GB/T 7327: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 7327-2008 | English | RFQ |
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5 days [Need to translate]
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Silicon carbide surge arresters for a.c. systems
| Obsolete |
GB/T 7327-2008
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| GB 7327-1987 | English | RFQ |
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6 days [Need to translate]
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Silicon carbide surge arresters for A. C. systems
| Obsolete |
GB 7327-1987
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PDF similar to GB/T 7327-2008
Basic data | Standard ID | GB/T 7327-2008 (GB/T7327-2008) | | Description (Translated English) | Silicon carbide surge arresters for a.c. systems | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | K49 | | Classification of International Standard | 91.120.40 | | Word Count Estimation | 26,262 | | Date of Issue | 2008-06-18 | | Date of Implementation | 2009-03-01 | | Older Standard (superseded by this standard) | GB 7327-1987 | | Quoted Standard | GB 311.1-1997; GB 311.2-2002; GB 2900.12-2008; GB 2900.19-1994; GB/T 4585-2004; GB/T 7354-2003; GB/T 11604-1989 | | Regulation (derived from) | Announcement of Newly Approved National Standards No. 10 of 2008 (total 123) | | 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 | | Summary | This standard specifies the exchange of silicon carbide valve arrester under normal conditions of use of the technical requirements, test methods and inspection rules. This standard applies to AC power system to limit over-voltage, over-voltage protection of electrical equipment from damage to the silicon carbide valve arrester. | GB/T 7327-2008: Silicon carbide surge arresters for a.c. systems---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.
Silicon carbide surge arresters for acsystems
ICS 91.120.40
K49
National Standards of People's Republic of China
Replacing GB 7327-1987
AC systems with silicon carbide surge arresters
Posted 2008-06-18
2009-03-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Table of Contents
Preface Ⅰ
1 Scope 1
2 Normative references 1
3 Terms and definitions
4 Operating Conditions 2
5 2 Technical Requirements
6 Test methods 9
7 Inspection rules 17
Appendix A (normative) Abnormal conditions arrester 20
Annex B (informative) long duration of the impulse current generator circuit 21
Annex C (informative) signs, packaging, transportation and storage 22
Foreword
This standard replaces GB 7327-1987 "AC systems with silicon carbide surge arresters."
This standard and GB 7327-1987 compared to the main changes are as follows.
--- Structures and rules are written according to GB/T 1.1-2000 "Standardization Guide Part 1. Structure and rules are written standard";
--- Added "normative references";
--- The "arrester abnormal conditions" in Appendix A;
--- The "signs, packaging, transportation and storage" section moved to Appendix C;
--- Original criteria in Appendix B, "Glossary" on the "Terms and definitions".
Appendix A of this standard is a normative appendix, Appendix B and Appendix C are informative appendices.
The standard proposed by China Electrical Equipment Industrial Association.
This standard by the National Standardization Technical Committee arrester.
This standard was drafted. Xi'an Institute of Electric Porcelain.
The main drafters of this standard. Cheng Wenyi, when Zhang Yu, Li Jian.
This standard replaces the standards previously issued as follows.
--- GB 7327-1987.
AC systems with silicon carbide surge arresters
1 Scope
This standard specifies the exchange carbide surge arresters under normal conditions of use of the technical requirements, test methods and inspection rules.
This standard applies to limit over-voltage AC power system, protect electrical equipment from overvoltage damage silicon carbide surge arresters.
2 Normative references
The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent
Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research
Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard.
GB 311.1-1997 insulation with high voltage power transmission equipment (neqIEC 60071-1.1993)
GB 311.2-2002 Insulation coordination - Part 2. insulated high voltage transmission and distribution equipment used in conjunction with guidance (IEC 60071-2.
1996, EQV)
GB 2900.12-2008 Electrotechnical terminology arresters, surge protectors and components
GB 2900.19-1994 Electrotechnical term high voltage test technique and insulation coordination (neqIEC 60071-1.1993)
GB/T 4585-2004 high-voltage insulators for ac systems - Artificial pollution tests (IEC 60507.1991, IDT)
GB/T 7354-2003 partial discharge measurements (IEC 60270.2000, IDT)
GB/T 11604-1989 high-voltage electrical equipment radio interference test method (eqv IEC 18. 1983)
3 Terms and Definitions
GB/T 2900.12-2008 and GB/T 2900.19-1994 established in the following terms and definitions apply to this standard.
3.1
Common valve arrester lightning arrester is flat plate valve clearance and composed.
3.2
Magnetic blow valve type arrester gap with magnetic blow (external magnetic field and the use of force in a magnetic field of the arc movement) and the valve arrester thereof.
3.3
It is to maintain a certain gap separation distance of two electrodes. It is a major part of the arrester. The main role is insulation, put
And electrical arcing. Under normal operating voltage, the arrester is insulated. When the system voltage reaches the discharge gap voltage discharge gap. through
It had a certain impact on current and frequency current and future frequency current first zero crossing, the voltage at the interrupter interrupter.
3.4
Frequency continuous circulation of obsolete under the influence of a magnetic field, the arc is stretched, squeezed so that the arc resistance is increased, thus limiting the power frequency freewheeling, with this original
Li called gap limiting gap.
3.5
After arrester action, the flow through the arrester frequency current, called freewheeling frequency.
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