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National Standard of the People's Republic of China
GB 1984—2003
Replaces 19841989
C:R/T 4474—1992
GB/T 7675—:987
High-voltage alternating-current circuit-breakers
High-voltage alternating-current circuit-breakers(1EC 62271-l00:2001 Jligh-voltage switchgear and rontrolgearPart loo:High-voltage aliernating-current circuit-breakers,MOD)2832
Published on 2003-06-05
People's Republic of China
± 4
2004-01-01 Implementation
1 Overview
1 Scope
1.2 Normative references
2 Normal and special conditions of use
Terms and definitions
4 Rated valueswwW.bzxz.Net
Rated voltage (U.)
New insulation level
Rated frequency (f,)
Rated current (I,) and temperature rise
Rated short-time withstand current (I)
Rated peak withstand current (I,)
Rated short-circuit duration ()
Rated power supply voltage (U,) of operating mechanisms and auxiliary and control circuits 4.9
Rated power supply frequency of operating mechanisms and auxiliary circuits 4.10
Insulation. Rated pressure of compressed air source for operation and/or disconnection Rated short-circuit Breaking current (Is:)
Recovery voltage related to rated short-circuit breaking current. Rated short-circuit making current
Rated operating sequence
Near-zone fault characteristics
Rated out-of-step making and breaking current
Rated capacitive breaking current,
Small inductive breaking current ...
Rated time parameter ...
Number of mechanical operations
Circuit breakers are classified according to their electrical life.
Design and structure-
Requirements for hinges in circuit breakers
Requirements for gases in circuit breakers
Grounding of circuit breakers·
5.4 Auxiliary equipment
5.5 Power closing·
Energy storage closing
5.7 Operation independent of human power-
5.8 Trip operation…
GB 1984--2003
GB 1984--2003
Low-pressure and high-pressure locking devices
Interlocking device
Position indication
Protection degree of enclosure
Electromagnetic distance
Gas and vacuum sealing
Liquid sealing
Flammability
5.18 Electromagnetic compatibility (EMC)-
Pole synchronization requirements for single-on and single-off operation, 5.101
General requirements for operation·
Pressure limit of operating body
Evacuation hole
6 Type test·
Overview·
Insulation test
6.3 Radio interference voltage (riv) test Splash of intercircuit resistance…
Temperature rise test
Short-time withstand current and peak withstand current test 6.6
Protection level verification
Sealing test
Electromagnetic compatibility (EMC) test
Mechanical test and environmental test
Various provisions for closing, breaking and opening tests Test circuit for short-circuit closing and breaking tests. Short-circuit test parameters
Short-circuit test procedure
Basic short-circuit test method·
Critical current test
Single-phase and out-of-phase grounding fault test·
Near-zone fault test
Out-of-step closing and breaking test·
Capacitive current opening and closing test·
6. 112Special requirements for closing and breaking tests of E2-level circuit breakers? Factory test
7.1 Insulation test of main circuit
7.2 Insulation test of auxiliary and control circuits
7.3 Measurement of resistance of main circuit
7.4 Sealing test
7.5 Design and external inspection
7.10] Mechanical operation test
8 Selection of circuit breaker operation
8.101 Overview
8.102 Selection of rated values under operating conditions
8.103 Selection of rated values under fault conditions
8.104 Selection of electrical life of interrupters for nominal voltage 3kV~35kV power grids
8.105 Selection of capacitive current switching
9 Documents to be provided with enquiry, tender and order9.101 Documents to be provided with enquiry and order...9 .102 Documents provided together with the tender document
10 Rules for transportation, storage, installation, operation and maintenance 10.1 Conditions for transportation, storage and installation
10.2 Installation
11 Safety
Appendix A (Normative Appendix) Basic method for calculating transient recovery voltage in the vicinity of the fault according to rated characteristics
A.2 Transient voltage on the line side
A.3 Transient voltage on the power supply side
A.4 Calculation example
Appendix B (Normative Appendix) Publication of test parameters in type test Appendix C (Normative Appendix) Records and reports of type test C.1 Recorded data and results
C.2 Contents to be included in the type test report
Appendix D (Normative Appendix) Determination of short-circuit power factor D. 1 Method 1 - Calculation by DC component 11.2 Method 2 - Determination by controlling the generator
Appendix E (normative appendix)
Drawing the envelope
E.3 Determination of parameters
Method for drawing the envelope of the expected transient recovery voltage of the circuit and method for determining characteristic parameters Appendix F (normative appendix) Method for determining the expected transient recovery voltage F.1 Introduction
F.2 Brief description of the recommended method
F.3 Details of the recommended method
F.4 Comparison of various methods
Appendix (normative appendix) Introduction to the theoretical basis of E2 class circuit breakers Appendix H (informative appendix) Current flow of single and back-to-back capacitor banks 1.1 Overview ...
