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JJG 1177-2021 English PDF

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JJG 1177-2021: Harmonic Voltage Transformers
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Standard ID	Contents [version]	USD	STEP2	[PDF] delivered in	Standard Title (Description)	Status	PDF
JJG 1177-2021	English	509	Add to Cart	4 days [Need to translate]	Harmonic Voltage Transformers	Valid	JJG 1177-2021

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Standard similar to JJG 1177-2021

JJF 1234 JJF 1187 JJG 376 JJG 1180 JJG 1176 JJG 1168

Basic data

Standard ID	JJG 1177-2021 (JJG1177-2021)
Description (Translated English)	Harmonic Voltage Transformers
Sector / Industry	Metrology & Measurement Industry Standard
Classification of Chinese Standard	A55
Word Count Estimation	23,256
Issuing agency(ies)	State Administration for Market Regulation

JJG 1177-2021: Harmonic Voltage Transformers

---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.
(Harmonic voltage transformer verification regulation) People's Republic of China National Metrological Verification Regulations Harmonic voltage transformer Published on 2021-10-18 2022-04-18 Implementation Released by the State Administration for Market Regulation Harmonic Voltage Transformer Verification Regulations Focal Point. National Electromagnetic Metrology Technical Committee High Voltage Metrology Sub-Technical Committee Main drafting unit. National High Voltage Metering Station Participating in the drafting unit. State Grid Corporation of China State Grid Jiangsu Electric Power Co., Ltd. Shanghai Institute of Metrology and Testing Technology State Grid Inner Mongolia Eastern Electric Power Co., Ltd. Yunnan Power Grid Co., Ltd. Electric Power Research Institute This regulation is entrusted to the National Electromagnetic Metrology Technical Committee High Voltage Metrology Sub-Technical Committee to be responsible for the interpretation The main drafters of this regulation. Jiang Chunyang (National High Voltage Metering Station) Yin Xiaodong (National High Voltage Metering Station) Participating drafters. Peng Chuning (State Grid Corporation of China) Fan Jie (State Grid Jiangsu Electric Power Co., Ltd.) Pan Yang (Shanghai Institute of Metrology and Testing Technology) Xie Hongwei (State Grid Inner Mongolia Eastern Electric Power Co., Ltd.) Zhu Mengmeng (Electric Power Research Institute of Yunnan Power Grid Co., Ltd.)

content

Introduction (Ⅱ) 1 Scope(1) 2 References (1) 3 Terms and Definitions(1) 4 Overview(2) 5 Measurement performance requirements (2) 5.1 Accuracy classes and error limits(2) 5.2 Stability(3) 5.3 Influence of harmonics on fundamental wave(3) 6 General technical requirements (3) 6.1 Appearance(3) 6.2 Insulation resistance(3) 6.3 Power frequency withstand voltage (3) 6.4 Winding Polarity Requirements(3) 7 Measuring Instrument Control(3) 7.1 Verification Conditions (3) 7.2 Measurement standards and supporting equipment for verification (3) 7.3 Verification items (4) 7.4 Verification method (5) 7.5 Processing of Verification Results (7) 7.6 Verification Period(8) Appendix A Verification Original Record Format (9) Appendix B Verification Certificate/Inner Page Format of Verification Result Notification (13) Appendix C Verification Certificate/Verification Result Notification Verification Result Page Format (14)

Introduction

JJF1001-2011 "General Metrology Terms and Definitions", JJF1059.1-2012 "Measurement Uncertainty Evaluation and "Representation" and JJF1002-2010 "Rules for the Compilation of National Metrological Verification Regulations" together constitute the basis for supporting this regulation Series Specifications. This specification refers to GB/T 14549 "Power Quality Harmonics of Public Grid", GB/T 20840.1-2010 "Transformer Part 1.General Technical Requirements", GB/T 20840.3-2013 "Transformer Part 3.Electrical Supplementary Technical Requirements for Magnetic Voltage Transformers", JJG 314-2010 "Measurement Voltage Transformers" and JJG 1021 "Power Transformer" and other technical documents were formulated. This regulation is published for the first time. Harmonic Voltage Transformer Verification Regulations

1 Scope

This regulation applies to the rated fundamental wave (frequency is 50Hz or 60Hz) installed in the power system of 6kV and above Electromagnetic harmonics with voltage not higher than 110kV, total harmonic voltage not higher than 10kV, harmonic order up to 50th harmonic Initial verification, subsequent verification and in-use inspection of wave voltage transformers. Below 6kV can refer to this regulation. This regulation does not apply to harmonic voltage transformers whose secondary output is digital signal.

2 Reference documents

This procedure cites the following documents. JJG 314-2010 Voltage transformer for measurement JJG 1021 Power Transformer GB/T 14549 Power Quality Harmonics of Public Grid GB/T 20840.1-2010 Transformer Part 1.General Technical Requirements GB/T 20840.3-2013 Transformers Part 3.Supplementary technical requirements for electromagnetic voltage transformers For dated citations, only the dated version applies to this Regulation; for undated citations The latest version (including all amendments) applies to this regulation.

3 Terms and Definitions

GB/T 20840.1-2010, GB/T 20840.3-2013 and the following terms and definitions are applicable to this protocol. A voltage transformer capable of transforming a primary voltage containing harmonic components into a secondary voltage proportionally. The Fourier series decomposition of the periodic AC quantity is carried out, and the components with the same frequency as the power frequency are obtained. [GB/T 14549-1993, term 3.3] 3.3 harmonic(component) Perform Fourier series decomposition on the periodic alternating current to obtain components whose frequency is greater than 1 integer multiple of the fundamental frequency. [GB/T 14549-1993, term 3.4] 3.4 harmonic order(h) harmonicorder(h) Integer ratio of harmonic frequency to fundamental frequency. [GB/T 14549-1993, term 3.5] 3.5 Harmonic content ratio (HR) The root mean square value Uh of the h-th harmonic component and the root mean square value U1 of the fundamental wave component contained in the periodic alternating current ratio (expressed as a percentage). The h-th harmonic voltage content rate is expressed in HRUh.

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