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IECShort circuitInternational

IEC 60909-0

Short-circuit currents in three-phase a.c. systems — Calculation of currents

The equivalent voltage source method for calculating initial symmetrical, peak, breaking and steady-state short-circuit currents, with impedance correction factors for network feeders, transformers, generators and motors.

What it covers

  • Voltage factor c
  • Equipment impedances and correction factors
  • Initial symmetrical current Ik″
  • Peak current ip (κ factor)

Used in ElecCalcPro

Not yet used by a calculator — planned for upcoming tools.

Related standards

IEC 60947-2IEC 60364-4-43

This page summarises the document; it does not reproduce it. Obtain the current edition from the publisher for design and compliance work.