Foreword
Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.
This document is drafted in accordance with GB/T 1.1-2020 Directives for standardization - Part 1: Rules for the structure and drafting of standardizing documents.
This document is Part 19 of GB/T 2900 Electrotechnical terminology. More than 100 parts have been issued in GB/T 2900.
This document replaces GB/T 2900.19-2009 Electrotechnical terminology - High-voltage test technique and insulation co-ordination. In addition to structural adjustments and editorial changes, the following main technical changes have been made with respect GB/T 2900.19-2009:
——The following terms and definitions are added: rated voltage for d.c. equipment (see 3.1.7), nominal d.c. voltage (see 3.1.9), highest d.c voltage (see 3.1.10), non-disruptive discharge (see 3.1.12.6), corona (see 3.1.14), leakage current (see 3.1.15), dielectric dissipation factor (see 3.1.16), insulation resistance (see 3.1.17), altitude correction factor (see 3.1.21.4), standard withstand voltage test (see 3.2.2.1), prospective characteristics of a test voltage (see 3.2.2.1), actual characteristics of a test voltage (see 3.2.2.2), withstand voltage of a test object (see 3.2.2.3), assured disruptive discharge voltage of a test object (see 3.2.2.4), and co-ordination withstand voltage (see 3.3.21);
——The following terms and definitions are modified: high-voltage techniques (see 3.1.1; 2.1 of Edition 1994), equipment for electric power transmission and distribution (see 3.1.3; 2.3 of Edition 1994), nominal voltage of a three-phase system (see 3.1.4; 2.4 of Edition 1994), highest voltage of a three-phase system (see 3.1.5; 2.5 of Edition 1994), rated voltage for equipment (see 3.1.6; 2.6 of Edition 1994), highest voltage of equipment (see 3.1.8; 2.7 of Edition 1994), voltage stress (see 3.1.11; 2.10 of Edition 1994), disruptive discharge (see 3.1.12.1; 4.4 of Edition 1994), flashover (see 3.1.12.2; 4.1 of Edition 1994), spark discharge (see 3.1.12.3; 4.2 of Edition 1994), puncture (see 3.1.12.4; 4.3 of Edition 1994), withstand voltage (set and statistical) (see 3.3.20; 3.38 of Edition 1994), and measuring system (see 3.4.2; 5.2 of Edition 1994);
——The following terms and definitions are deleted: standard impulse current (see 4.36 of Edition 1994), local discharge capacity (see 4.53 of Edition 1994), cascade power-frequency test transformer (see 5.1.2 of Edition 1994), power frequency resonant testing transformer (see 5.1.3 of Edition 1994), digital photographic system (see 5.2.8 of Edition 1994) and (screen) memory oscilloscope (see 5.3.5 of Edition 1994).
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. The issuing body of this document shall not be held responsible for identifying any or all such patent rights.
This document was proposed by the China Electrical Equipment Industry Association.
This document is under the jurisdiction of the National Technical Committee on High Voltage Test Techniques and Insulation Coordination of Standardization Administration of China (SAC/ TC 163).
The previous editions of this document are as follows:
——This standard was firstly issued with the code of GB/T 2900.19-1982; firstly revised in 1994;
——This is the second revision.
Introduction
GB/T 2900 Electrotechnical terminology includes a list of parts. The purpose of developing electrotechnical terminology standards is to provide accurate, concise and correct definitions of concepts recognized in the fields of electrics, electronics and telecommunications, and to designate the terms expressing such concepts. The "standardization-oriented” development of electrotechnical terminology standards aims to help standard writers to prepare standards, help users understand and implement them, and also help translators to translate normative (and more generally technical) texts. The purpose of defining electrotechnical terms is not to cover all the terms used in all kinds of electrical technical standards, but to define general terms related to electrical technology.
