MT 1 - TC 7/MT 1

IEC 61597:2021(E) which is a Technical Report provides information with regard to conductors specified in IEC 61089 and other aluminium and aluminium steel conductors. Such information includes properties of conductors and useful methods of calculation. The following chapters are included in this document.
– current carrying capacity of conductors: Calculation method and typical example
– alternating current resistance, inductive and capacitive reactances
– elongation of conductors: Thermal and stress-strain data
– conductor creep
– loss of strength of aluminium wires due to high temperatures
It is noted that this document does not discuss all theories and available methods for calculating conductor properties, but provides users with simple methods that provide acceptable accuracies.
This second edition cancels and replaces the first edition published in 1995. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) Addition of Clause 2 and Clause 3 since the “Normative references” and “Terms and definitions” clauses are mandatory elements of the text according to the new IEC template.
b) In Clause 6, addition of new kinds of aluminium alloy and aluminium clad steel and their values of temperature coefficients of resistance.
c) In Clause 6, addition of guidelines for the calculation of AC resistance taken into account hysteresis and eddy current losses.
d) In Clause 7, addition of the values of coefficient of linear expansion of aluminium alloy conductor aluminium-clad steel reinforced series.
e) Deletion of Clause 8 “Calculation of maximum conductor length on drums” in the last version.
f) Annex A, replaced by “A practical example of CCC calculation”.
g) Annex B, replaced by “Indicative conditions for CCC calculation”.

IEC TS 61586:2017 deals with the estimation of the inherent design reliability of electrical connectors through the definition and development of an appropriate accelerated testing programme. The basic intrinsic degradation mechanisms of connectors, which are those mechanisms which exist as a result of the materials and geometries chosen for the connector design, are reviewed to provide a context for the development of the desired test programme. While extrinsic degradation mechanisms may also significantly affect the performance of connectors, they vary widely by application and thus are not addressed in this document. This second edition cancels and replaces the first edition published in 1997. This edition constitutes a technical revision. The main technical changes with regard to the previous edition are as follows: A specific “basic” testing protocol is defined which utilizes a single test group subjecting connectors to multiple stresses, Additional information is provided concerning test acceleration factors, A discussion of the limitations of providing MTTF/MTBF estimates for connectors has been added and the bibliography has been expanded.

IEC/TS 62239-1:2012(E) defines the requirements for developing an Electronic Components Management Plan (ECMP) to assure customers and regulatory agencies that all of the electronic components in the equipment of the plan owner are selected and applied in controlled processes compatible with the end application and that certain technical requirements are accomplished. In general, the owners of a complete electronic components management plan are avionics equipment manufacturers. Keywords: avionics, electronic components, management

IEC 61394:2011 specifies the requirements and tests of greases designed for corrosion protection of bare overhead conductors.

ISO 13943:2008 defines terminology relating to fire safety as used in International Standards and other documents of the International Standardization Organization and the International Electrotechnical Commission.

IEC 62420:2008 specifies the electrical and mechanical characteristics of concentric lay stranded overhead electrical conductors, containing one or more self-supporting alumimium or aluminium alloy layer(s) made of combination of any of the following metal wires:
- Hand drawn aluminium as per IEC 60889, designated A1;
- aluminium alloy type A or B as per IEC 60104, designated A2 or A3;
- thermal resistant aluminium alloy as per IEC 62004, designated AT1, AT2, AT3, or AT4;
- regular strength steel as per IEC 60888, designated S1A or S1B;
- high strength steel as per IEC 60888, designated S2A or S2B;
- extra-high strength steel as per IEC 60888, designated S3A;
- aluminium-clad steel as per IEC 61232, designated 20SA, 27SA, 30SA or 40SA.

Specifies tests and requirements for sealed nickel-cadmium prismatic rechargeable single cells.

Specifies the electrical and mechanical characteristics of concentric lay, overhead conductors of wires formed or shaped before, during or after stranding, made of combinations of any of the following metal wires: a) hard aluminium as per IEC 60889 designated A1; b) hard aluminium as per IEC 60889 designated A1F wire shaped before stranding; c) hard aluminium alloy as per IEC 60104 designated A2 or A3; d) hard aluminium alloy as per IEC 60104 designated A2F or A3F shaped before stranding; e) regular strength steel, designated S1A or S1B, where A and B are zinc coating classes, corresponding respectively to classes 1 and 2; f) high strength steel, designated S2A or S2B; g) extra high strength steel, designated S3A; h) aluminium clad steel, designated SA.

Is applicable to non-interrupted creep-testing of stranded conductors for overhead lines such as those specified by IEC 61089. Procedures for interpreting the results are also included. The object of the test is principally to calculate creep for any purpose and to compare creep of different conductors.

Applicable to thermal-resistant aluminium alloy wires before stranding for manufacture of stranded conductors for overhead lines. It specifies the mechanical, electrical and thermal resistant properties of wires in the diameter range commercially available.