ETAP Short-Circuit Analysis - ANSI & IEEE Standards

Simulation & Analysis

Short-Circuit - ANSI / IEEE

Short-Circuit - IEC

Arc Flash

Load Flow

Motor Acceleration

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Quality Assurance

ISO 9001:2000 Standard
United States Code of
Federal Regulations
10 CFR 50
10 CFR 21
ANSI/ASME N45.2
ASME NQA-1
ANSI/IEEE Std 730.1
CAN/CSA-Q396.1.2

Short-Circuit Analysis - ANSI & IEEE Standards

We take the guess-work out of short-circuit studies by automating the process with multiple calculation and result analysis tools. The Short-Circuit module makes it as easy to go from selecting elements from the comprehensive libraries of short circuit current ratings to performing dozens of different short circuit analysis with the purpose of finding the worst-case device duty. Built-in intelligence allows it to automatically apply all ANSI factors and ratios required for high, medium, and low voltage device duty evaluation. Determine fault currents and automatically compare these values against manufacturer short circuit current ratings. Overstressed device alarms are automatically displayed on the one-line diagram and reports. OTI closely monitors industry standards and OEM data to ensure ETAP is always up-to-date. The Short-Circuit module seamlessly integrates with device coordination and performs arc flash hazard calculations.

Key Features

ANSI / IEEE C37 Standards
IEEE Standards 141 & 399, UL 489
Integrates with protective device coordination
Automatic device evaluation for 3-phase, 1-phase, & panel systems
Phase-shifting transformer
Load terminal fault current reporting

Capabilities

Check momentary & interrupting device capabilities
Check closing & latching capabilities
Evaluate symmetrical or total rated circuit breakers
Determine maximum & minimum ANSI short circuit fault currents
Calculate ½ cycle, 1.5 - 4, & 30 cycle balanced & unbalanced faults
Automatic 2, 3, 5, & 8 cycle breaker comparisons
User-defined Contact Parting Time
Interrupting Duty as a function breaker contact parting time
Automatically includes No AC Decay (NACD) ratio
Generator circuit breaker handling per ANSI C37.013 1997
Automatically adjust conductor resistance & length (both lines & cables)
Global or individual device impedance tolerance adjustments for maximum & minimum fault currents
Include/exclude fault impedance modeling for unbalanced faults
Include/exclude shunt admittance for branches & capacitive loads (unbalanced faults)
Graphical or tabular bus fault selections
Automatically determine fault currents at motor terminals without the need to add additional buses (ANSI Arc Flash)
Grounding models for generators, transformers, motors & other loads
Motor contribution based on loading category, demand factor or both
Automatically apply phase shifting transformers for unbalanced faults
Execute multiple scenarios/studies at the touch of a button by using the scenario/study wizards

ANSI/IEEE Standards

Standard	Pub. Year	Title
IEEE C37.04 IEEE C37.04f IEEE C37.04g IEEE C37.04h IEEE C37.04i IEEE C37.04 IEEE C37.010 IEEE C37.010b IEEE C37.010e IEEE C37.010 IEEE C37.13 IEEE C37.013 IEEE C37.20.1 IEEE Std 399 IEEE Std 141 IEEE Std 242 UL 489_9	1979 (1988) 1990 1986 1990 1991 1999 1979, 1988, 1999 1985 1985 1999 1990 1997 1993, 2002 1990, 1997 1986, 1993, 2002 1986, 2001 1996, 2000, 2002	Standard Rating Structure for AC High-Voltage Circuit Breakers Rated on a Symmetrical Current Basis and Supplements Standard Application Guide for AC High-Voltage Circuit Breakers Rated on a Symmetrical Current Standard for Low-Voltage AC Power Circuit Breakers Used in Enclosures Standard for AC High-Voltage Generator Circuit Breakers Rated on a Symmetrical Current Basis Standard for Metal Enclosed Low-Voltage Power Circuit Breaker Switchgear Power System Analysis – the Brown Book Electric Power Distribution for Industrial Plants – the Red Book IEEE Recommended Practice for Protection and Coordination of Industrial and Commercial Power Systems - the Buff Book Standard for Safety for Molded-Case Circuit Breakers, Molded-Case Switches, and Circuit-Breaker Enclosures

Short-Circuit Device Duty Calculation & Evaluation for Single & Multi-Phase Systems, Panels, & UPS

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.

Reporting

Automatically flag marginal & critically overstressed devices
Individual fault current contributions for I_sym, I_a, & 3I₀
Phase & sequence voltage profiles (V_a, V_b, V_c, V₁, V₂ & V₀)
Phase & sequence current profiles (I_a, I_b, I_c, I₁, I₂ & I₀)
Phase & sequence impedances
Input data, detailed individual & total short circuit contributions & summaries
Enhanced state-of-the-art graphic display of results for balanced & unbalanced faults
Export output reports to your favorite word processor or spreadsheet
Full color customizable Crystal Report® viewers
Alert view to display critical & marginal limit violations
Export one-lines with short circuit results to third party CAD applications