H.2 Example 1 - Opening and closing a parallel capacitor (see Figure I.1) H.3 Example 2 - Combining two parallel capacitors GB 1984—2003
：170
GB19842003
Appendix 1 (informative appendix) Explanatory notes 1 Overview
1.2 Explanatory notes on the DC component of the rated short-circuit breaking current (4.101.2) 1.3 Explanatory notes on the performance of circuit-breakers during tests (6.102.8 and 6.111,11) 1.4 Explanatory notes on the capacitive current switching test (6.111) Appendix " (informative appendix) Tolerances for close-fault tests on test current and line length Appendix K (informative appendix) Table of symbols and abbreviations used in GB1984--2008 References
All technical contents of this standard are mandatory. Preface
GB 1984--2003
This standard is based on IE℃62271-100:2001 (IFC60056 No. 5) High Voltage AC Circuit Breakers and its revision No.: 2002 to fully revise GB1984-:1989 AC Commercial Voltage Circuit Breakers. This standard is consistent with 1EC62271-100.The main difference between this standard and IEC62271100:2001 is reflected in the scope of application. According to the actual situation of my country's power grid, the relevant content of the rated frequency of 60Hz in IEC62271-100 is removed. According to the division of labor in my country's industry, the minimum voltage of the applicable system is changed from 000V to 3000V. The rated voltage values irrelevant to my country's power grid have been removed and given according to the voltage listed in G13/T11022 (or GB156):
——Terminal static horizontal tension. According to user needs, the longitudinal horizontal tension of 252kV~363kV in Table 9 is changed from 1250N to 1500N, and the longitudinal horizontal tension of 550kV~800kV 1750N and the vertical horizontal tension of 1250N are changed to 2000N and 1500N respectively. N:
一- The minimum power supply voltage for the parallel release to operate. According to the requirements of 5.8.2 of GB/T11022-1999, the "20%\ in 5.8.103 is changed to "30%";
一 The contents specified in Table 11 of IFC62271-100 are irrelevant to my country's power grid, so it is removed. The original Table 12 becomes the current Table 11, and the numbers of subsequent tables are successively advanced by one number;
一- Appendix A (standard). In order to facilitate the use of this standard, the rated voltage in the calculation example is changed from IFC62271-100 to The main differences between this standard and GB1984-1989 are: - Differences in standard systems: GB131981-1989 divided IEC62271-100 into three standards when referring to IFC60056:1987, namely GB1984-1989, GB/T4474-1992, GB7675-1987 and JB5871-1991. The new version of GB/T1984 will include the contents of the above four standards, - Rated voltage has been modified according to the provisions of GB/T11022-1999 or GB156-1993, and according to the needs of development, a voltage value of 800kV and related parameters have been added: - - It is clarified that this standard is not applicable, such as circuit breakers in mobile power stations for electric traction equipment, etc., ~ The number of references and given terms has been greatly increased, such as \ non Maintain destructive discharge (NSDD)\, "CI level, C2 level, E1 level, E2 level, M1 level and M2 level circuit breakers\, etc.:
" - The rated characteristics are divided into three categories, "rated special characteristics that should be given for all circuit breakers", "rated characteristics that should be given under special circumstances" and "rated characteristics that should be given when required": ~- Add time constants under special working conditions: 60ms, 75ms and 120ms, and give the applicable occasions of these three time constants; - Increase the standard multiplier of the second and third breaking poles TRV for rated voltages above 72.5kV, that is, give the standard values of the second and third breaking poles TRV;
-- Give the preferred value of the rated cable charging current; - Add "rated breaking time" to the rated time parameter, - Increase the number of operations and test method requirements for "circuit breakers with extended mechanical life (M2 level)": - Add the electrical life requirements for H2 level circuit breakers! 1. Added the requirements for capacitive current opening and closing test of C2 class circuit breakers, as well as the specific differences and determination methods from C1 class circuit breakers; GB 1984-2003
