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GB/T 19749.4-2023: Coupling capacitors and capacitor dividers - Part 4: DC or AC single-phase capacitor dividers
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Coupling capacitors and capacitor dividers - Part 4: DC or AC single-phase capacitor dividers
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GB/T 19749.4-2023
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Basic data | Standard ID | GB/T 19749.4-2023 (GB/T19749.4-2023) | | Description (Translated English) | Coupling capacitors and capacitor dividers - Part 4: DC or AC single-phase capacitor dividers | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | K42 | | Classification of International Standard | 31.060.70 | | Word Count Estimation | 13,135 | | Date of Issue | 2023-05-23 | | Date of Implementation | 2023-09-01 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 19749.4-2023: Coupling capacitors and capacitor dividers - Part 4: DC or AC single-phase capacitor dividers
---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.
ICS 31:060:70
CCSK42
National Standards of People's Republic of China
Coupling Capacitors and Capacitive Dividers
Part 4: DC or AC single-phase capacitive voltage dividers
(IEC 60358-4:2018, MOD)
Released on 2023-05-23
2023-09-01 implementation
State Administration for Market Regulation
Released by the National Standardization Management Committee
foreword
This document is in accordance with the provisions of GB/T 1:1-2020 "Guidelines for Standardization Work Part 1: Structure and Drafting Rules for Standardization Documents"
drafting:
This document is part 4 of GB/T 19749 "Coupling Capacitors and Capacitive Voltage Dividers": GB/T 19749 has issued the following
part:
--- Part 1: General;
--- Part 2: DC or AC single-phase coupling capacitors connected between line and ground for power line carrier (PLC);
--- Part 3: AC or DC coupling capacitors for harmonic filters;
--- Part 4: DC or AC single-phase capacitive voltage divider:
This document is modified to adopt IEC 60358-4:2018 "Coupling capacitors and capacitive voltage dividers - Part 4: DC or AC single-phase capacitive dividers
Compressor":
The technical differences between this document and IEC 60358-4:2018 and their reasons are as follows:
---Changed the content of the scope, according to the requirements of GB/T 1:1-2020, added the specific content specified in the document;
--- Changed the normative reference documents, replaced IEC 60358-1:2012 with GB/T 19749:1-2016, between the two documents
The degree of consistency is modified to meet the requirements of my country's insulation level and increase operability;
---Changed the withstand voltage between the intermediate terminal and the grounding terminal, in order to adapt to the actual situation of my country's power system, according to the relevant requirements
Change to: For medium-voltage terminals, the nominal voltage is not less than 3kV, and the withstand AC voltage between the medium-voltage terminal and the grounding terminal is based on
Table 3 of GB/T 19749:1-2016 is selected; when the nominal voltage of the middle voltage terminal is lower than 3kV, the distance between it and the grounding terminal
The withstand AC voltage is 6 times its nominal voltage, but not less than 3kV (see 6:2:1:400);
--- Changed the sealing test of liquid immersion equipment, in order to cover gas products, the "tightness test of liquid immersion equipment" was revised as
"Sealing test", and the specific content has been revised according to the title (see 9:1);
--- Increased tanδ measurement to adapt to actual use (see 9:2:400:1:1):
The following editorial changes were made to this document:
---Replace the source documents of terms and definitions in IEC 60358-4:2018 with Chinese documents (see 3:400:1, 3:400:2 and
3:400:4 etc:);
--- Change the subscript "2:1" in all figures of IEC 60358-4:2018 to "2";
---Change the subscripts of R in all figures of IEC 60358-4:2018 to "RS1 and RS2 or RP1 and RP2" in series and parallel connection;
--- Modify "Figure 402:1" of IEC 60358-4:2018 to "Figure 4A:1:a)" and "Figure 402:2" to "Figure 4A:1:b)";
--- Added references:
Please note that some contents of this document may refer to patents: The issuing agency of this document assumes no responsibility for identifying these patents:
This document is proposed by China Electrical Equipment Industry Association:
This document is under the jurisdiction of the National Power Capacitor Standardization Technical Committee (SAC/TC45):
This document is drafted by: Xi'an High Voltage Apparatus Research Institute Co:, Ltd:, Xi'an Xidian Power Capacitor Co:, Ltd:, Guilin Power
