Short-circuit currents - Calculation of effects - Part 2: Examples of calculation

IEC TR 60865-2:2015(E) shows the application of procedures for the calculation of mechanical and thermal effects due to short circuits as presented in IEC 60865-1. Thus, this technical report is an addition to IEC 60865-1. It does not, however, change the basis for standardized procedures given in that publication. This second edition cancels and replaces the first edition published in 1994 and constitutes a technical revision. It includes the following changes. The determinations for auto reclosure together with rigid conductors have been revised. The configurations in cases of flexible conductor arrangements have been changed. The influence of mid-span droppers to the span has been included. For vertical cable-connection the displacement and the tensile force onto the lower fixing point may be calculated now. Additional recommendations for foundation loads due to tensile forces have been added. The subclause for determination of the thermal equivalent short-circuits current has been deleted (is part of IEC 60909-0:2001 now). The standard IEC 60865-1:2011 has been reorganized and some of the symbols have been changed to follow the conceptual characteristic of international standards.

General Information

Status
Published
Publication Date
21-Apr-2015
Technical Committee
Current Stage
PPUB - Publication issued
Start Date
15-Apr-2015
Completion Date
22-Apr-2015
Ref Project

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IEC TR 60865-2
®

Edition 2.0 2015-04
TECHNICAL
REPORT



Short-circuit currents – Calculation of effects –
Part 2: Examples of calculation
IEC TR 60865-2:2015-04(en)

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IEC TR 60865-2

®


Edition 2.0 2015-04




TECHNICAL



REPORT



















Short-circuit currents – Calculation of effects –

Part 2: Examples of calculation


























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ELECTROTECHNICAL


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ICS 17.220.01; 29.240.20 ISBN 978-2-8322-2551-6



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– 2 – IEC TR 60865-2:2015 © IEC 2015
CONTENTS
FOREWORD . 5
1 Scope . 7
2 Normative references . 7
3 Symbols and units . 7
4 Example 1 – Mechanical effects on a 10 kV arrangement with single rigid
conductors . 8
4.1 General . 8
4.2 Data . 9
4.3 Normal load case: Conductor stress and forces on the supports caused by
dead load . 9
4.4 Exceptional load case: Effects of short-circuit currents .
...

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