GB/T 14048.23-2022Low-voltage switchgear and controlgear - Part 9-1: Active arc-fault mitigation systems - Arc quenching devices (English PDF)

1 Scope

This document applies to low-voltage arc extinguishing equipment, referred to as AQD, which eliminates low-voltage complete sets of equipment (symbol) by forming a low-impedance current loop.

arc faults in typical low-voltage switchgear and controlgear conforming to the IEC 61439 series, so that the arcing current is transferred to a new current return road. This new current loop will be maintained until the short-circuit protection device (SCPD) interrupts the short-circuit current.

These appliances are installed on the main distribution line of the low-voltage plant, preferably as close to the mains as possible.

The rated voltage does not exceed AC 1000V or DC 1500V.

This document does not include.

--- Sensors for detecting arc faults;

--- Electrical appliances for triggering the function of arc extinguishing appliances;

--- Appliances for cutting off arc fault currents;

--- Special requirements for AQD used in explosive atmospheres (eg ATEX).

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 2423.4-2008 Environmental testing of electrical and electronic products - Part 2.Test method Test Db. Alternating damp heat (12h

12h cycle) (IEC 60068-2-30.2005, IDT)

Note. GB/T 5465.1-2009 Graphical Symbols for Electrical Equipment Part 1.Overview and Classification (IEC 60417DB.2007-01, MOD);

GB/T 5465.2-2008 Graphical symbols for electrical equipment - Part 2.Graphical symbols (IEC 60417DB.2007, IDT).

trolgear-Part 1.Generalrules)

Note. GB/T 14048.1-2012 Low-voltage switchgear and control equipment - Part 1.General (IEC 60947-1.2011, MOD).

assemblies)

Note. GB/T 7251 (all parts) Low-voltage switchgear and control equipment [IEC 61439 (all parts)].

CISPR11.2019 Limits and methods of measurement of radio frequency disturbance characteristics of industrial, scientific and medical equipment (Industrial, scientific urement)

Note. GB 4824-2019 Limits and Measurement Methods of Radio Frequency Disturbance Characteristics of Industrial, Scientific and Medical Equipment (CISPR11.2016, IDT).

3 Terms and Definitions

The terms and definitions defined in IEC 60947-1.2020 and the following terms and definitions apply to this document.

GB/T 14048.5 | GB/T 14048.6 | GB 16916.1 | GB/T 14048.25 | GB/T 14048.16 | GB/Z 14048.24 | […]