GB/T 5169.19-2022Fire hazard testing for electric and electronic products - Part 19: Abnormal heat - Mould stress relief distortion test (English PDF)

Foreword

This document is drafted in accordance with the provisions of GB/T 1.1-2020

"Directives for standardization - Part 1: Rules for the structure and drafting of

standardizing documents".

This document is part 19 of "Fire hazard testing for electric and electronic products".

For the published parts of "Fire hazard testing for electric and electronic products", see

Appendix NA.

This document replaces GB/T 5169.19-2006 "Fire hazard testing for electric and

electronic products - Part 19: Abnormal heat - Mould stress relief distortion test".

Compared with GB/T 5169.19-2006, except for structural adjustment and editorial

changes, the main technical changes are as follows:

a) In the chapter Scope, the description of the sample passing test is supplemented

(see Chapter 1; see Chapter 1 of the 2006 edition);

b) Some terms and definitions are added (see Chapter 3);

c) A detailed description of the test device is added (see Chapter 5);

d) The test procedures are divided into two types: "Parts exposed to uniform

maximum operating temperature" and "Parts exposed to varying operating

temperatures" (see Chapter 8; see Chapter 7 of the 2006 edition);

e) The test environment for parts exposed to uniform maximum operating

temperature is changed from "in the air" to "in the oven" (see 8.2; see 7.1 of the

2006 edition);

f) Chapter 11 has been added, which gives the contents that shall be included in the

test report (see Chapter 11).

This document is identical to IEC 60695-10-3:2016 "Fire hazard test - Part 10-3:

Abnormal heat - Mould stress relief distortion test".

The following minimal editorial changes have been made to this document:

--- For purpose of the consistency with the existing standard series, the name was

changed to "Fire hazard testing for electric and electronic products - Part 19:

Abnormal heat - Mould stress relief distortion test";

--- The informative references including IEC 60050 (all parts), IEC Guide104, and

ISO/IEC Guide 51 are moved from Chapter 2 into the References;

Fire hazard testing for electric and electronic products - Part

19: Abnormal heat - Mould stress relief distortion test

1 Scope

This document specifies a mould stress relief distortion test.

This document applies to electrotechnical equipment containing parts made of

polymeric materials.

This test method is mainly used to evaluate the effect caused by the residual process

stress relief of finished moulded polymer components. Stress relief occurs when the

sample (energized or not) is exposed to a specified temperature for a certain period of

time. If the sample meets the specified test standard after conditioning at room

temperature, it is considered to have passed the test.

This document is intended for use by technical committees when preparing standards

in accordance with the principles set out in IEC Guide 104 and ISO/IEC Guide 51.

One of the tasks of technical committees is to use this series of standards wherever

applicable when preparing standards in this field. Unless specifically mentioned or

listed in the relevant standards, the requirements, test methods, or test conditions of this

document will not apply.

2 Normative references

The following documents contain the provisions which, through normative reference in

this document, constitute the essential provisions of this document. For the dated

referenced documents, only the versions with the indicated dates are applicable to this

document; for the undated referenced documents, only the latest version (including all

the amendments) is applicable to this document.

GB/T 5169.1-2015 Fire hazard testing for electric and electronic products - Part 1:

Terminology concerning fire tests (IEC 60695-4:2012, IDT)

ISO 13943:20081) Fire safety - Vocabulary

IEC 60216-4-1 Electrical insulating materials - Thermal endurance properties - Part 4-

1) Note: There is a new version ISO 13943:2017.

The oven shall be single-chamber, and its temperature difference, fluctuation, and test

temperature change shall meet the requirements of IEC 60216-4-1.

In addition, after the sample is placed into the chamber and the chamber is closed, the

temperature of the oven shall return to the specified temperature (+/-2 °C) within 5 min,

and the overshoot shall not exceed 5 °C.

6 Samples

Samples shall be determined by the relevant product specification. The preferred

sample is the complete end product. Unless otherwise stated in the relevant

specification, three samples shall be tested during the test.

7 Conditioning

Unless otherwise specified in the relevant product specification, the sample shall be

placed in a laboratory environment with a temperature of 15 degrees C~35 degrees C and relative

humidity of 75% or lower for at least 24 hours before the test.

8 Test procedure