GB/T 20840.7-2007
Instrument transformer Part 7: Electronic voltage transformers (English Version)

Standard No.

GB/T 20840.7-2007

Language

Chinese, Available in English version

Release Date

2007

Published By

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

Latest

GB/T 20840.7-2007

Scope

This part applies to newly manufactured electronic voltage transformers with analog output, which are used for electrical measuring instruments and electrical protection devices with a frequency of 15Hz to 100Hz.

GB/T 20840.7-2007 Referenced Document

• GB 1207-2006 Inductive voltage transformers
• GB 156-2003 Standard voltages
• GB 311.1-1997 Insulation co-ordination for high voltage transmission and distribution equipment
• GB 4824 Industrial,scientific and medical equipment—Radio-frequency disturbance characteristics—Limits and methods of measurement*， 2019-12-17 Update
• GB/T 11021-1989 Thermal evaluation and classification of electrical insulation
• GB/T 14047-1993 Measuring relays and protection equipment
• GB/T 14598.13-1998 Electrical disturbance tests for measuring relays and protection equipment. Part 1: 1MHz burst disturbance tests
• GB/T 14598.3-1993 Electrical relays. Part 5: Insulation tests for electrical relays
• GB/T 2900.15-1997 Electrotechnical terminology. Transformer, instrument transformer, voltage regulator and reactor
• GB/T 2900.50-1998 Electrotechnical terminology. Generation, transmission and distribution of electricity--General
• GB/T 2900.57-2002 Electrotechnical terminology--Generation,transmission and distribution of electricity--Operation
• GB/T 4365-2003 Electrotechnical terminology Electromagnetic compatibility
• GB/T 4703-2001 Capacitor voltage transformers
• GB/T 4796 Classification of environmental conditions—Environmental parameters and their severities*， 2017-12-29 Update
• GB/T 4797.1 Classification of environmental conditions.Environmental conditions appearing in nature.Temperature and humidity*， 2018-05-14 Update
• GB/T 4797.2 Classification of environmental conditions.Environmental conditions appearing in nature.Air pressure*， 2017-12-29 Update
• GB/T 4797.3 Environmental conditions appearing in nature for electric and electronic products.Living organisms*， 2014-06-24 Update
• GB/T 4797.4 Classification of environmental conditions—Environmental conditions appearing in nature—Solar radiation and temperature*， 2019-12-10 Update
• GB/T 4797.5 Classification of environmental conditions.Environmental conditions appearing in nature.Precipitation and wind*， 2017-12-29 Update
• GB/T 4797.6 Classification of environmental conditions.Environmental conditions appearing in nature.Dust, sand, salt mist*， 2013-11-12 Update
• GB/T 4797.7 Classification of environmental conditions of electric and electronic products.Environmental conditions appearing in nature.Earthquake vibration and shock*， 2008-12-30 Update
• GB/T 4797.8 Classification of environmental conditions for electric and electronic products.Environmental conditions appearing in nature.Fire exposure*， 2008-12-30 Update
• GB/T 4797.9 Classification of environmental conditions—Environmental conditions appearing in nature—Measured shock and vibration data during storage, transportation and in-use*， 2021-03-09 Update
• GB/T 4798.1 Classification of environmental conditions—Classification of groups of environmental parameters and their severities Part1:—Storage*， 2019-08-30 Update
• GB/T 4798.10 Environmental conditions existing in the application of electric and electronic products Guidance
• GB/T 4798.2 Classification of environmental conditions—Classification of groups of environmental parameters and their severities—Part 2:Transportation and handling*， 2021-05-21 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 4798.5 Environmental conditions existing in the application of electric and electronic products.Section 5: Ground vehicle installations*， 2007-07-13 Update
• GB/T 4798.6 Classification of environmental conditions.Classification of groups of environmental parameters and their severities.Ship environment*， 2012-11-05 Update
• GB/T 4798.7 Environmental conditions existing in the application of electric and electronic products.Part 7: Portable and non-stationary use*， 2007-07-13 Update
• GB/T 4798.9 Classification of environmental conditions.Classification of groups of environmental parameters and their severities.Microclimates inside products*， 2012-11-05 Update
• GB/T 5465.2 Graphical symbols for electrical equipment Part 2: Graphical symbols*， 2023-12-28 Update
• GB/T 7354-2003 Partial discharge measurements

GB/T 20840.7-2007 history

• 2007 GB/T 20840.7-2007 Instrument transformer Part 7: Electronic voltage transformers

GB/T 20840.7-2007 -All Parts