GB/T 15166.4-2021High-voltage alternating-current fuses - Part 4: Fuse for exteanal protection of shunt capacitors (English PDF)

1 Scope

This document specifies the terms and definitions, normal and special use conditions, performance requirements, type tests of fuses for external protection of shunt capacitors inspection requirements:

This document applies to external fuses used in high-voltage capacitors complying with GB/T 11024:1-2019:

Note: GB/T 11024:1-2019 is applicable to both the capacitor unit used and the capacitor bank used, especially in the AC power system

For power factor compensation, it is also suitable for capacitors in power filter circuits:

This document covers the internal faults used to eliminate a single capacitor unit to allow the rest of the capacitor bank to be connected to this unit fuses that continue to operate (unit fuses); and fuses that eliminate the failure of the entire capacitor bank and isolate it from the system (line blown device): These fuses meet the requirements of this document on the basis of GB/T 15166:2-2008 or GB/T 15166:3:

This document does not cover devices that do not need to interrupt capacitive currents [such as no capacitive currents will flow, or as other devices (to interrupt capacitive currents)

The "backup" use (breaking large inductive currents)] fuses, see GB/T 15166:2-2008 or GB/T 15166:3 for their requirements:

In this document, the terms "capacitive current" and "inductive current" are used on the one hand to denote leading and lagging power factor test currents, respectively;

On the one hand, it means that the line mainly contains capacitive or inductive components: On occasions that do not necessarily require special emphasis on different meanings, this paper

The term "capacitor unit" and "capacitor bank" in the article may be replaced by the word "capacitor":

2 Normative references

The contents of the following documents constitute essential provisions of this document through normative references in the text: Among them, dated citations documents, only the version corresponding to that date applies to this document; for undated references, the latest edition (including all amendments) applies to this document:

GB/T 11024:1-2019 Shunt capacitors for AC power systems with nominal voltages above 1000V - Part 1: General (IEC 60871-1:2014, MOD)

GB/T 15166:1-2019 High Voltage AC Fuses Part 1: Terminology (IEC 60050-441:1984, MOD)

GB/T 15166:2-2008 High Voltage AC Fuses Part 2: Current-Limiting Fuses (IEC 60282-1:2005, MOD)

GB/T 15166:3 High Voltage AC Fuses Part 3: Jet Fuses (GB/T 15166:3-2008, IEC 60282-2:

1995, MOD)

3 Terms and Definitions

The terms and definitions defined in GB/T 15166:1-2019 and the following terms and definitions apply to this document:

3:1 (capacitor) element

A component consisting of a dielectric and electrodes separated by it:

[Source: GB/T 2900:16-1996, 3:1:1] […]