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GB/T 13850: Evolution and historical versions
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| GB/T 13850-2025 | English | RFQ |
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Electrical measuring transducers for converting AC and DC electrical quantities to analogue or digital signals
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GB/T 13850-2025
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| GB/T 13850-1998 | English | 879 |
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Electrical measuring transducers for converting a.c electrical quantities to analogue or digital singals
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GB/T 13850-1998
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| GB/T 13850.1-1992 | English | 719 |
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Electrical measuring transducers for converting a. c. electrical quantities into d. c. electrical quantities Part 1: General purpose transducers
| Obsolete |
GB/T 13850.1-1992
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Standard similar to GB/T 13850-2025
GB/T 50034 GB/T 50082 Basic data
| Standard ID | GB/T 13850-2025 (GB/T13850-2025) |
| Description (Translated English) | Electrical measuring transducers for converting AC and DC electrical quantities to analogue or digital signals |
| Sector / Industry | National Standard (Recommended) |
| Classification of Chinese Standard | N22 |
| Classification of International Standard | 17.220.20 |
| Word Count Estimation | 110,124 |
| Date of Issue | 2025-10-05 |
| Date of Implementation | 2026-05-01 |
| Older Standard (superseded by this standard) | GB/T 13850-1998 |
| Issuing agency(ies) | State Administration for Market Regulation and Standardization Administration of China |
GB/T 13850-2025: Electrical measuring transducers for converting AC and DC electrical quantities to analogue or digital signals
---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
Replaces GB/T 13850-1998
AC and DC electrical quantities are converted into analog signals or
Digital signal electrical measurement transmitter
(IEC 60688.2024, IDT)
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 VII
Introduction VIII
1.Scope 1
2 Normative References 2
3 Terms and Definitions
3.1 General Terminology 3
3.2 Terminology describing transmitters 4
3.3 Describe the transmitter using terminology based on the measured quantity. (6)
3.4 Terminology describing the transmitter based on the output load 7
3.5 Nominal value 7
3.6 Describe user-adjustable transmitter terminology 8
3.7 Influence Quantity and Reference Conditions 8
3.8 Errors and Changes 9
3.9 Accuracy, Accuracy Class, Class Indicators 9
3.10 Terminology related to primary measurement of transmitters 9
3.11 Terminology related to transmitter secondary output 10
4.Environmental conditions 11
5 rating 11
6.Design and structural requirements 11
6.1 General Requirements 11
6.2 Safety Requirements 12
6.3 EMC requirement 14
6.4 Climate Requirements 16
6.5 Mechanical Requirements 16
6.6 Functional Requirements 16
6.7 Marking Requirements 16
6.8 Document Requirements 16
7.Type testing 16
8.Routine Tests 16
Appendix A (Normative) TRD1 Requirement 17
A.1 Scope 17
A.2 Standard Reference 17
A.3 Terms and Definitions 17
A.4 Environmental Conditions 17
A.5 Rating 17
A.6 Design and structural requirements of TRD1 17
A.7 TRD1 Test 27
Appendix B (Normative) TRD2 requires 40
B.1 Scope 40
B.2 Normative references 40
B.3 Terms and Definitions 40
B.4 Environmental conditions 40
B.5 TRD2 rating 41
B.6 Design and structural requirements of TRD2 44
B.7 TRD2 Type Test 57
B.8 TRD2 Routine Test 77
Appendix C (Specifications) Interface Coding 78
C.1 General Requirements 78
C.2 Interface Connection Method 78
C.3 Transmitter rated output value coding 78
C.4 Transmitter Auxiliary Power Supply Encoding 80
C.5 Transmitter transfer function curve encoding 81
C.6 Transmitter output interface complete code 82
Appendix D (Informative) Anti-aliasing Requirements 84
Appendix E (Normative) Harmonic and Low-Frequency Measurement Requirements 86
E.1 General Requirements 86
E.2 Accuracy Class Extension WBm0 Requirement 86
E.3 Accuracy Class Extension WBm1 requires 86
E.4 Accuracy Class Extension WBm2 Requirement 87
E.5 Accuracy Class Extension WBm3 Requirement 87
Appendix F (Normative) Terminal Markings for TRD2 89
F.1 Terminal markings for monitoring AC current TRD2 89