. The requirements for auxiliary equipment have been added with the requirements for the continuity and timing of the action of the brushless release: "multiple releases", "action limit of releases", "power consumption of releases" and "integrated relays of self-tripping circuit breakers" have been added; the content of "low pressure and high force locking device" has been revised: "position indication", "protection level of enclosure", "creepage distance", "gas and vacuum sealing", "liquid sealing", "flammability" and "electromagnetic compatibility" have been added, and the requirements of "static tension requirements for circuit breakers", "safety signs", "replaceability", "requirements for maintenance and installation", "requirements for circuit breaker structure", "lubrication", "requirements for insulators" and "operating mechanism" in GB1984-1989 have been removed. The requirements for the synchronicity of each pole are stipulated as one-quarter cycle (5ms) of the rated frequency, one-sixth cycle (10ms) of the rated frequency and one-third cycle (20ms) of the rated frequency. 3.33ms) and one eighth cycle (2.5ms): 1. The added type test items include: electrical life test, extended mechanical life test, single-phase and out-of-phase ground fault test, EMC test and protection level verification;
1. Added "Grouping of test products", "Confirmation of test products" and "Information included in the test report" and other contents; -- Added "Electrical test as status check" and gave specific parameter requirements: 1. Added reference mechanical stroke characteristics (6,101.1. 1) In the opening and closing and opening and closing tests, the test procedures and arcing time difference are clarified, and the concept of "opening window" is proposed: - Supplement the content of "invalid test (6.105.5)": the procedures and requirements of the capacitive current opening and closing test are equivalent to 1EC62271-100 (reference ANSI/IEEEC37.012) - Add "Safety (Chapter 11)": The content of GB1984-1989 is edited and adjusted to Chapter 8 of the text; - Add GB/T 4474 as the content of Appendix A: Add Appendix B (Editorial Adjustment):
I. Informative Appendix G, Appendix H, Appendix I, Appendix K and References: --- Removed Appendix EL in GB [984-1989 has been systematically adjusted to B/T11022-199 (similar to IEC60694:1996) and Appendix F editorially adjusted to Chapter 10 of the standard text): The arrangement of chapters and clauses in this standard is consistent with IEC62271-100, 2001, and the content of most clauses is the same as IEC62271-100:20091. The differences have been explained in the main differences. This standard should be used with GB/T 11022 issued in 1999. Unless otherwise specified in this standard, this standard refers to GB13/T11022. In order to simplify the expression of the same requirements, the chapter numbers of this standard are the same as those used in (B/T11022). The supplements to the contents of these chapters are given under the same reference title, and the additional clauses are numbered starting from 11: Appendix A, Appendix B, Appendix C, Appendix D, Appendix E and Appendix F of this standard are normative appendices, and Appendix G, Appendix H, Appendix I, Appendix I and Appendix K are informative appendices. This standard will take effect from the date of implementation. The same appendix replaces GH1984-1989, GH/T4474-1992 and GB/T7675-1987. This standard is proposed by the China Ground Equipment Industry Association. This standard is under the jurisdiction of the National High Voltage Switchgear Standardization Technical Committee. The National High Voltage Switchgear Standardization Technical Committee is responsible for the interpretation of this standard. This standard is issued by the National High Voltage Switchgear Standardization Technical Committee. The issuing unit of this standard is:
Responsible unit: Xi'an Commercial Voltage Electrical Equipment Research Institute, Enwen, Li Peng, Yan Yulin, Zhou Huigao, Qi Zhongyi, Zhang Wenbing, participating units : High Voltage Switchgear Research Institute of Electric Power Research Institute: Wang Dalu, Cui Jingshou. Beijing Beikai Electric Co., Ltd.: Lu Guoping. Shenyang High Voltage Switchgear Co., Ltd.: Yang Dakun, Zhang Mei, Ping Gushan Tianying Group Co., Ltd.: Yue Guanwang. Xi'an Commercial Voltage Switchgear Factory: Qu Tianyu, Gong Xiaofeng. Shanghai Huatong Switchgear: Shi Wenyao.
