GB/T 20840.1-2010
Instrument transformers-Part 1:General requirements (English Version)

Standard No.

GB/T 20840.1-2010

Language

Chinese, Available in English version

Release Date

2010

Published By

General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China

Latest

GB/T 20840.1-2010

Scope

This part of GB 20840 applies to newly manufactured analog or digital output transformers for electrical measuring instruments or electrical protection devices with a rated frequency of 15 Hz to 100 Hz. This section contains general technical requirements only. For each type of transformer, its product standard consists of this part and the relevant special technical requirements part.

GB/T 20840.1-2010 Referenced Document

• GB 311.1 Insulation co-ordination.Part 1:Definitions,principles and rules*， 2012-06-29 Update
• GB 4208 Degrees of protection provided by enclosure(IP code)
• GB 7674 Gas-insulated metal-enclosed switchgear for rated voltages of 72.5kV and above
• GB/T 11021 Electrical insulation.Thermal evaluation and designation*， 2014-05-06 Update
• GB/T 11022 Common specifications for high-voltage alternating-current switchgear and controlgear standards*， 2020-12-14 Update
• GB/T 11604 Testing procedure of radio interference generated by high voltage equipment*， 2015-09-11 Update
• GB/T 15022 Definitions and general requirements for solventless polymerisable resinous compounds used for electrical insulation
• GB/T 16927.1 High-voltage test techniques.Part 1:General definitions and test requirements*， 2011-12-30 Update
• GB/T 17623 Determination of componental contents of gases dissolved in insulating oil by gas chromatography method*， 2017-05-12 Update
• GB/T 20138-2006 Degrees of protection provided by enclosures for electrical equipment against external mechanical impacts (IK code)
• GB/T 2421.1 Environmental testing for electric and electronic products.General and guidance
• GB/T 2423.17 Environmental testing for electric and electronic products.Part 2:Test method.Test Ka:Salt mist
• GB/T 2423.23 Environmental testing.Part 2:Test methods.Test Q:Sealing*， 2013-11-12 Update
• GB/T 2423.55 Environmental testing Part 2: Test methods Test Eh: Hammer test*， 2023-09-07 Update
• GB/T 4798.3 Classification of environmental conditions—Classification of groups of environmental parameters and their severities—Part 3: Stationary use at weatherprotected locations*， 2023-05-23 Update
• GB/T 4798.4 Classification of environmental conditions—Classification of groups of environmental parameters and their severities—Part 4: Stationary use at non-weatherprotected locations*， 2023-05-23 Update
• GB/T 5169.18 Fire hazard testing for electric and electronic products.Part 18:Toxicity of fire effluent.General guidance*， 2013-12-31 Update
• GB/T 5169.2 Fire hazard testing for electric and electronic products—Part 2: Guidance for assessing the fire hazard—General guidelines*， 2021-10-11 Update
• GB/T 5169.9 Fire hazard testing for electric and electronic products—Part 9: Guidance for assessing the fire hazard—Preselection testing procedures—General guidelines*， 2021-10-11 Update
• GB/T 5465.2 Graphical symbols for electrical equipment Part 2: Graphical symbols*， 2023-12-28 Update
• GB/T 7354 High-voltage test techniques—Partial discharge measurements*， 2018-09-17 Update
• GB/T 8905 The guide for management and measuring SF<下标6> gas in electrical equipment*， 2012-11-05 Update

GB/T 20840.1-2010 history

• 2010 GB/T 20840.1-2010 Instrument transformers-Part 1:General requirements

GB/T 20840.1-2010 -All Parts