Power Capacitor Co:, Ltd:, Nissin Electric (Wuxi) Co:, Ltd:, China Electric Power Research Institute Co:, Ltd:, Shaoxing Daming Power Design
Institute Co:, Ltd:, Anhui Feida Electric Technology Co:, Ltd:, State Grid Anhui Electric Power Co:, Ltd: Electric Power Research Institute, Herong Electric Co:, Ltd:
Co:, Ltd:, XJ Electric Co:, Ltd:, Wuxi Chenrui New Energy Technology Co:, Ltd:, Hitachi Energy (China) Co:, Ltd:, State Grid Zhejiang Province
Power companies Shaoxing Power Supply Company, Xiamen Farah Electronics Co:, Ltd:
The main drafters of this document: He Manchao, Zhao Xin, Yuan Fuxing, Jia Hua, Ren Chunyang, Mo Huaming, Zhong Zhengliang, Lei Xiaoyan, Fu Sanchuan, Hu Zhongsheng,
Ni Xuefeng, Liu Jing, Wu Qun, Zhang Chenchen, Fu Zhongxing, Xie Chong, Lin Hao, Li Dian, Huang Yongrui, Li Xu, Huang Shunda:
Introduction
GB/T 19749 "Coupling Capacitors and Capacitive Dividers" is proposed to consist of the following four parts:
--- Part 1: General: The purpose is to establish the general principles and related rules to be followed by coupling capacitors and capacitive voltage dividers:
--- Part 2: DC or AC single-phase coupling capacitors connected between line and ground for power line carrier (PLC): The purpose is
to establish special requirements and related rules for such coupling capacitors:
--- Part 3: AC or DC coupling capacitors for harmonic filters: The purpose is to establish the special
requirements and related rules:
--- Part 4: DC or AC single-phase capacitive voltage divider: The purpose is to establish the special requirements and related
rule:
This document is used together with GB/T 19749:1-2016, unless otherwise specified in this document, this document implements GB/T 19749:1-2016
Provisions: In order to simplify the repeated expression of the same requirements, the terms of this document are the same as GB/T 19749:1-2016, when
When a clause in GB/T 19749:1-2016 is not covered in this document, the clause is applicable as long as it is reasonable: When this document states
When "supplement", "modify" or "replace", the relevant content in GB/T 19749:1-2016 shall be adjusted accordingly: Supplements to these terms
Additional clauses are given under the same reference heading, while additional clauses are numbered starting with 400:
Coupling Capacitors and Capacitive Dividers
Part 4: DC or AC single-phase capacitive voltage dividers
1 Scope
This document specifies the conditions of use, ratings, design requirements, test conditions, test categories, and examples of DC or AC single-phase capacitive voltage dividers:
Conduct tests, type tests, special tests and marking:
This document applies to d:c: or a:c: single-phase capacitive voltage dividers connected between line and earth for potential transformer manufacturing and other applications:
Note 1: An example diagram of a voltage divider applicable to this document is shown in Figure 4A:1 in Appendix 4A [Figure 4A:1:a) and Figure 4A:1:b)]:
Note 2: See GB/T 20840 (all parts) for complete voltage transformer requirements:
2 Normative references
The contents of the following documents constitute the essential provisions of this document through normative references in the text: Among them, dated references
For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to
this document:
GB/T 19749:1-2016 Coupling Capacitors and Capacitive Dividers Part 1: General Rules (IEC 60358-1:2012, MOD)
3 Terms and Definitions
The following terms and definitions defined in GB/T 19749:1-2016 apply to this document:
The following supplementary notes are used for 3:1:6:
NOTE: For DC dividers, Um also includes harmonic peak voltages:
3:400 Definition of Voltage Divider
3:400:1
voltage divider
A device composed of resistors, inductors, capacitors, transformers, or a combination of these devices, between two points of the device can get the required
Fractional value of the applied voltage:
NOTE: In this document, a voltage divider includes a high-voltage part, an internal or external low-voltage part:
[Source: GB/T 2900:89-2012, 312-02-32, modified]
3:400:2
Rated primary voltage ratedprimaryvoltage
The primary voltage value used as a benchmark for voltage divider performance during design:
NOTE: For a voltage divider, performance is all that is related to measurement behavior such as divider ratio, accuracy, load, input voltage range, etc:
[Source: GB/T 2900:94-2015, 4:8, modified]
3:400:3
Usr
The secondary voltage value used as the performance benchmark of the voltage transformer during design:
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