Shaanxi Baoguang Vacuum Electric Co., Ltd.: Wang Dianjie. Hubei Switchgear Factory: Li Jiaxing.
Northwest Electric Power Test Research Institute Institute of Electrical Engineering, Li Pinde. Northeast Electric Power Administration: Yu Bo. North China Electric Power Administration: Zhu Hongxu. Guangdong Electric Power Administration: Zhu Genliang, Fuzhou No. 1 Switch Factory: Ma Yarui, Zhuang Desen. Ningbo Tianan Group Co., Ltd.: Liu Xiaochun. The main drafters of this standard: Tian Yuwen, Li Gou, Yan Yulin. The previous versions of the standards replaced by this standard are: -GB19841980, GB1984—1989: -GB 4474--1984, GB/T 4474- 1992:—GB/T7675-1987.
GB1984-2003
1 Overview
1.1 Scope
Commercial voltage AC circuit breakers
GB1984--2003
This standard applies to commercial voltage AC circuit breakers designed for installation indoors or outdoors and operating at a frequency of 50 Hz and a voltage of 3 000 V or above.
This standard applies only to three-pole circuit breakers for three-phase systems and single-pole circuit breakers for single-phase systems. Two-pole circuit breakers for single-phase systems and for frequencies below 50 Hz shall be subject to agreement between the manufacturer and the user. This standard also applies to circuit-breaker operating mechanisms and their auxiliary equipment. However, this standard does not cover circuit-breakers with a manual closing mechanism alone, since it is not possible to specify the rated short-circuit making current and, from a safety point of view, such manual operation is not recommended.
This standard does not cover circuit-breakers for mobile power stations used in electric traction equipment. They are covered by IEC 60077 [4]. Generator circuit breakers installed between the generator and the step-up transformer are also not covered by this standard. Switching of inductive loads is covered by IEC 61233. Circuit-breakers with a predetermined inter-pole phase difference, other than circuit-breakers with automatic reclosing, are not covered by this standard. This standard does not cover self-tripping circuit breakers with mechanical tripping devices or devices that cannot fail. Bypass circuit breakers connected in parallel with line series capacitors and their protection devices are not included in the scope of this standard; they are covered in IEC 60143-2 [6]. Tests to verify performance under various abnormal conditions shall be based on agreement between the manufacturer and the user. These abnormal conditions are: voltages higher than the rated voltage of the circuit breaker may occur due to sudden loss of load on long lines or cables. 1.2 Normative references The following documents contain clauses that, through reference in this standard, become clauses of this standard. For dated references, all subsequent amendments (excluding errata) or revisions to such documents do not apply to this standard; however, parties to agreements based on this standard are encouraged to investigate whether the latest versions of these documents can be used. For undated references, the latest versions of such documents apply. GB/T311.2-2002 Insulation coordination Part 2: Insulation coordination guidelines for high-voltage power transmission and transformation equipment (eqvIEC71-2: 1996)
GB/T762-1996 Standard current (eyvIEC60059) GB1985-1989 AC commercial voltage disconnectors and earthing switches (1eIEC60129: 1984) GB2536-1990 Transformer oil (neyIEC60296, 1982) GB/T2900.20-1994 Electrical terminology High-voltage switchgear (negIEC60050) GB/T2900.50--1998 Electrical terminology General terminology for power generation, transmission and distribution ne91EC:60050 (601) : 1985] GB/T4109-1999 Technical conditions for high-voltage bushings (e9yIEC60137: 1995) GB1208-1993 Protection grade of enclosure (IP code) (eqvIEC60529: 1989) GH/T4473-1996 Synthetic test of AC high-voltage circuit breakers (neIEC60427: 1990) GB/T8905-1996 Gas management and inspection guidelines for sulfur hexafluoride electrical equipment (neqIEC60480: 1974, neqIEC60326: 19713
