GB/T 15544.2-2017 English PDF

US$1104.00 · In stock
Delivery: <= 5 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 15544.2-2017: Short-circuit current calculation in three-phase a.c. systems -- Part 2: Factors for the calculation of short-circuit currents
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 15544.2-2017	1104	Add to Cart	5 days	Short-circuit current calculation in three-phase a.c. systems -- Part 2: Factors for the calculation of short-circuit currents	Valid

Similar standards

GB/T 33592   GB/T 31960.1   GB/T 12326   GB/T 15544.1   GB/T 15544.4   GB/T 15544.5   

Basic data

Standard ID: GB/T 15544.2-2017 (GB/T15544.2-2017)
Description (Translated English): Short-circuit current calculation in three-phase a.c. systems -- Part 2: Factors for the calculation of short-circuit currents
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: F20
Classification of International Standard: 29.240.20
Word Count Estimation: 58,573
Date of Issue: 2017-12-29
Date of Implementation: 2018-07-01
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China

GB/T 15544.2-2017: Short-circuit current calculation in three-phase a.c. systems -- Part 2: Factors for the calculation of short-circuit currents

---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.
Short-circuit current calculation in three-phase acsystems-Part 2. Factors for the calculation of short-circuit currents ICS 29.240.20 F20 National Standards of People's Republic of China Short-circuit current calculation for three-phase AC system Part 2. Coefficients for Short-Circuit Current Calculation Applications Part 2.Factorsforthecalculationofshort-circuitcurrents (IEC TR60909-1.2002, Short-circuit current calculation inthree-phasea.c.systems-Part 1.Factorsforthecalculationof short-circuitcurrentsaccordingtoIEC 60909-0,IDT) Published on.2017-12-29 2018-07-01 Implementation General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China China National Standardization Administration released Directory Preface III 1 Overview 1 1.1 Scope and Purpose 1 1.2 Normative references 1 1.3 Application of coefficients 1 1.3.1 Coefficient c 1 1.3.2 Coefficients KG and KS or KSO 1 1.3.3 Coefficients KG.S, KT.S or KG.SO, KT.SO 1 1.3.4 Factor KT 1 1.3.5 Coefficient κ 1 1.3.6 Coefficient μ, λ, q 1 1.3.7 Coefficients m and n 2 1.3.8 Influence of Asynchronous Motor on Initial Symmetrical Short Circuit Current 1.4 Symbols, Lower and Upper Marks 2 1.4.1 Symbol 2 1.4.2 Lower Corner 2 1.4.3 Superscript 3 Coefficient 3 used in 2 GB/T 15544.1 2.1 The voltage constant of the short-circuit point equivalent voltage source 3 2.1.1 Overview 3 2.1.2 Calculation Method 3 2.1.3 Equivalent voltage source of short-circuit point and voltage coefficient c 4 2.1.4 A simple model 4 illustrating the meaning of the voltage coefficient c 2.2 Short-circuit impedance correction coefficient of generator, step-up transformer and generator transformer set 7 2.2.1 Overview 7 2.2.2 Correction Factor KG 7 2.2.3 Correction factor for generator transformer sets with on-load tap-changer 9 2.2.3.1 Correction Factor KS 9 2.2.3.2 Correction Factor KG.S and KT.S 12 2.2.4 Correction factor for generator transformer sets without on-load tap-changer 16 2.2.4.1 Correction Factor KSO 16 2.2.4.2 Correction Factors KG.SO and KT.SO 17 2.2.5 Applicability of impedance correction coefficients in meshed networks 20 2.3 Network Transformer Impedance Correction Factor KT 21 2.3.1 Overview 21 2.3.2 Capacity 300 MVA Transformer Example 23 2.3.3 Statistical analysis of 150 transformers 25 2.3.4 Transformer Impedance Correction Factor in a Mesh Network 2.4 Peak Short-circuit Current Coefficient κ 28 2.4.1 Overview 28 2.4.2 Coefficient κ 28 in series RL loop 2.4.3 Factor κ 30 for parallel RLZ loops 2.4.4 Peak short-circuit current ip 32 in a mesh network 2.4.5 Mesh Power Grid Study 33 2.5 Calculation coefficient of symmetrical breaking current μ 34 2.5.1 Overview 34 2.5.2 Basic Concepts 35 2.5.3 Calculating symmetrical breaking current 36 using the application factor μ 2.6 Calculation coefficient for steady-state short-circuit current λ(λmax, λmin) 37 2.6.1 Overview 37 2.6.2 Effect of Core Saturation 38 2.6.2.1 Characteristic curve method (parking relay reactance) 38 2.6.2.2 Simplified method for calculating λ 39 2.7 Short-circuit breaking current calculation coefficient of asynchronous motor q 40 2.7.1 Overview 40 2.7.2 The deviation of coefficient q 41 2.7.3 Short-circuit breaking current at unbalanced short circuit 44 2.8 Joule Integral and Thermal Equivalent Short Circuit Current Calculation Factors m and n 45 2.8.1 Overview 45 2.8.2 Time-varying three-phase short-circuit current 45 2.8.3 Coefficient m 46 2.8.4 Coefficient n 46 2.8.5 Coefficient n 47 of Fig. 22 in GB/T 15544.1 2.9 Rules for the contribution of an asynchronous motor (group) to the initial symmetrical short-circuit current 48 2.9.1 Overview 48 2.9.2 Short circuit of asynchronous motor terminal 48 2.9.3 Local short-circuit current of induction motor fed by transformer 49 2.9.4 Local Short Circuit Current of Induction Motor Supplied by Multiple Transformers Reference 53

