GB/T 19749.4-2023Coupling capacitors and capacitor dividers - Part 4: DC or AC single-phase capacitor dividers (English PDF)

1 Scope

This document specifies the conditions of use, ratings, design requirements, test conditions, test categories, and examples of DC or AC single-phase capacitive voltage dividers:

Conduct tests, type tests, special tests and marking:

This document applies to d:c: or a:c: single-phase capacitive voltage dividers connected between line and earth for potential transformer manufacturing and other applications:

Note 1: An example diagram of a voltage divider applicable to this document is shown in Figure 4A:1 in Appendix 4A [Figure 4A:1:a) and Figure 4A:1:b)]:

Note 2: See GB/T 20840 (all parts) for complete voltage transformer requirements:

2 Normative references

The contents of the following documents constitute the essential provisions of this document through normative references in the text: Among them, dated references

For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to this document:

GB/T 19749:1-2016 Coupling Capacitors and Capacitive Dividers Part 1: General Rules (IEC 60358-1:2012, MOD)

3 Terms and Definitions

The following terms and definitions defined in GB/T 19749:1-2016 apply to this document:

The following supplementary notes are used for 3:1:6:

NOTE: For DC dividers, Um also includes harmonic peak voltages:

3:400 Definition of Voltage Divider

3:400:1 voltage divider

A device composed of resistors, inductors, capacitors, transformers, or a combination of these devices, between two points of the device can get the required

Fractional value of the applied voltage:

NOTE: In this document, a voltage divider includes a high-voltage part, an internal or external low-voltage part:

[Source: GB/T 2900:89-2012, 312-02-32, modified]

3:400:2

Rated primary voltage ratedprimaryvoltage

The primary voltage value used as a benchmark for voltage divider performance during design:

NOTE: For a voltage divider, performance is all that is related to measurement behavior such as divider ratio, accuracy, load, input voltage range, etc:

[Source: GB/T 2900:94-2015, 4:8, modified]

3:400:3

Usr

The secondary voltage value used as the performance benchmark of the voltage transformer during design: […]