IS 16242 : Part 3 : 2025/IEC 62040-3 : 2021 Uninterruptible Power Systems (UPS) - Part 3 Method of Specifying the Performance and Test Requirements

ICS 29.140.99; 31.080.99

ETD 31

Revised Standard from Last Update.

NATIONAL FOREWORD

This Indian Standard (Part 3) (First Revision) which is identical to IEC 62040-3 : 2021 'Uninterruptible power systems (UPS) - Part 3: Method of specifying the performance and test requirements' issued by the International Electrotechnical Commission (IEC) was adopted by the Bureau of Indian Standards on the recommendation of the Power Electronics Sectional Committee and approval of the Electrotechnical Division Council.

This standard was first published in 2014. The first revision of this standard has been undertaken to align it with the latest version of IEC 62040-3 : 2021.

This standard has been issued in several parts. Other parts in this series are:

Part 1 General and safety requirements for UPS

Part 2 Electromagnetic compatibility (EMC) requirements

This edition includes the following significant technical changes with respect to the previous edition:

a) Environmental conditions aligned with IEC 62040-1 : 2017 (UPS safety requirements);

b) Compliance requirements included in all sub-clauses referenced in Table 5 UPS test schedule;

c) Non-linear step load is no longer a type test and was removed from 6.4 in consistency with requirements for switch mode power supplies incorporating inrush current controls; this resulted in the performance classification coding being shortened from 8 to 7 characters (see 5.3.4);

d) Free-fall test aligned with ISO 4180 (see 6.5.1.3);

e) Multiple normal mode UPS test requirements introduced;

f) Non-linear load requirements relaxed in Annex E in consistency with requirements for switch mode power supplies complying with the applicable limits for harmonic current in IEC 61000-3-2 and IEC 61000-3-12; and

g) Minimum UPS efficiency values referenced in Annex I became normative and are based on active output power rating and utilisation of weighting factors rather than on allowances related to isolation transformers, input harmonic current filters and input voltages.

The text of the IEC standard has been approved as suitable for publication as an Indian Standard without deviations. Certain conventions are, however, not identical to those used in Indian Standards. Attention is particularly drawn to the following:

a) Wherever the words 'International Standard' appears referring to this standard, they should be read as 'Indian Standard'; and

b) Comma (,) has been used as a decimal marker, while in Indian Standards the current practice is to use a point (.) as the decimal marker.