GB/T110221199 Common technical requirements for high-voltage switchgear and control equipment standards (egvIFC: 60694: 1996) GB 120221989 Industrial hexafluoride bowl (neqIEC 60376:1971, 376A, 1973 and 376H:1974) GB/T14598.7-1995 Other definite time and self-definite time single input excitation measuring relay (idtIEC60255-3:1989) GB16927 (all parts) High voltage test technology [eqvIEC60060 (all parts) E
GB 1984-2003
IEC60050(604):1987 Generation, transmission and distribution: - Operation High voltage AC circuit breakers - Switching of loads with filter IEC61233:1994
IFC61633:1995
High voltage AC circuit breakers - Short circuit and switching test procedures for metal enclosed and floor-standing tank circuit breakers IEC61634:1995 High voltage AC circuit breakers - Use and handling of sulfur hexafluoride in high voltage switchgear and controlgear IEC62215 High voltage AC circuit breakers - Asymmetrical short circuit breaking test method T100a 2 Normal and special conditions of use
Chapter 2 of GB/T 11022-1999 applies. 3 Terms and definitions
For this standard, GB/T 2900.20 and GB/T 11022 The definitions in 3.1.101 apply. For ease of use, some of them are listed below. The additional definitions are classified.
General terms
3.1.101
Switchgear and controlgear The combination of switches and related control, measuring, protective and regulating equipment, and the general term for the assembly of these devices and equipment with related electrical connection accessories, housings and supports. 3.1.102
Indoor switchgear and controlgear indoorswitchgearandcontrolgear Switchgear and controlgear designed to be installed only in buildings or other shelters, where the switchgear and controlgear can be protected from wind, rain, snow, abnormal dust deposition, abnormal condensation, ice and frost, etc. 3.1.103
Outdoor switchgear and controlgear
Outdoor swilchgear and controlgear is suitable for switchgear and controlgear installed in the open air, that is, it can withstand the effects of wind, rain, snow, condensed dust, ice and hoarfrost.
Short-circuit currentGR/T 2900. 20—1994 2.913.1.105
Isolated neutral system[GB/T 2900, 20—1994 2.30]3.1.106
(Neutral) fixed earthing systemsolidlyearthed (neutral) systemA system with a neutral point and grounding.
(Neutral) impedance grounding system
resonant earthed (neutral) system A system in which the neutral point is grounded by an impedance to limit the ground fault current. 3. 1. 108
(Neutral) resonant grounding system, arc-suppression-coil-earth (neutral) system - A system in which one or more neutral points are grounded by a reactance that can approximately compensate for the permeable component of the single-phase ground fault current. 2
earth fault factor GB 1984--2003
At a selected location (usually the installation location of the equipment) of a two-phase system and a given system structure, the ratio of the highest relative-to-earth power-frequency voltage effective value of the healthy phase to the relative-to-earth power-frequency voltage effective value when there is no fault at the selected location (usually the installation location of the equipment) of the two-phase system.
Note 1: This coefficient is a pure digital gain ratio (passband greater than 1) and generally characterizes the grounding condition of the system observed from the selected location and has nothing to do with the actual operating voltage at the selected location. The "ground fault factor" is the product of the "ground factor" used in the past and . Note 2: The ground fault factor is calculated from the phase sequence impedance component of the system observed at the selected location. For rotating machines, the transient reactance is used. Note 3: For all stable system structures, if its zero sequence reactance is less than 3 times the positive sequence reactance and the zero sequence resistance does not exceed the positive sequence reactance, the ground fault factor does not exceed 1.4.