Foreword

GB/T 15544 "Three-phase AC system short-circuit current calculation" is divided into the following five parts. --- Part 1. Current calculations; --- Part 2. Coefficients for short circuit current calculation applications; --- Part 3. Electrical Equipment Data; --- Part 4. Simultaneous occurrence of two independent single-phase ground fault currents and currents flowing through the earth; --- Part 5. Examples. This part is part 2 of GB/T 15544. This section was drafted in accordance with the rules given in GB/T 1.1-2009. This section uses the translation method equivalent to the use of IEC /T R60909-1.2002 "Three-phase AC system short-circuit current calculation Part 1. According to IEC 60909-0 Coefficients for Short-Circuit Current Calculation Applications." The Chinese documents that are consistent with the normatively cited international documents in this section are as follows. ---GB/T 156-2007 standard voltage (IEC 60038.2002, MOD); ---GB/T 15544.3-2017 Short-circuit current calculation for three-phase AC systems Part 3. Electrical equipment data (IEC TR60909-2.2008, IDT). This section made the following editorial changes. --- To be consistent with the existing standard series, change the name of this part to "Three-phase AC system short-circuit current calculation Part 2. Short-circuit electricity Flow Calculation Application Coefficients". This section was proposed by the China Electricity Council. This part is under the jurisdiction of the National Standardization Technical Committee on short-circuit current calculation (SAC/TC424). This section drafted by. State Grid Corporation of China State Electric Power Dispatching Control Center, China Electric Power Research Institute, Xi'an Jiaotong University. The main drafters of this section. Tang Yong, Li Mingjie, Bu Guangquan, Zhou Ji, Zhang Yantao, Guo Qiang, Xiao Yu, Jiang Shude, Yin Yonghua, Shen Xuhui, Shi Haobo, Duan Xiangying, Zhang Yuhong, Han Jiahui, Zhao Qiang, and Li Jing. Short-circuit current calculation for three-phase AC system Part 2. Coefficients for Short-Circuit Current Calculation Applications

1 Overview

1.1 Scope and purpose This part of GB/T 15544.1 specifies the method for calculating the short-circuit current of a three-phase AC system by introducing various coefficients to meet the standards. Technical accuracy and simplification requirements. This section describes the various factors introduced in GB/T 15544.1. This section is right The addition of GB/T 15544.1 does not change the standardized calculation method already specified. 1.2 Normative references The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article Pieces. For undated references, the latest version (including all amendments) applies to this document. GB/T 15544.1-2013 Three-phase AC system short-circuit current calculation Part 1. Current calculation (IEC 60909-0.2001, IDT) GB/T 15544.5-2017 Short-circuit current calculation for three-phase AC systems Part 5. Example (IEC /T R60909-4.2000, IDT) IEC 60038. 1983 IEC standandvoltages IEC /T R60909-2.1992 Electrical equipment data for short-circuit current calculation applications according to IEC 60909 (1988) [Electrical equipment-Dataforshort-circuitcurrentcalculationsinaccordancetoIEC 60909(1988)] 1.3 Application of coefficients 1.3.1 Coefficient c The voltage coefficients cmax and cmin are used simultaneously with the equivalent voltage source at the short-circuit point to calculate the maximum and minimum initial short-circuit currents. 1.3.2 Coefficients KG and KS or KSO The impedance correction factor KG, KS or KSO is introduced when calculating the short-circuit impedance of the generator-generator transformer group. 1.3.3 Coefficients KG.S, KT.S or KG.SO, KT.SO Short circuit between generator and unit transformer (with or without load adjustment taps), impedance correction system when calculating local short-circuit current Number KG.S, KT.S or KG.SO, KT.SO. 1.3.4 Factor KT The impedance correction factor KT is introduced when calculating the short-circuit impedance of the grid transformer. 1.3.5 Coefficient κ The peak short-circuit current is calculated using the factor κ. 1.3.6 Coefficient μ, λ, q Calculate the coefficient used when the AC component of the short-circuit current near the generator or near the induction motor decays. ......

Image     

Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 15544.2-2017_English be delivered?

Answer: Upon your order, we will start to translate GB/T 15544.2-2017_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 GB/T 15544.2-2017_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 15544.2-2017_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.