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JJG 1176-2021 English PDF

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US$469.00 · In stock
Delivery: <= 4 days. True-PDF full-copy in English will be manually translated and delivered via email.
JJG 1176-2021: Harmonic Current Transformers
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
JJG 1176-2021	469	Add to Cart	4 days	Harmonic Current Transformers	Valid

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Basic data

Standard ID: JJG 1176-2021 (JJG1176-2021)
Description (Translated English): Harmonic Current Transformers
Sector / Industry: Metrology & Measurement Industry Standard
Classification of Chinese Standard: A55
Word Count Estimation: 21,247
Issuing agency(ies): State Administration for Market Regulation

JJG 1176-2021: Harmonic Current 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 current transformer verification regulations) People's Republic of China National Metrological Verification Regulations Harmonic Current Transformer Published on 2021-10-18 2022-04-18 Implementation Released by the State Administration for Market Regulation Harmonic Current Transformer Verification Regulations Focal Point. National Electromagnetic Metrology Technical Committee High Voltage Metrology Sub-Technical Committee Main drafting unit. National High Voltage Metering Station China Electric Power Research Institute Co., Ltd. Tsinghua University Participating in the drafting unit. China Institute of Metrology Xuji Group Co., Ltd. State Grid Shaanxi Electric Power Company Electric Power Research Institute Wuhan Pandian Technology Co., Ltd. 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. Li He (National High Voltage Metering Station) Yue Changxi (China Electric Power Research Institute Co., Ltd.) Zhao Wei (Tsinghua University) Participating drafters. Wang Jiafu (China Institute of Metrology) Tian Zhiguo (Xuji Group Co., Ltd.) Song Xiaolin (State Grid Shaanxi Electric Power Company Electric Power Research Institute) Sun Jun (Wuhan Pandian Technology 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 Magnetic Saturation Margin(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 (4) 7.5 Processing of Verification Results (6) 7.6 Verification Period(6) Appendix A Verification Original Record Format (7) Appendix B Verification Certificate/Inner Page Format of Verification Result Notification (11) Appendix C Verification Certificate/Verification Result Notification Verification Result Page Format (12)

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 14549-1993 "Power Quality Harmonics of Public Grid", GB/T 20840.1- 2010 "Transformer Part 1.General Technical Requirements", GB/T 20840.2-2014 "Transformer Part 2" Points. Supplementary Technical Requirements for Current Transformers", JJG 313-2010 "Current Transformers for Measurement" and JJG 1021 "Power Transformer" and other technical documents. This regulation is published for the first time. Harmonic Current 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 The current is not higher than 3000A, the total harmonic current is not higher than 600A, and the harmonic order is up to the 50th harmonic. Initial verification, subsequent verification and in-use inspection of wave current transformers. Below 6kV can refer to this regulation. This regulation does not apply to harmonic current transformers whose secondary output is digital signal.

2 Reference documents

This procedure cites the following documents. JJG 313-2010 Current transformer for measurement JJG 1021 Power Transformer GB/T 14549-1993 Power Quality Harmonics of Public Grid GB/T 20840.1-2010 Transformer Part 1.General Technical Requirements GB/T 20840.2-2014 Transformers Part 2.Supplementary technical requirements for current 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

The terms and definitions defined in GB/T 20840.1-2010, GB/T 20840.2-2014 and the following apply to this protocol. A current transformer that can convert primary current containing harmonic components into secondary current in proportion. 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) The Fourier series decomposition of the periodic AC quantity is carried out, and the components whose frequencies are greater than 1 integer times of the fundamental frequency are obtained. [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 sum of the root mean square value Ih of the h-th harmonic component contained in the periodic AC quantity and the root mean square value I1 of the fundamental wave component ratio (expressed as a percentage). The h-th harmonic current content is expressed as HRIh. ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of JJG 1176-2021_English be delivered?

Answer: Upon your order, we will start to translate JJG 1176-2021_English as soon as possible, and keep you informed of the progress. The lead time is typically 2 ~ 4 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of JJG 1176-2021_English with my colleagues?

Answer: Yes. The purchased PDF of JJG 1176-2021_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.