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JJG 126-2022 English PDF

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JJG 126-2022: Power Frequency A. C. Electrical Quantities Measuring Transducers
Status: Valid

JJG 126: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
JJG 126-2022English909 Add to Cart 6 days [Need to translate] Power Frequency A. C. Electrical Quantities Measuring Transducers Valid JJG 126-2022
JJG 126-1995English1279 Add to Cart 6 days [Need to translate] Measuring transducers for converting a.c. electrical quantities into d.c. electrical quantities Obsolete JJG 126-1995
JJG 126-1991EnglishRFQ ASK 3 days [Need to translate] (Level oscillator verification procedures) Obsolete JJG 126-1991

Standard similar to JJG 126-2022

JJG 249   JJG 404   JJG 134   

Basic data

Standard ID JJG 126-2022 (JJG126-2022)
Description (Translated English) Power Frequency A. C. Electrical Quantities Measuring Transducers
Sector / Industry Metrology & Measurement Industry Standard
Word Count Estimation 41,440
Date of Issue 2022-09-26
Date of Implementation 2023-03-26
Issuing agency(ies) State Administration for Market Regulation

JJG 126-2022: Power Frequency A. C. Electrical Quantities Measuring Transducers

---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.
Power Frequency ACE Electrical Quantities Measuring Transducers National Metrology Verification Regulations of the People's Republic of China Power Frequency AC Power Measuring Transmitter Released on 2022-09-26 2023-03-26 Implementation Released by the State Administration for Market Regulation Power Frequency AC Power Measuring Transmitter Verification Regulations Replace JJG 126-1995 Responsible unit. National Electromagnetic Metrology Technical Committee Main drafting unit. Tianjin Academy of Metrology Supervision and Testing Science Electronic Instrument Laboratory, Tianjin Academy of Metrology Supervision and Testing Participating in the drafting unit. State Grid Tianjin Electric Power Company Xinjiang Uygur Autonomous Region Institute of Metrology and Testing This regulation entrusts the National Electromagnetic Metrology Technical Committee to be responsible for interpretation The main drafters of this regulation. Zhang Yimeng (Tianjin Academy of Metrology Supervision and Testing) Liu Yu (Electronic Instrument Laboratory, Tianjin Academy of Metrology Supervision and Testing) Guo Jingtao (Tianjin Metrology Supervision and Testing Research Institute) Participating drafters. Zhao Xinming (Tianjin Metrology Supervision and Testing Research Institute) Li Ye (State Grid Tianjin Electric Power Company) Ni Dazhi (Xinjiang Uygur Autonomous Region Institute of Metrology and Testing) Wang Xiaowen (Xinjiang Uygur Autonomous Region Institute of Metrology and Testing)

Table of contents

Introduction (Ⅱ) 1 Scope(1) 2 References(1) 3 Terms and units of measurement(1) 4 Overview(1) 5 Metrological performance requirements (2) 5.1 Basic error(2) 5.2 Changes in power transmitter reference error caused by unbalanced current (2) 5.3 Effects of self-heating (2) 5.4 Ripple content(2) 5.5 Allowable error change (2) 5.6 Response time(3) 6 General technical requirements (3) 6.1 Appearance(3) 6.2 Power frequency withstand voltage test and insulation resistance test (3) 7 Measuring Instrument Control(3) 7.1 Test conditions (3) 7.2 Verification items (6) 7.3 Verification method (6) 7.4 Processing of test results (19) 7.5 Verification cycle (19) Appendix A Transmitter Theoretical Output Value Calculation Formula (20) Appendix B Verification Original Record Format (21) Appendix C Inspection Certificate/Inner Page Format of Inspection Result Notification (Page 2) (27) Appendix D Test Certificate/Test Result Notice Test Result Page Sample (Page 3) (28)

Introduction

JJF1002-2010 "Rules for Compilation of National Metrology Verification Regulations", JJF1001-2011 "General Metrology Terminology and "Definition" and JJF1059.1-2012 "Assessment and Expression of Measurement Uncertainty" together constitute the supporting work for the formulation and revision of this regulation. The basic series of specifications for the work. This regulation is based on IEC 60688.2012 "Conversion of AC and DC power into analog or digital signals Electrical Measuring Transmitter" was revised. This regulation replaces JJG 126-1995 "Conversion of AC power to DC power for electricians Measuring Transmitters". Compared with JJG 126-1995, the main technical changes of this regulation are as follows except editorial modifications. ---The name of the regulation was changed from "Conversion of AC power to DC power for electrical engineering measurement transmitter" to "Power frequency AC power Measuring Transmitter", the applicable frequency range is specified as (45~65)Hz; ---The scope of application is extended to measuring transmitters whose output is DC analog signal or digital signal; ---Three-phase active power transmitter and reactive power transmitter use three-phase standard power meter for verification; --- Increase the verification method using the standard power source; --- Delete the additional B-phase current type unbalanced reactive power transmitter, cross current type unbalanced reactive power transformer The verification method of the transmitter and the unbalanced reactive power transmitter based on the principle of 90° phase shift. The release status of previous versions of this regulation. ---JJG 126-1995. Verification Regulations for Power Frequency AC Electricity Measuring Transmitter

1 Scope

This regulation is suitable for converting AC parameters into DC analog signals or Initial verification, subsequent verification and in-use inspection of measuring transmitters for digital signals.

2 References

This procedure references the following documents. JJF1094 Characteristic evaluation of measuring instruments GB/T 13850-1998 Electrical measuring transmitter for converting alternating current into analog or digital signal GB/T 17215.352-2009 Special requirements for alternating current measuring equipment Part 52.Symbols IEC 60050-300.2001 International Electrotechnical Vocabulary for Electrical and Electronic Measuring and Measuring Instruments (International struments) IEC 60688.2012 Electrical measurement and transmission for converting alternating current and direct current into analog or digital signals For dated references, only the dated version applies to this regulation. All undated citations document, its latest version (including all amendments) applies to this regulation.

3 Terminology and units of measurement

transducer AC voltage, AC current, active power, reactive power, frequency, phase angle, power factor, etc. A measurement transmitter that converts galvanic parameters into DC analog signals or digital signals. 3.2 response time response time From the moment of applying the measurand that changes according to the regulations, until the output signal reaches and remains at the final stable value or at this value Time within the specified range for the center.

4 Overview

The power frequency AC power measurement transmitter (hereinafter referred to as the transmitter) is a kind of AC power (voltage, current) to be measured. flow, active power, reactive power, frequency, phase, power factor, etc.) into DC analog or digital signals s installation. It generally consists of three parts. signal acquisition circuit, signal processing and conversion circuit, and signal output circuit. The schematic diagram of the transmitter is shown in Figure 1.

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