GB/T 24841-2018Technical specification for capacitor voltage transformers of 1000kV AC system (English PDF)

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009.

This standard replaces GB /Z 24841-2009 "Technical Specifications for Capacitor Voltage Transformers for 1000kV AC Systems". Compared with GB /Z 24841-2009, the main technical changes except editorial changes are as follows.

--- Some of the referenced documents have been added and revised in the normative references (see Chapter 2, Chapter 2 of the 2009 edition);

--- Definition of damage load added to terms and definitions (see Chapter 3);

--- Revised the technical parameters in the rated output (see 5.1.6, 5.1.6 of the 2009 edition);

--- Revised the technical parameters in the accuracy class (see 5.1.7, 5.1.7 of the 2009 edition);

--- Revised the technical parameters in the temperature coefficient of the capacitor divider capacitor (see 5.1.10, 5.1.10 of the 2009 edition);

--- Revised some of the technical parameters in ferromagnetic resonance (see 5.2.1, 5.2.1 of 2009 edition);

--- Added and revised some of the technical parameters of the external insulation requirements (see 5.2.10, 5.2.10 of the 2009 edition);

--- Revised the number and parameters of the pressure equalizing ring in the pressure equalization device (see 6.3, 6.3 of the 2009 edition);

--- Increased the test items in the type test (see 7.2);

--- Revised the formula for calculating the altitude correction factor (see A.1, 2009 edition of A.1);

--- Revised the temperature range in ambient temperature (see A.2, 2009 edition of A.2);

--- Added special requirements for capacitive voltage transformers that double as post insulators (see Appendix B).

1 Scope

This standard specifies the use conditions, technical parameters and performance requirements, and structural requirements of capacitive voltage transformers for 1000kV AC systems. Requirements, tests, life expectancy, packaging, transportation and storage.

This standard is applicable to 1000kV capacitive voltage transformers used in AC systems with a nominal voltage of 1000kV and a frequency of 50Hz. Selection, manufacturing, testing and acceptance.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this document. For undated references, the latest edition (including all amendments) applies to this document.

GB/T 2900.16 Electrotechnical terminology power capacitor

GB/T 2900.50 Electrotechnical terminology General term for power generation, transmission and distribution

GB/T 2900.57 Electrotechnical terminology for power generation, transmission and distribution operation

GB/T 2900.94 Electrotechnical terminology transformer

GB/T 13540 high-voltage switchgear and control equipment for seismic requirements

GB/T 19749.1 Coupling capacitors and capacitor dividers - Part 1. General

GB/T 20840.1 Transformers - Part 1. General technical requirements

GB/T 20840.5 Transformers - Part 5. Supplementary technical requirements for capacitive voltage transformers

3 Terms and definitions

GB/T 2900.16, GB/T 2900.50, GB/T 2900.57, GB/T 2900.94, GB/T 20840.1, GB/T 20840.5 And the following terms and definitions apply to this document.