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 |