Ambient air temperature The air temperature surrounding the entire switchgear or fuse determined under specified conditions. Note: For non-closing devices or fuses installed in an enclosure, it refers to the air temperature outside the enclosure. 3. 1. 111
Temperature rise (of a part uf a circuit breaker) The difference between the component temperature and the ambient air temperature. 3. 1.112
single capacitor bankA group of capacitors in parallel whose inrush current is limited by the inductance of the power system and the capacitance of the capacitor bank being charged, and where no other capacitors are connected in parallel in close enough proximity to significantly increase the inrush current. 3.1.113
Multiple (parailel) capacitor banksMultiple (parailel) capacitor banksA group of capacitors or capacitor combinations in parallel whose individual units can be independently switched in and out of the power system, and where the capacitors already connected to the power supply can significantly increase the inrush current of the other units. 3.1.114
Overvoltage (in a system)Overvoltage (in a system)A voltage between phases or phases whose peak value exceeds the peak value corresponding to the highest voltage of the equipment. [IEV604-03-09, modified 3. t. 115
out-of-phase conditions abnormal circuit conditions in which there is loss of or lack of synchronization between two parts of the power system on either side of the circuit breaker, and at the moment of circuit breaker operation, the phase angle between the rotating vectors representing the voltages generated on both sides exceeds the normal value and may reach 180° (opposite phase). 3. 1. 116
out-of-phase (as the leading edge of the characteristic parameter) out-of-phase (asprefixtoacharacieristicquanlity) restrictive term. Indicates the characteristic parameter applicable to the operation of the circuit breaker under out-of-phase conditions. 3. 1. 117
unit testanit test
test performed on one or a group of closing or breaking units, whose closing current and breaking current are the specified values for the circuit breaker full pole test: whose external voltage or recovery voltage is the appropriate part of the specified value for the circuit breaker full pole test. 3. 1. 118
Half-wave loep
The portion of the current wave contained by two consecutive current zero points. 3
GB 1984—2003
Note: The difference between a large half-wave and a small half-wave depends on whether the time interval between two consecutive current zero points is longer or shorter than the half-cycle of the alternating current. 3. 1. 119
Short-line fault [sI,F) short-line fault (si,F”) A short circuit on an overhead line that is short but still a certain distance from the circuit breaker terminals. Note: As a rule, this distance should not exceed several kilometers. 3. 1. 120
Power factor (of a circuit) power factor (of a circuit) The ratio of resistance to impedance at power frequency assuming an equivalent circuit consisting of an inductor and a resistor in series. 3. 1. 121
External insulationexternalInsulation
The distance between the equipment in the air and the distance between the solid insulation and the air contact surface: they carry the voltage and are affected by the atmosphere and other external conditions such as pollution, moisture, insects, etc. [IEV604-03-02. Modification] 3. 1.122
Internal insulationinternal insulationinternal insulationinternal insulation
The solid or gas insulation part inside the equipment, which is not affected by the atmosphere and other external conditions. 3..1.123
Self-restoring insulationself-restoring insulationInsulation that can fully restore its insulation properties after destructive discharge. 3.1.124
non-self restoring insulationNon-self-restoring insulation
Insulation that loses its insulation properties or cannot fully restore its insulation properties after destructive discharge. 3.1.125
disroptive discharge is a phenomenon associated with insulation failure under the action of voltage, in which the discharge completely bridges the test insulation and the voltage between the electrodes is reduced to zero or close to zero.
Note 1: This term applies to discharges in solid, liquid and gaseous dielectrics and their combinations. Note 2: Destructive discharges in solid dielectrics also lead to permanent loss of dielectric strength (non-recoverable insulation); in liquid or gaseous dielectrics, the loss of dielectric strength may be only temporary (self-recovering insulation). Note 3: When destructive discharges occur in gaseous or liquid dielectrics, the term "spark discharge" is used. When destructive discharges occur on the surface of a solid dielectric in a gas or liquid, the term "flashover" is used. When destructive discharges pass through the surrounding dielectric, the term "breakdown" is used. 3.1 .126
Non-sustained disruptive discharge Ns) non-sustained disruptive discharge (NsvD) Destructive discharge between contacts of vacuum circuit breaker during power frequency recovery voltage phase. Resulting in high-frequency current associated with stray capacitance near the break.
