GB/T 13850-2025Electrical measuring transducers for converting AC and DC electrical quantities to analogue or digital signals (English PDF)

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, 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 epsilon;

---The symbol "-" in Table 1 should be changed to "sqrt";

---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).

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.