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JJG 1189.4-2022 English PDF

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US$509.00 · In stock
Delivery: <= 5 days. True-PDF full-copy in English will be manually translated and delivered via email.
JJG 1189.4-2022: Instrument Transformers - Part 4: Voltage Transformers in Power System
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
JJG 1189.4-2022	509	Add to Cart	5 days	Instrument Transformers - Part 4: Voltage Transformers in Power System	Valid

Similar standards

JJG 1192 JJG 1189.3 JJF 1189

Basic data

Standard ID: JJG 1189.4-2022 (JJG1189.4-2022)
Description (Translated English): Instrument Transformers - Part 4: Voltage Transformers in Power System
Sector / Industry: Metrology & Measurement Industry Standard
Word Count Estimation: 26,277
Date of Issue: 2022-12-07
Date of Implementation: 2023-06-07
Issuing agency(ies): State Administration for Market Regulation

JJG 1189.4-2022: Instrument Transformers - Part 4: Voltage Transformers in Power System

---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.
National Metrology Verification Regulations of the People's Republic of China Measuring transformer Part 4.Power voltage transformers Released on 2022-12-07 2023-06-07 Implementation Released by the State Administration for Market Regulation Measuring transformer Part 4.Power voltage transformers Verification Regulations Transformers Part 4.Voltage Replace JJG 1021-2007 Power voltage transformer part Responsible Unit. High Voltage Metrology Sub-Technical Committee of National Electromagnetic Metrology Technical Committee Main drafting unit. National High Voltage Metering Station State Grid Zhejiang Electric Power Co., Ltd. Marketing Service Center Participating in the drafting unit. State Grid Hebei Electric Power Co., Ltd. Electric Power Research Institute State Grid Hubei Electric Power Co., Ltd. Metering Center Suzhou Huadian Electric Co., Ltd. This regulation entrusts the High Voltage Metrology Sub-Technical Committee of the National Electromagnetic Metrology Technical Committee to be responsible for interpretation The main drafters of this regulation. Zhou Feng (National High Voltage Metering Station) Yue Changxi (National High Voltage Metering Station) Xu Lingjie (Marketing Service Center of State Grid Zhejiang Electric Power Co., Ltd.) Participating drafters. Shi Lun (Electric Power Research Institute of State Grid Hebei Electric Power Co., Ltd.) Li Jun (Metering Center of State Grid Hubei Electric Power Co., Ltd.) Wang Jian (Suzhou Huadian Electric Co., Ltd.)

Introduction (Ⅱ) 1 Scope(1) 2 References(1) 3 Terms and units of measurement(1) 4 Overview(2) 5 Metrological performance requirements (2) 5.1 Accuracy classes(2) 5.2 Basic error(2) 5.3 Cycle Stability(3) 6 General technical requirements (3) 6.1 Appearance and logo (3) 6.2 Winding Polarity(3) 6.3 Insulation resistance(3) 7 Measuring Instrument Control(4) 7.1 Test conditions (4) 7.2 Measurement standards and supporting equipment (4) 7.3 Verification items (5) 7.4 Verification method (5) 7.5 Processing of verification results (8) 7.6 Verification cycle (9) Appendix A Verification Wiring Effect(10) Appendix B High-voltage power supply for on-site verification of voltage transformers (12) Appendix C Verification Original Record Format (16) Appendix D Inspection Certificate/Inner Page Format of Inspection Result Notification (Page 2) (19) Appendix E Verification Certificate/Verification Result Notice Verification Result Page Sample (Page 3) (20)

Introduction

JJF1002-2010 "Rules for Writing National Metrology Verification Regulations", JJF1001 "General Metrology Terms and Definitions" Together with JJF1059.1-2012 "Assessment and Expression of Measurement Uncertainty", it forms the basis to support the formulation of this regulation Sex series norms. This regulation is part 4 of JJG 1189 "Measuring Transformers". "Measurement Transformer" is proposed to be composed of 9 parts composition. --- Part 1.Standard current transformers; --- Part 2.Standard voltage transformers; --- Part 3.Power current transformers; --- Part 4.Power voltage transformers; --- Part 5.Three-phase combined transformer; --- Part 6.Harmonic current transformers; --- Part 7.Harmonic voltage transformers; --- Part 8.Wide range current transformers; --- Part 9.Anti-DC current transformers. This regulation replaces the power voltage transformer part of JJG 1021-2007 "Power Transformer", and is consistent with Compared with JJG 1021-2007, the main technical differences are as follows. --- Divide JJG 1021 into power current transformer, power voltage transformer and three-phase combined transformer part; ---Deleted the relevant content of using a capacitive voltage divider as a standard; ---Deleted the content related to the poor operation; ---Deleted the relevant content of the power frequency withstand voltage test; --- Deleted the relevant content of the load extrapolation method; --- Added the relevant content of the digital comparison method, see 7.2 and 7.4; --- Added methods for reducing the influence of verification wiring during field tests, see Appendix A; --- Added the method of boosting the high-voltage power supply during the field test, see Appendix B. Release status of previous versions of this regulation. ---JJG 1021-2007. Measuring transformer Part 4.Verification Regulations for Power Voltage Transformers

1 Scope

This regulation applies to the first inspection of power frequency power voltage transformers installed in the power system for metering and measurement. determination, follow-up verification and in-use inspection. This regulation does not apply to electronic voltage transformers.

2 References

This procedure references the following documents. JJG 169 Transformer calibrator JJG 314 Measuring voltage transformer JJF1701.2 Measuring Transformer Type Evaluation Outline Part 2.Standard Voltage Transformer GB/T 9091 Inductive voltage divider For dated references, only the dated version applies to this regulation; for undated references document, its latest version (including all amendments) applies to this regulation.

3 Terminology and units of measurement

The following terms and definitions apply to this procedure. In the power system, it plays the role of electrical isolation and voltage transformation according to the ratio. A transformer that provides a secondary voltage signal that is accurately proportional to the primary voltage signal for devices such as metering and automatic protection. 3.2 Ratio difference ratioerror The error introduced by the voltage transformer in the measurement due to the fact that the actual transformation ratio is not equal to the rated transformation ratio. voltage transformer The ratio difference fU is calculated according to formula (1). fU= KUU2-U1 U1 × 100% (1) In the formula. KU---Rated transformation ratio of voltage transformer, dimensionless; U1---effective value of primary voltage, V; U2---the effective value of the secondary voltage, V. 3.3 phase difference phasedisplacement The phase difference between the primary voltage phasor and the secondary voltage phasor of a voltage transformer, and the phasor direction is based on the ideal voltage mutual inductance It is determined that the phase difference of the device is zero. When the secondary voltage phasor is ahead of the primary voltage phasor, the phase difference is positive, and the unit is usually Expressed in minutes (') or centimeters (mrad). ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of JJG 1189.4-2022_English be delivered?

Answer: Upon your order, we will start to translate JJG 1189.4-2022_English as soon as possible, and keep you informed of the progress. The lead time is typically 3 ~ 5 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of JJG 1189.4-2022_English with my colleagues?

Answer: Yes. The purchased PDF of JJG 1189.4-2022_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.