Note: After one or several half-zeta high-frequency currents, the non-sustained destructive discharge is disconnected. 3.1.127
Restrike performance
Restrike performance
The expected probability of restrike during capacitive current interruption as confirmed by the type test specified in 3.1.127. Note: The probability of a specific value is not applicable during the entire service life of the circuit breaker! 3.2
Assemblies
No special definition.
Parts of assembly
parls of assemhlies1.123
self-restoring insulation insulation that fully recovers its insulating properties after a destructive discharge. 3.1.124
non-self restoring insulation insulation that loses its insulating properties or does not fully recover its insulating properties after a destructive discharge. 3.1.125
disroptive discharge phenomenon associated with insulation failure under voltage, in which the discharge completely bridges the test insulation and the voltage between the electrodes is reduced to zero or close to zero.
Note 1: This term applies to spark discharges in solid, liquid and gaseous dielectrics and their combinations. Note 2: In solid dielectrics, spark discharges also lead to permanent loss of dielectric strength (non-self restoring insulation); in liquid or gaseous dielectrics, the loss of dielectric strength may be only temporary (self-restoring insulation). Note 3: When spark discharges occur in gaseous or liquid dielectrics, the term "spark discharge" is used. When a destructive discharge occurs on a solid surface in a gas or liquid, the term "flashover" is used. When a destructive discharge passes through the surrounding dielectric, the term "breakdown" is used. 3.1.126 Non-sustained disruptive discharge (NsvD) A destructive discharge between the contacts of a vacuum circuit breaker during the power frequency recovery voltage phase. This causes a high-frequency current to flow in relation to the stray capacitance adjacent to the break.
Note: After one or more half-waves of high-frequency current, a non-sustained disruptive discharge is interrupted. 3.1.127 Restrike performance The expected probability of restrike during the interruption of capacitive currents as demonstrated by the type tests specified in 3.1.127 Restrike performance The expected probability of restrike during the interruption of capacitive currents as demonstrated by the type tests specified in 3.1.127 Restrike performance The probability of restrike during the interruption of capacitive currents as demonstrated by the type tests specified in 3.1.127 Restrike performance The probability of restrike during the entire service life of the circuit breaker is not applicable! 3.2 Assemblies No specific definition.
Parts of the device
parls of assemhlies1.123
self-restoring insulation insulation that fully recovers its insulating properties after a destructive discharge. 3.1.124
non-self restoring insulation insulation that loses its insulating properties or does not fully recover its insulating properties after a destructive discharge. 3.1.125
disroptive discharge phenomenon associated with insulation failure under voltage, in which the discharge completely bridges the test insulation and the voltage between the electrodes is reduced to zero or close to zero.
Note 1: This term applies to spark discharges in solid, liquid and gaseous dielectrics and their combinations. Note 2: In solid dielectrics, spark discharges also lead to permanent loss of dielectric strength (non-self restoring insulation); in liquid or gaseous dielectrics, the loss of dielectric strength may be only temporary (self-restoring insulation). Note 3: When spark discharges occur in gaseous or liquid dielectrics, the term "spark discharge" is used. When a destructive discharge occurs on a solid surface in a gas or liquid, the term "flashover" is used. When a destructive discharge passes through the surrounding dielectric, the term "breakdown" is used. 3.1.126 Non-sustained disruptive discharge (NsvD) A destructive discharge between the contacts of a vacuum circuit breaker during the power frequency recovery voltage phase. This causes a high-frequency current to flow in relation to the stray capacitance adjacent to the break.
Note: After one or more half-waves of high-frequency current, a non-sustained disruptive discharge is interrupted. 3.1.127 Restrike performance The expected probability of restrike during the interruption of capacitive currents as demonstrated by the type tests specified in 3.1.127 Restrike performance The expected probability of restrike during the interruption of capacitive currents as demonstrated by the type tests specified in 3.1.127 Restrike performance The probability of restrike during the interruption of capacitive currents as demonstrated by the type tests specified in 3.1.127 Restrike performance The probability of restrike during the entire service life of the circuit breaker is not applicable! 3.2 Assemblies No specific definition.
Parts of the device
parls of assemhlies
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