MT 11 - TC 23/MT 11

IEC TR 61916:2017(E) provides guidance on requirements and tests for subjects applicable to electrical accessories that are within the scope of IEC TC 23 and its subcommittees.
This fourth edition cancels and replaces the third edition published in 2014 and constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
a) clarification of the introduction and the scope;
b) clarification of subclause 6.3;
c) modification of Clause 7;
d) modification of Clause 10;
e) addition of Annex B for temperature selection for GWEPT.

IEC TR 61916:2014 provides guidance on requirements and tests for subjects common to TC 23 and its subcommittees by providing recommendations applicable to electrical accessories that are within the scope of TC 23 and its subcommittees. This third edition cancels and replaces the second edition published in 2009 and constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
a) Modification of "General requirements" to include standard conditions for operation in service and information on ambient temperature range for testing;
b) Replacement of Clause 14;
c) Addition of a Clause 15 in UV resistance;
d) Addition of Annex A on Material selection process.

IEC/TR 61916:2009 provides recommendations and test requirements applicable to electrical accessories. It aims to harmonize general rules for the preparation of international standards in this field. It gives to that effect recommendations which are intended to be used as a guide. The second edition cancels and replaces the first edition published in 1998 and constitutes a technical revision. The main technical changes with regard to the previous edition are as follows:
- Updated reference standards.
- Introduction of appropriate dimensioning of insulation distances criteria.
- Interpretation on glow wire test.
- Indication of standard conditions for operation in service.
- Modification of Clauses 6 and 7 by including an explanatory introduction concerning how to apply the relevant tests and a simple reference to the horizontal standard.
- Modification of Clause 12: Tolerances.