F.2 Terminal markings for monitoring voltage TRD2 89
Appendix G (Informative) Guidelines for Cables, Busbars and Bare Conductors in the Installation 91
G.1 Cable Insulation 91
G.2 Temperature of cables and busbars 91
Appendix H (Informative) Overvoltage Category and Measurement Category Related Guidance 92
H.1 Concept of Overvoltage Categories 92
H.2 IEC 60664-1 standard for the method of TRD2 primary circuit 92
H.3 IEC 61010 Method 93 for TRD2 Primary Circuit
H.4 TRD2 Secondary Circuit Handling Method 94
Appendix I (Informative) Examples of clamping devices and the relationship between clamping units and connecting devices 95
I.1 Clamping device 95 in the connecting device
I.2 Example of a clamping device 95
References 100
Figure 1.Example 11 of Transmitter (TRD) structure
Figure A.1 Transfer function curve A 22
Figure A.2 Transfer function curve B 22
Figure A.3 Transfer function curve C 23
Figure A.4 Transfer function curve D 23
Figure A.5 Transfer function curve E 23
Figure B.1 Relationship between air temperature and relative humidity 44
Figure B.2, size 46
Figure B.3 Accuracy limits of TRD2-IAC(a) and TRD2-IDC(b) 51
Figure B.4 Definition of the angle between the primary conductor and the device 54
Figure B.5 Primary conductor position defined by position factor 54
Figure B.6 Type A and Type B gauges 64
Figure B.7 Bending test equipment 66
Figure B.8 Step response time measurement 71
Figure B.9 Temperature Cycling Accuracy Test 72
Figure B.10 Test setup. used to evaluate the influence of magnetic fields from other phases 73
Figure B.11 Accuracy Measurement Test Apparatus 74
Figure D.1 Example of a digital data acquisition system 84
Figure D.2 Frequency response with accuracy class 1.0 (fr=60Hz, fs=4800Hz) 85
Figure I.1 Clamping device 95 in the connecting device
Figure I.2 Screw-type clamping device 95
Figure I.3 Column clamping device 96
Figure I.4 Stud-type clamping device 97
Figure I.5 Saddle-type clamping device 98
Figure I.6 Wire-ear type clamping device 98
Figure I.7 Shell-type clamping device 99
Table 1.Classification of transmitters according to minimum functional requirements. 12
Table 2 Port Definitions 15
Table 3 Performance Criteria for EMC Immunity Test 15
Table A.1 Group 17
Table A.2 Relationship between inherent error limit (expressed as a percentage of the benchmark value) and grade index 18
Table A.3 Preprocessing conditions 19
Table A.4 Reference conditions and permissible deviations during testing for influencing factors 19
Table A.5 Reference conditions related to the measurand 20
Table A.6 Reference conditions and nominal application range marking methods for temperature (Example 26)
Table A.7 Transmitter marking conforms to 26
Table A.8 Permissible Changes Due to AC Auxiliary Power Supply 28
Table A.9 Permissible Changes Due to DC Auxiliary Power Supply 29
Table A.10 Allowable variable caused by auxiliary power supply frequency 29
Table A.11 Changes caused by ambient temperature 30
Table A.12 Permissible Changes Due to Input Frequency 31
Table A.13 Permissible Changes Due to Input Voltage 31
Table A.14 Permissible Changes Due to Input Current 32
Table A.15 Permissible Changes Due to Power Factor 32
Table A.16 Permissible Changes Due to Output Load 33
Table A.17 Permissible Changes Due to Input Waveform Distortion 34
Table A.18 Permissible Changes Caused by External Magnetic Fields 34
Table A.19 Changes caused by unbalanced current 35
Table A.20 Permissible changes caused by the interaction between measuring elements 36
Table A.21 Permissible Changes Due to Self-Heating 36
Table A.22 Permissible Changes Due to Common-Mode Interference 37
Table A.23 Permissible Changes Due to Cross-Mode Interference 38
Table B.1 Environmental Condition Parameters 40
Table B.2 Preferred rated loads for TRD2 with AC or DC voltage or frequency output 42
Table B.3 Rated Load of TRD2 for AC or DC Current Output 43
Table B.4 Rated temperature of TRD2.43°C
Table B.5 Rated Humidity Rating of TRD2 44
Table B.6 Examples of Equipment Wiring Terminals for Copper Conductor Connections 45
Table B.7 Approximate Relationship between Nominal Cross-sectional Area of Circular Copper Conductors and mm² and AWG/kcmil Dimensions 46
Table B.8 Minimum value of maximum cross-section for conductors not exceeding 400A (inclusive) 47
Table B.9 Minimum value of maximum cross-section for conductors with a current rating of 400A to 800A (inclusive). 48
Table B.10 Minimum value of maximum cross-sectional area for copper busbars with current ranging from 400A to 3150A (inclusive). 49
