SHORT-CIRCUIT CURRENTS IN D.C. AUXILIARY INSTALLATIONS IN POWER PLANTS AND SUBSTATIONS - PART 2: CALCULATION OF EFFECTS
International Electrotechnical Committee
FOREWORD
1 General
1.1 Scope
1.2 Normative references
1.3 Symbols and units
1.4 Definitions
2 Electromagnetic effect on rigid conductors
2.1 General
2.2 Calculation of electromagnetic forces
2.3 Calculation of stresses in rigid conductors and
forces on supports
2.4 Design load for post insulators, their supports
and connectors
3 Thermal effect on bare conductors and electrical
equipment
3.1 General
3.2 Calculation of temperature rise
Tables
Figures
Annex A (informative) Equation for calculations of diagrams
Annex B (informative) Bibliography
Covers a method of calculating the mechanical and thermal effects on rigid conductors caused by short-circuit currents in d.c. auxiliary installations in power plants and substations. These systems could contain rectifiers in three-phase a.c. bridge connection for 50 Hz, stationary lead-acid batteries, smoothing capacitors, d.c. motors with independent excitation. Gives a method with wide application, which gives sufficiently accurate results. The method of calculating is based on substitute functions, causing approximately the same maximum stresses in the conductors and the same forces on the supports as the actual electromagnetic force.
| Document Type | Standard |
| Status | Current |
| Publisher | International Electrotechnical Committee |
| Committee | TC 73 |
