SN EN 60865-1 : 1993

Committees responsible
National foreword
Section 1. General
1.1 Scope and object
1.2 Normative references
1.3 Equations, symbols and units
1.4 Definitions
Section 2. The electromagnetic effect on rigid conductors
and flexible conductors
2.1 General
2.2 Rigid conductor arrangements
2.3 Flexible conductor arrangements
2.4 Structure loads due to electromagnetic effects
Section 3. The thermal effect on bare conductors and
electrical equipment
3.1 General
3.2 Calculation of temperature rise
Annexes
A. (normative) Equations for calculation of diagrams
B. (informative) Iteration-procedure for calculation
    of factor eta for the tensile force Fpi in the
    case of non-clashing bundled conductors according
    to IEC 865, 2.3.3.3 equation (62)
Tables
1. Effective distance as between sub-conductors in
     metres, for rectangular cross-section dimensions
2. Maximum possible values of Vsigma Vr, Vsigma s Vrs,
     VF Vr
3. Factors alpha, beta, and gamma for different
     busbar support arrangements
4. Factor q
5. Section moduli Z of main conductors with two or
     more stiffening elements between two adjacent
     supports
Figures
1. Factor kls for calculating the effective conductor
     distance
2. Loading direction and bending axis for multiple
     conductor arrangements
3. Factor c for the influence of connecting pieces in
     equation (17)
4. Factors VF, Vsigma and Vsigma s to be used with
     the three-phase and line-to-line short circuits
5. Factors Vr and Vrs to be used with three-phase
     automatic reclosing
6. Maximum swing out angle sigma m for a given maximum
     short-circuit duration Tk1
7. Factor psi for tensile force in flexible conductors
8. v2 as a function of v1
9. v3 . sin 180 deg/n as a function of as/ds
10. xi as a function of j and epsilon st
11a. eta as a function of j and epsilon st
11b. eta as a function of j and epsilon st
11c. eta as a function of j and epsilon st
12a. Factor m, heat dissipation due to d.c. component in
     three-phase systems and single-phase systems
12b. Factor n, heat dissipation due to a.c. component in
     three-phase systems and approximately for single-
     phase systems
13. Relation between rated short-time withstand current
     density (Tkr = 1 s) and conductor temperature

Applies to the mechanical and thermal effects of short-circuit currents. Includes the following sections: the electromagnetic effect on rigid conductors and flexible conductors; the thermal effect on bare conductors and electrical equipment. Also includes detailed tables and annexes.