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| The IEC Short-Circuit module has been designed with close consideration to all the complexities of IEC standards. ETAP automatically considers all the K correction and C factors required for adjusting the impedance of network, power station, and auxiliary system components. The module may be configured to use any of three methods for adjusting the R/X ratio for the calculation of the peak currents. In addition, the module has built-in intelligence to determine which parts of the system are considered meshed or non-meshed or which fault contributions are near or far-from-generator for calculating I”k, Idc, Ib, and Ik. The module also includes a transient short circuit analysis engine based on the IEC 60363 Standards with the capability of generating multiple plots. |
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- IEC Standards (60909, 60282, 60781, 60947)
- Transient fault analysis (IEC 61363)
- Integrates with protective device coordination
- Automatic device evaluation for 3-phase, 1-phase,
& panel systems
- User-definable voltage c factor
- Load terminal fault current reporting
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- Check making & breaking capabilities
- Check peak and Ithr (thermal withstand capability)
- Automatic handling of power station units fault adjustments
- User-specified circuit breaker time delay
- Breaking duty plotted as a function of breaker time delay
- User-selected bus faulting (graphical or tabular)
- User-definable prefault voltage C factors
- User-definable Cmax for 6% & 10% tolerance low voltage K factors
- Grounding models for motors, generators, & transformers
- Motor contribution based upon loading categories, demand factor, or both
- Option to include/exclude asynchronous motor decay for Ib
- Automatically adjust conductor resistance & length (both lines & cables)
- Global or individual device impedance tolerance adjustments (both positive & negative)
- Include/exclude fault impedance modeling for unbalanced faults
- Include/exclude shunt admittance for branches & capacitive loads (unbalanced faults)
- Phase-shifting transformers for IEC unbalanced faults
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| Standard |
Pub. Year |
Title |
IEC 62271-100
IEC 62271-200
IEC 62271-203
IEC 60282-2
IEC 61363-1
IEC 60909-0
IEC 60909-1
IEC 60909-2
IEC 60909-4
IEC 60947-1
IEC 60947-2 |
2003
2003
2003
1997
1998
2001
2002
1992
2000
2004
2003 |
High-voltage switchgear and controlgear – Part 100: High-voltage alternating-current circuit breakers
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
High-voltage switchgear and controlgear – Part 203: Gas-insulated metal-enclosed switchgear for rated voltages above 52 kV
High-voltage fuses – Part2: Expulsion fuses
Electrical installations of ships and mobile and fixed offshore units – Part 1: Procedures for calculating short-circuit currents in three-phase a.c.
Short-Circuit Currents in Three-phase a.c. systems - Part 0: Calculation of Currents (including 2002 corrigendum 1)
Short-circuit currents in three-phase a.c. systems - Part 1: Factors for the calculation of short-circuit currents according to IEC-60909-0
Electrical equipment - Data for short-circuit current calculations in accordance with IEC 909 (1988)
Short-circuit currents in three-phase a.c. systems Part 4: Examples for the calculation of short-circuit currents
Low voltage switchgear and controlgear, Part 1: General rules
Low voltage switchgear and controlgear, Part 2: Circuit breakers |
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| ANSI and IEC standards are available for calculating short circuit current for parts of the network below main panels, sub panels, UPS, and phase adapters. Device duty calculation compares the calculated fault current from these networks for evaluation of protective devices and automatically generates critical and marginal alerts based on user-defined alarm limits. |
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- Automatically flag marginal & overstressed devices
- Fault current contributions for I”k, Ip, Idc, Ib & Ik (both maximum & total)
- Phase & sequence voltage profiles (Va, Vb, Vc, V1, V2 & V0)
- Phase & sequence current profiles (Ia, Ib, Ic, I1, I2 & I0)
- Phase & sequence impedances
- User-defined fault current contribution level
- Input data, detailed contributions, & summaries
- Option to report breaking duty vs. delay time (IEC)
- State-of-the-art graphic display of results
- Export output reports to your favorite word processor
- Use Crystal Reports® for full color, customizable reports
- Alert view to display critical & marginal limit violations
- Export one-lines with results to third party CAD systems
- Transient fault (IEC 61363) plots & tabulated reports
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