IEC 60909 Standard

Short Circuit IEC 60909 Standard

ETAP Short Circuit Analysis complies with IEC 60909 standard, which classifies short-circuit currents according to their magnitudes (maximum and minimum) and fault distances from generators. Maximum short-circuit currents determine equipment ratings, while minimum currents dictate protective device settings.

Key Features

1-pole / 2-pole short circuit device duty for single-phase panel / UPS systems
Unbalanced L-G, L-L, & L-L-G fault current analysis
Short circuit study calculations based on IEC 60909, 60282, 60781 & 60947
Compares protective device ratings with calculated short circuit values
User-definable voltage C factor
Service or ultimate short circuit current ratings for LVCB breaking capability
User-definable R/X adjustment methods for Ip (method A, B, or C)
Phase-shifting transformers
Negative or positive impedance adjustments for max/min sub-transient & steady-state currents
Automatic application of K correction factors (i.e., KT, KG, KSO)
Automatically determines meshed & non-meshed networks for calculating Ib, Ik, & Idc
Considers both near & far short circuit current from generators
Detailed IEC device duty reports & complete contributions for unbalanced faults

Integrates with protective device coordination
Load terminal short circuit calculation
Ib for meshed network is adjusted by individual machine contributions for improved accuracy
Wind Power Station Units
- With Asynchronous Generators
- With Doubly-Fed Asynchronous Generator
- With Full-Size Power Converter
PV Power Station Units
- With Full Size Converter

Short Circuit Standards

IEC 62271-100	High-Voltage Switchgear and Controlgear, Part 100:High-Voltage Alternating-Current Circuit Breakers
IEC 62271-200	High-Voltage Switchgear and Controlgear, Part 200: AC Metal-Enclosed Switchgear and Controlgear for Rated Voltages Above 1 kV and up to and including 52 kV
IEC 62271-203	High-Voltage Switchgear and Controlgear, Part 203: Gas-Insulated Metal-Enclosed Switchgear for Rated Voltages Above 52 kV
IEC 60282-2	High-Voltage Fuses, Part 2: Expulsion Fuses
IEC 60909-0	Short Circuit Currents in Three-Phase AC Systems, Part 0: Calculation of Currents Edition 2.0 2016-01
IEC 60909-1	Short Circuit Currents in Three-Phase AC Systems, Part 1: Factors for the Calculation of Short Circuit Currents According to IEC 60909-0
IEC 60909-2	Electrical Equipment – Data for Short Circuit Current Calculations in Accordance with IEC 909
IEC 60909-4	Short Circuit Currents in Three-Phase AC Systems, Part 4: Examples for the Calculation of Short Circuit Currents
IEC 60947-1	Low Voltage Switchgear and Controlgear, Part 1: General Rules
IEC 60947-2	Low Voltage Switchgear and Controlgear, Part 2: Circuit Breakers
IEC 61363-1	Electrical Installations of Ships and Mobile and Fixed Offshore Units, Part 1: Procedures for Calculating Short Circuit Currents in Three-Phase AC
IEC 60781	Application guide for calculation of short circuit currents in low-voltage radial systems

IEC 60909 Standard

Short Circuit﻿ IEC 60909 Standard

Key Features

Short Circuit Standards

Short Circuit IEC 60909 Standard