This document is Part 19 of GB/T 2900. This document is formulated for standardizing the electrotechnical terms, related to high voltage test technology and insulation coordination, used in standards, technical documents, professional manuals, teaching materials, books and periodicals, etc. It will serve the personnel engaged in departments of scientific research, design, production, teaching, publishing and others in relevant fields.
Electrotechnical terminology - High-voltage test technique and insulation co-ordination
1 Scope
This document defines the relevant terms used in the fields of high voltage test technique and insulation co-ordination.
This document is applicable to the scientific and technical fields related to high voltage test technique and insulation co-ordination involved with three-phase a.c. systems with a nominal voltage above 1 kV and d.c. systems with a nominal voltage above 1.5 kV.
2 Normative references
No normative reference is included in this document.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1 General terms
3.1.1
high-voltage techniques
techniques relevant to high voltage, strong electric field, insulation, over-voltage and insulation co-ordination, high voltage test and others in high voltage applications
3.1.2
high-voltage electric power equipment
general name of high-voltage equipment for power generation, transmission and distribution in a power system
3.1.3
equipment for electric power transmission and distribution
general name of power equipment and materials used for power transmission and distribution and ones for control, measurement and protection of such power equipment in a power system
3.1.4
nominal voltage of a three-phase system
Un
suitable, approximate voltage value used to represent or identify the interphase voltage (r.m.s.) of a three-phase system
3.1.5
highest voltage of a three-phase system
Us
r.m.s. value of the highest interphase operating voltage at any point in a three-phase system at any time under normal operating conditions
3.1.6
rated voltage for a.c. equipment
interphase voltage (r.m.s.) marked on equipment and related to certain operating characteristics of a system
Note: For the equipment that this definition is not applicable to, the definition of this term is specified in an applicable professional standard.
3.1.7
rated voltage for d.c. equipment
d.c. voltage marked on equipment and related to certain operating characteristics of a system
Note: This definition is not applicable to d.c. arrester equipment.
3.1.8
highest voltage for a.c. equipment
r.m.s. value of the highest interphase voltage designed according to the insulation of the equipment and other characteristics related to the equipment standards associated with it
Note: This voltage may be continuously applied to the equipment under the normal operating conditions as specified by the relevant technical committee.
3.1.9
nominal d.c. voltage
average value of d.c. voltage required to transmit nominal power at a nominal current
3.1.10
highest d.c. voltage
highest d.c. voltage withstood by the equipment during continuous operation considering insulation and other characteristics
3.1.11
voltage stress
any single or set of voltages applied to an insulation configuration terminal
Note 1: For two-terminal insulation configurations, such as phase-to-earth insulation configurations, it is characterized by the peak value (or r.m.s value or average value) and the waveform.
Note 2: For three-terminal insulation configurations (the voltage stress includes two phase-to-earth voltages), such as phase-to-phase insulation configurations and longitudinal insulation configurations, it consists of two relative ground voltages, it is characterized by the peak value of the two components, the waveform and the difference between the two peak times.
Note 3: When the peak times of the two components do not coincide, the combined voltage is fully characterized by the following data:
a) the peak moment of a component, the instantaneous value of the other component;
b) the combined voltage peak value and the instantaneous value of the components at the time of the combined voltage peak value, when different from the foregoing case.
Foreword I
Introduction III
1 Scope
2 Normative references
3 Terms and definitions
3.1 General terms
3.2 High-voltage test technique
3.3 Overvoltage and insulation co-ordination
3.4 High-voltage test equipment and measuring system
Bibliography
Index
Figure 1 Full lightning impulse voltage
Figure 2 Front-chopped lightning impulse voltage
Figure 3 Tail-chopped lightning impulse
Figure 4 Linearly rising front-chopped impulse
Figure 5 Voltage/time curve for impulse voltage of constant prospective shape
Figure 6 Full switching impulse
Figure 7 Exponential impulse current
Figure 8 Estimation of risk of failure of the insulation
Foreword
Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.