Table B.11 Relative and Phase Error Limits of TRD2-IAC (50°C)
Table B.12 Scale error limit of TRD2-IDC 50
Table B.13 Scale error limit of TRD2-UAC 52
Table B.14 Scale Error Limits of TRD2-UDC 52
Table B.15 Positional Limits of Primary Conductors Relative to Equipment 53
Table B.16 RJ45 Connector Pin Arrangement 55
Table B.17 Temperature Test 59
Table B.18 Tightening torque 60 for verifying the mechanical strength of screw-type terminals
Table B.19 Maximum Conductor Cross Section and Corresponding Specifications 61
Table B.20 Relationship between conductor cross-section and diameter 62
Table B.21 Test values for bending and pull-out tests of round copper conductors 65
Table B.22 Test values for flat copper conductor pull-out test 66
Table B.23 Copper Wire Testing (Applicable to test currents up to 400A, including 400A) 67
Table B.24 Copper Wire Testing (Applicable to test currents exceeding 400A and up to 800A, including 800A) 68
Table B.25 Copper Conductor Testing (Applicable to test currents exceeding 400A and up to 3150A, including 800A) 68
Table B.26 Load Point 69 for Inherent Error Test
Table C.1 Interface Code 78
Table C.2 AC Voltage RMS Output Rating 78
Table C.3 Rated DC Voltage Output Value 79
Table C.4 DC Voltage Rated Output Range 79
Table C.5 Rated AC RMS Values (Current Output Less Than 1A) 79
Table C.6 Rated Output Range of DC Current (80°C)
Table C.7 Rated output frequency 80
Table C.8 Rated Output Value of Pulse Density 80
Table C.9 Transmitter power supply codes provided by the measuring instrument via the connector 81
Table C.10 Transmitter External Power Supply Code 81
Table C.11 TRD1 Transfer Function Curve Encoding 81
Table C.12 Interface Fully Encoded Output Transmitter 82
Table C.13 Examples of Interface Code and the Most Commonly Used Interface Code 82
Table D.1 Anti-aliasing filter 84
Table E.1 Harmonic Accuracy Class Extension WBm0 Error Limit 86
Table E.2 Harmonic Accuracy Class Extension WBm1 Error Limit 87
Table E.3 Harmonic Accuracy Class Extension WBm2 Error Limit 87
Table E.4 Harmonic Accuracy Class Extension WBm3 Error Limit 88
Table F.1 Terminal markings for monitoring current TRD2 89
Table F.2 Terminal markings for monitoring voltage TRD2 89
Table H.1 Clearance 92 specified in IEC 60664-1.2020
Table H.2 Creepage distance specified in GB/T 16935.1-2023 93
Table H.3 Gap 93 specified in GB/T 42125.6-2025
Table H.4 Creepage distance specified in GB/T 42125.6-2025 94
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 supersedes GB/T 13850-1998 "Electrical measuring transmitters for converting AC electrical quantities into analog or digital signals", and is consistent with...
Compared with GB/T 13850-1998, apart from structural adjustments and editorial changes, the main technical changes are as follows.
a) Added features for DC transmitters, transmitters specific to low-voltage monitoring applications, harmonic and total harmonic distortion, apparent power, and digital compatibility.
The applicable scope of the transmitter (see Chapter 1);
b) The terminology definitions for electrical measurement transmitters have been changed (see 3.2.1, 3.1.1 of the.1998 edition);
c) Increased DC power (see 3.1.6);
d) Increased security requirements (see 6.2);
e) Added EMC requirements (see 6.3);
f) Interface coding has been added to facilitate end-user selection (see Appendix C).
This document is equivalent to IEC 60688.2024 "Electrical measuring transmitters for converting AC and DC electrical quantities into analog or digital signals".
The following minimal editorial changes have been made to this document.
---Add formula number (1) to terminology 3.8.2 and add an explanation of the relative error ε;
---The symbol "■" in Table 1 should be changed to "√";
---A.6.6.3.2 Add the introductory phrase "The DC power supply shall meet the following requirements";
---Add "Accuracy Grade E" to Formula (A.1);
---In A.7.3.3, formula numbers (A.2) and formula (A.3) are added, and the change is represented by "V";
---The chapter numbers in A.7.19.1.1~A.7.19.1.4 have been changed to "A.7.19.1~A.7.19.4";
---Appendix B includes formula numbers (B.3) and (B.4), along with explanations of the symbols used in the formulas;
---Add formula numbers (D.1) and (D.2) to Appendix D. The first frequency in formula (D.1) mapped to fs is denoted as falias.
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 Zhejiang Chint Instruments Co., Ltd.
