GB/T 44474-2024Determination of inrush current characteristics of lighting products (English PDF)

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1: Structure and drafting rules for standardization documents" Drafting.

This document is modified to adopt IEC 63129:2020 "Determination of surge current characteristics of lighting products".

The technical differences between this document and IEC 63129:2020 and their reasons are as follows.

---Change AC 230V 50/60Hz to AC 220V 50Hz to suit my country's voltage.

1 Scope

This document describes a method based on measurement and calculation to determine the surge current of single and/or multiple lighting products of the same type.

Specific characteristics of the flow. Lighting products include.

--- Light sources with integrated control devices;

---Control device;

---Lighting fixtures.

The surge current characteristics that have been determined are.

---Peak surge current;

---Surge current pulse duration.

This document applies to lighting products connected to a low voltage power grid of AC 220V 50Hz.

NOTE. In clause 6, the method applies reference values of reference (line) inductance and reference (short-circuit) peak current, which reflect the voltage at 220 VAC.

Typical situation in installation.

2 Normative references

This document has no normative references.

3 Terms and Definitions

The following terms and definitions apply to this document.

A two-terminal thyristor having substantially the same switching characteristics in the first and third quadrants of the current-voltage characteristic curve body tube.

A three-terminal thyristor having substantially the same switching characteristics in the first and third quadrants of the current-voltage characteristic.

body tube.

circuit-breaker

It can connect, carry and disconnect current under normal circuit conditions; carry the specified overcurrent within the specified time and can A mechanical switching device that connects and disconnects current under circuit conditions (such as various short-circuit conditions).

source)

A unit connected between a power source and at least one light source for providing a rated voltage or rated current to the light source, which may consist of one or more Independent components.

Note 1.The control device may include triggering, dimming, power factor correction, radio interference suppression and more control functions.