This document is drafted in accordance with GB/T 1.1-2020 Directives for standardization - Part 1: Rules for the structure and drafting of standardizing documents.
This document is Part 19 of GB/T 2900 Electrotechnical terminology. More than 100 parts have been issued in GB/T 2900.
This document replaces GB/T 2900.19-2009 Electrotechnical terminology - High-voltage test technique and insulation co-ordination. In addition to structural adjustments and editorial changes, the following main technical changes have been made with respect GB/T 2900.19-2009:
——The following terms and definitions are added: rated voltage for d.c. equipment (see 3.1.7), nominal d.c. voltage (see 3.1.9), highest d.c voltage (see 3.1.10), non-disruptive discharge (see 3.1.12.6), corona (see 3.1.14), leakage current (see 3.1.15), dielectric dissipation factor (see 3.1.16), insulation resistance (see 3.1.17), altitude correction factor (see 3.1.21.4), standard withstand voltage test (see 3.2.2.1), prospective characteristics of a test voltage (see 3.2.2.1), actual characteristics of a test voltage (see 3.2.2.2), withstand voltage of a test object (see 3.2.2.3), assured disruptive discharge voltage of a test object (see 3.2.2.4), and co-ordination withstand voltage (see 3.3.21);
——The following terms and definitions are modified: high-voltage techniques (see 3.1.1; 2.1 of Edition 1994), equipment for electric power transmission and distribution (see 3.1.3; 2.3 of Edition 1994), nominal voltage of a three-phase system (see 3.1.4; 2.4 of Edition 1994), highest voltage of a three-phase system (see 3.1.5; 2.5 of Edition 1994), rated voltage for equipment (see 3.1.6; 2.6 of Edition 1994), highest voltage of equipment (see 3.1.8; 2.7 of Edition 1994), voltage stress (see 3.1.11; 2.10 of Edition 1994), disruptive discharge (see 3.1.12.1; 4.4 of Edition 1994), flashover (see 3.1.12.2; 4.1 of Edition 1994), spark discharge (see 3.1.12.3; 4.2 of Edition 1994), puncture (see 3.1.12.4; 4.3 of Edition 1994), withstand voltage (set and statistical) (see 3.3.20; 3.38 of Edition 1994), and measuring system (see 3.4.2; 5.2 of Edition 1994);
——The following terms and definitions are deleted: standard impulse current (see 4.36 of Edition 1994), local discharge capacity (see 4.53 of Edition 1994), cascade power-frequency test transformer (see 5.1.2 of Edition 1994), power frequency resonant testing transformer (see 5.1.3 of Edition 1994), digital photographic system (see 5.2.8 of Edition 1994) and (screen) memory oscilloscope (see 5.3.5 of Edition 1994).
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. The issuing body of this document shall not be held responsible for identifying any or all such patent rights.
This document was proposed by the China Electrical Equipment Industry Association.
This document is under the jurisdiction of the National Technical Committee on High Voltage Test Techniques and Insulation Coordination of Standardization Administration of China (SAC/ TC 163).
The previous editions of this document are as follows:
——This standard was firstly issued with the code of GB/T 2900.19-1982; firstly revised in 1994;
——This is the second revision.
Introduction
GB/T 2900 Electrotechnical terminology includes a list of parts. The purpose of developing electrotechnical terminology standards is to provide accurate, concise and correct definitions of concepts recognized in the fields of electrics, electronics and telecommunications, and to designate the terms expressing such concepts. The "standardization-oriented” development of electrotechnical terminology standards aims to help standard writers to prepare standards, help users understand and implement them, and also help translators to translate normative (and more generally technical) texts. The purpose of defining electrotechnical terms is not to cover all the terms used in all kinds of electrical technical standards, but to define general terms related to electrical technology.