Instrument Co., Ltd., Zhejiang Hanpu Electric Technology Co., Ltd., Kelun International Technology Co., Ltd., Heilongjiang Provincial Electrical Instrument and Meter Engineering Co., Ltd.
Technology Research Center Co., Ltd., Zhejiang Hengye Electronics Co., Ltd., Yantai Dongfang Weiston Electric Co., Ltd., Guizhou Power Grid Co., Ltd.
Ren Company Measurement Center, Huali Technology Co., Ltd., Jiangsu Sifir Electric Co., Ltd., Shenzhen Jiangji Industrial Co., Ltd.
Shanghai Liqian Electric Technology Co., Ltd., Qingdao Tuowei Technology Co., Ltd., Qingdao Qiancheng Technology Co., Ltd., China Southern Power Grid Co., Ltd.
Responsible companies. Liuzhou Bureau of Ultra-High Voltage Transmission Company, Ningbo Canaan Intelligent Electric Co., Ltd., Zhejiang Chengtai Technology Co., Ltd., Shandong
Yuanxing Electronics Co., Ltd.
The main drafters of this document are. Bai Jingfen, Guo Chuang, Feng Xueli, Yang Yubo, Wang Xiang, Wang Jianyi, Wang Huiwu, Chen Wenxin, Hu Meng, and Song Hu.
Li Pengcheng, Meng Jing, Zeng Shitu, Wang Xiaojian, Li Hongwei, Zhang Chuang, Sun Shijie, Jin Zhaoan, Diao Ruipeng, Zhang Haifeng, Shen Diqiu, Zhang Enyou, Liu Gengxing
Wang Yongping.
The release history of this document and the document it replaces is as follows.
---First published in.1992 as GB/T 13850.1-1992 and GB/T 13850.2-1992;
---First revised in.1998 as GB/T 13850-1998;
---This is the second revision.
Introduction
Energy distribution systems need to ensure energy efficiency, availability, and network performance to address the following challenges.
● To meet the requirements of sustainable development, energy measurement is essential for identifying energy-saving sources and improving energy efficiency in manufacturing, commercial establishments, and public services.
Necessary conditions for ability;
● Adapt to technological advancements (electronic loads, electronic measurement methods, etc.);
● Addressing end-users' needs in power management (cost savings, compliance with building codes, etc.);
● Ensure the security and continuity of service;
● Adapt to the development of installation standards;
● Meets the needs of new applications in DC systems (photovoltaics, electric vehicles, DC power distribution, etc.).
Monitoring the power levels of the internal network helps address these challenges; to establish such monitoring, transmitters are needed.
● Measure different types of electrical charge;
● Converts AC and DC electrical quantities into analog or digital signals;
● It can be used in conjunction with measuring equipment to monitor and analyze electrical power.
AC and DC electrical quantities are converted into analog signals or
Digital signal electrical measurement transmitter
1 Scope
This document specifies the technical requirements for measuring transmitters with electrical input and output, used for measuring AC or DC electrical parameters. Output
The signal may be an analog signal or a digital signal.
This document applies to measuring transmitters that convert the following electrical quantities into output signals.
---Current;
---Voltage;
---Active power;
---Reactive power;
---Power factor;
---Phase angle;
---frequency;
---Harmonic or total harmonic distortion;
--- Apparent power;
---DC power.
The above electrical parameters include AC and/or DC components.
This document applies to the following situations.
a) The fundamental frequency of the input quantity is between 0Hz and 1500Hz;
b) Electrical measurement transmitters that are part of an electrical or non-electrical measurement system;
c) Suitable for transmitters in a variety of applications, such as telemetry and process control, as well as many specific environments.
This document does not apply to.
---Instrument transformers conforming to IEC 61869 (all parts);
---Transmitters for industrial process applications conforming to IEC 60770 (all parts);
---Power measurement and monitoring equipment (PMD) conforming to IEC 61557-12;
---Electricity meters conforming to IEC 62053 (all parts);
---Handheld sensor;
--- Residual current monitoring equipment (RCM) conforming to IEC 62020-1;
---Residual current sensing equipment conforming to IEC 62955 (RDC-DD);
---In-cable control and protection devices (IC-CPD) according to IEC 62752;
---Modular Residual Current Devices (MRCDs) in Annex M of IEC 60947-2.2024;
Within the measurement range, the output signal is a function of the measured value. An auxiliary power supply may be required.
The purpose of this document is.
---Terminology and definitions related to transmitters, primarily used in industrial applications;
---A unified test method for evaluating transmitter performance;
---Specific accuracy limits and output values for transmitters.