NB/T 42049-2015Metal-oxide surge arresters without gaps for DC systems of 3 kV and below (English PDF)
3kV及以下直流系统用无间隙金属氧化物避雷器
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Issued by
NEA
Level / Type
Industry · Recommended
Issue date
April 2, 2015
Implementation date
September 1, 2015
Scope
NB/T 42049-2015 is the English-translated version of 3kV及以下直流系统用无间隙金属氧化物避雷器.
NB/T 42049-2015 is the recommended Chinese energy industry standard for gapless metal-oxide surge arresters on DC systems of 3 kV and below. It fixes the technical requirements, the test methods and the inspection rules for porcelain-housed and composite-housed gapless metal-oxide DC surge arresters of rated voltage 4.8 kV and below.
It is written for DC systems of 3 kV and under, where these arresters protect traction motors and other electrical equipment from overvoltage damage. It carries Chinese classification K49 and international classification 29.080.99.
Cited standards include GB 11032-2010, GB/T 775.1-2006, GB/T 775.3-2006, GB/T 999-2008, GB/T 7354, GB/T 16927.1-2011, GB/T 16927.2-2013, GB/T 23752-2009 and JB/T 7618-2011. Issued on 2 April 2015, it has applied since 1 September 2015.
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Document preview — NB/T 42049-2015
National Standard of the People's Republic of China
- ICS
- 29.080.99
Issued by: National Energy Administration of the People's Republic of China
Contents
- Foreword
- Scope
- Normative references
- About this standard
- Classification and status
1 Foreword
NB/T 42049-2015 was issued by NEA on 2 April 2015 and has been in force since 1 September 2015.
2 Scope
This standard is the recommended Chinese energy industry standard for gapless metal-oxide surge arresters on DC systems of 3 kV and below. It fixes the technical requirements, the test methods and the inspection rules for porcelain-housed and composite-housed gapless metal-oxide DC surge arresters of rated voltage 4.8 kV and below. It is written for DC systems of 3 kV and under, where these arresters protect traction motors and other electrical equipment from overvoltage damage. It carries Chinese classification K49 and international classification 29.080.99. Cited standards include GB 11032-2010, GB/T 775.1-2006, GB/T 775.3-2006, GB/T 999-2008, GB/T 7354, GB/T 16927.1-2011, GB/T 16927.2-2013, GB/T 23752-2009 and JB/T 7618-2011.
3 Normative references
NB/T 42049-2015 cites the following standards, which apply in full or in part through the references made to them in its clauses.
GB 11032-2010
GB/T 191-2008
GB/T 775.1-2006
GB/T 775.3-2006
GB/T 999-2008
GB/T 2900.12
GB/T 2900.19
GB/T 7354
GB/T 16927.1-2011 — High-voltage test techniques -- Part 1: General definitions and test requirements
GB/T 16927.2-2013 — High-voltage test techniques -- Part 2: Measuring systems
GB/T 23752-2009 — Hollow pressurized and unpressurized ceramic and glass insulators for use in electrical equipment with rated voltages greater than 1 000 V
JB/T 7618-2011 — Sealing tests of surge arresters
JB/T 9673
4 About this standard
Issued by: NEA
English translation: about 15 pages
5 Classification and status
International classification (ICS): 29.080.99
Prefix NB/T: recommended standard.
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
Referenced standards
Normative references
- GB/T 191-2008Graphical symbols marking for handling and storage of packages
- GB/T 999-2008Voltage ratings of DC electric traction system
- GB/T 2900.12Electrotechnical terminology - surge arresters,low-voltage surge protective devices and components
- GB/T 2900.19Electrotechnical terminology - High-voltage test technique and insulation co-ordination
- GB/T 7354High-voltage test techniques -- Partial discharge measurements
- GB/T 16927.1-2011High-voltage test techniques -- Part 1: General definitions and test requirements
GB 11032-2010 · GB/T 775.1-2006 · GB/T 775.3-2006
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Related Standards
GB/T 16927.1-2011 — High-voltage test techniques -- Part 1: General definitions and test requirements
GB/T 16927.2-2013 — High-voltage test techniques -- Part 2: Measuring systems
GB/T 23752-2009 — Hollow pressurized and unpressurized ceramic and glass insulators for use in electrical equipment with rated voltages greater than 1 000 V
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NB/T 42049-2015
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