This document is Part 19 of GB/T 2900. This document is formulated for standardizing the electrotechnical terms, related to high voltage test technology and insulation coordination, used in standards, technical documents, professional manuals, teaching materials, books and periodicals, etc. It will serve the personnel engaged in departments of scientific research, design, production, teaching, publishing and others in relevant fields.
Electrotechnical terminology - High-voltage test technique and insulation co-ordination
1 Scope
This document defines the relevant terms used in the fields of high voltage test technique and insulation co-ordination.
This document is applicable to the scientific and technical fields related to high voltage test technique and insulation co-ordination involved with three-phase a.c. systems with a nominal voltage above 1 kV and d.c. systems with a nominal voltage above 1.5 kV.
2 Normative references
No normative reference is included in this document.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1 General terms
3.1.1
high-voltage techniques
techniques relevant to high voltage, strong electric field, insulation, over-voltage and insulation co-ordination, high voltage test and others in high voltage applications
3.1.2
high-voltage electric power equipment
general name of high-voltage equipment for power generation, transmission and distribution in a power system
3.1.3
equipment for electric power transmission and distribution
general name of power equipment and materials used for power transmission and distribution and ones for control, measurement and protection of such power equipment in a power system
3.1.4
nominal voltage of a three-phase system
Un
suitable, approximate voltage value used to represent or identify the interphase voltage (r.m.s.) of a three-phase system
3.1.5
highest voltage of a three-phase system
Us
r.m.s. value of the highest interphase operating voltage at any point in a three-phase system at any time under normal operating conditions
3.1.6
rated voltage for a.c. equipment
interphase voltage (r.m.s.) marked on equipment and related to certain operating characteristics of a system
Note: For the equipment that this definition is not applicable to, the definition of this term is specified in an applicable professional standard.
3.1.7
rated voltage for d.c. equipment
d.c. voltage marked on equipment and related to certain operating characteristics of a system
Note: This definition is not applicable to d.c. arrester equipment.
3.1.8
highest voltage for a.c. equipment
r.m.s. value of the highest interphase voltage designed according to the insulation of the equipment and other characteristics related to the equipment standards associated with it
Note: This voltage may be continuously applied to the equipment under the normal operating conditions as specified by the relevant technical committee.
3.1.9
nominal d.c. voltage
average value of d.c. voltage required to transmit nominal power at a nominal current
3.1.10
highest d.c. voltage
highest d.c. voltage withstood by the equipment during continuous operation considering insulation and other characteristics
3.1.11
voltage stress
any single or set of voltages applied to an insulation configuration terminal
Note 1: For two-terminal insulation configurations, such as phase-to-earth insulation configurations, it is characterized by the peak value (or r.m.s value or average value) and the waveform.
Note 2: For three-terminal insulation configurations (the voltage stress includes two phase-to-earth voltages), such as phase-to-phase insulation configurations and longitudinal insulation configurations, it consists of two relative ground voltages, it is characterized by the peak value of the two components, the waveform and the difference between the two peak times.
Note 3: When the peak times of the two components do not coincide, the combined voltage is fully characterized by the following data:
a) the peak moment of a component, the instantaneous value of the other component;
b) the combined voltage peak value and the instantaneous value of the components at the time of the combined voltage peak value, when different from the foregoing case.
Contents of GB/T 2900.19-2022
Foreword I
Introduction III
1 Scope
2 Normative references
3 Terms and definitions
3.1 General terms
3.2 High-voltage test technique
3.3 Overvoltage and insulation co-ordination
3.4 High-voltage test equipment and measuring system
Bibliography
Index
Figure 1 Full lightning impulse voltage
Figure 2 Front-chopped lightning impulse voltage
Figure 3 Tail-chopped lightning impulse
Figure 4 Linearly rising front-chopped impulse
Figure 5 Voltage/time curve for impulse voltage of constant prospective shape
Figure 6 Full switching impulse
Figure 7 Exponential impulse current
Figure 8 Estimation of risk of failure of the insulation
