long, Qiu Rujia, Xia Taofang
Ji Aiqiong, Diao Ruipeng, Deng Caiyun, Hu Meng, Sun Shijie, Chen Huiyun, Zeng Shitu, Liu Xingzhi, Liu Si, Du Yan, Liu Libing, Dai Wenjun, Fan Zhen
Zheng Wenchang, Hou Qingquan, Dai Zhiyong, Li Guangqi, Yao Xingmao, Zhao Sixiang, Huang Changjiang, Peng Jianzhong, Zhu Kao, Zhang Leping, Wang Hongjian, Zhang Enyou
Shan Jiongxiang, Yuan Guojun, Yue Xu, Shen Xin, Zhou Deqin, Peng Wulin, Wang Wei, Wang Taofeng, Yang Xing, Pan Wentao, Jiang Xiaoguang, Xue Te, Li Zeqing, Li Qifan.
Introduction
GB/T 33708 "DC Power Measurement Equipment" aims to specify the general requirements, tests and test conditions for DC power measurement equipment.
GB/T 33708 is proposed to consist of the following parts.
---Part 1.General Requirements. The purpose is to specify the general requirements and related tests and type test conditions for DC energy meters.
---Part 2.Indirect Connection to Static Energy Meters (Class 0.2, 0.5, and 1). The purpose is to specify the requirements for newly manufactured meters with direct current...
Indirect access static DC power for measuring and controlling DC power in the network, with accuracy classes of 0.2, 0.5, and 1.
The type test requirements and test methods for the table.
---Part 3.Direct Connection to Static Energy Meters (Class 0.5 and Class 1). The purpose is to specify the requirements for newly manufactured meters for measuring energy in DC power grids.
Type test requirements for direct-connection static energy meters that measure and control DC power with accuracy classes of 0.5 and 1.
and its experimental methods.
---Part 4.Digital Static DC Energy Meters. The purpose is to specify the calculation methods for newly manufactured digital static DC energy meters.
Quantitative performance, influence quantity requirements, and type testing, etc.
This document is intended to be used in conjunction with other parts of GB/T 33708.
This document outlines the minimum test levels required to ensure proper instrument function under normal operating conditions; other requirements may apply to special application scenarios.
The testing level is agreed upon by the user and the manufacturer.
The technical requirements applicable to DC power measurement equipment in IEC 62052-11.2020 are extracted and combined.
Other general technical requirements are incorporated into this document.
DC power measurement equipment - Part 1.General requirements
1 Scope
This document specifies the general requirements and related tests, as well as type test conditions, for DC power measurement equipment (hereinafter referred to as "instruments").
The test includes functional requirements, mechanical requirements, electrical requirements, safety requirements, labeling requirements, and immunity to external influences such as electromagnetic and climatic environments.
Test methods and test conditions.
Note 1.For specific accuracy requirements and other special requirements of instruments of each accuracy class, see the Special Requirements section of GB/T 33708.
Note 2.For other general requirements, such as the metering methods and requirements for multi-energy and multi-rate meters, reliability, etc., please refer to GB/T 17215.241-2025 or
Relevant parts of GB/T 17215.9.
This document applies to.
---Instruments for measuring and controlling electrical energy in electrical networks with a voltage not exceeding 1500V;
Note 3.For instruments indirectly connected via a DC sensor (such as a voltage divider), if the sensor's rated input voltage is greater than 1500V, only the measuring device will be affected.
It is considered a low-voltage measuring device, but the combined device consisting of its DC sensor and measuring equipment is not considered a low-voltage measuring device.
---Except for the indicator display, all functional units (including additional modules) are encapsulated in the same case or form a separate case.
meter;
---Meters using integrated displays;
---Meters using separate indicator displays or without indicator displays;
---Instruments installed on matching sockets or racks;
---Instruments that provide additional functions besides power measurement are not covered in this document.
This document also applies to auxiliary input and output circuits, operating indicators, and test outputs of measuring equipment.
Note 4.For example. pulse input and output, control input and output, power test output.
This document also covers general requirements for accuracy testing, such as reference conditions, measurement repeatability, and measurement uncertainty.
This document does not apply to.
---Instruments with a nominal voltage exceeding 1500V;
---Electromechanical instruments;
---Portable instrument;
Note 5.Portable instruments refer to instruments that are not permanently connected.
---Instruments used in rail locomotives, vehicles, ships, and aircraft;
---Laboratory and instrument testing equipment;
---DC standard energy meter;
---Data interface for instrument registers;
---A matching socket or rack for mounting instruments;
--- Additional features provided in the instrument.
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.
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GB/T 33708.1-2025: Electrictity metering equipment(DC) - Part 1: General requirements
Status: Valid
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