Eltechs Website

Design & Protection

Modules

Short-Circuit (ANSI/IEC)

Arc Flash

Device Coordination/Selectivity

Key Features

ANSI/IEEE & IEC Standards Transient Fault Analysis (IEC 61363)
Integrates with Arc Flash (NFPA 70E-2000)
Integrates with Device Coordination
Automatic Device Evaluation

Short Circuit Analysis

Short-Circuit Analysis

We take the guess-work out of short-circuit studies. It’s as easy as one, two, threeEWe automatically apply all ANSI or IEC factors and ratios, compare calculated duties to manufacturer published data, and provide alarms and warnings for overstressed devices. OTI closely monitors industry standards to ensure ETAP is always up-to-date. The Short-Circuit module seamlessly integrates with device coordination and Arc Flash Hazard calculations.

Capabilities

Check making & breaking capabilities
Check closing-latching & interrupting capabilities
Automatic 2,3,5, & 8 cycle breaker comparisons
User-specified contact parting time
Breaking duty as a function of breaker time delay
Interrupting duty as a function of breaker contact parting time
Automatically includes No AC Decay (NACD) ratio
Generator circuit breaker duty calculation & rating
Ith calculation & rating check (IEC)
Cable temperature adjustment
User-selected bus faulting (graphical or tabular)
Grounding models for motors, generators, & transformers
Motor contribution based upon loading categories
Fault impedance for line-to-ground faults (ANSI & IEC)
Option to report breaking duty vs. delay time (IEC)
Phase-shifting transformers for ANSI unbalanced faults

Flexible Operation

3 Phase,L-G, L-L, & L-L-G
Extract manufacturer published data from the libraries (1000s of devices
Compares device ratings with calculated short-circuit values
Automatically includes all necessary multiplying factors & ratios
Automatically adjusts device capabilities based on the nominal & prefault voltages


ANSI/IEEE Standards IEEE: C37, 141, 242, 399 UL 489-9		IEC Standards 56, 60282-1, 61363, 60781, 60909, 60947

Reporting Automatically flag marginal & overstressed devices Fault current contributions (lsym, la, & 31ø) Voltage profiles (Va, Vb, & Vc) User-defined fault current contribution level Input data, detailed contributions, & summaries Phase & sequence currents, voltages, & impedances 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
		Study Options Option to update initial conditions Phase-shifting transformers Auto-adjust LTC/regulator settings Power factor correction Saves solution control parameters for each scenario Make changes to your system & re-run studies instantly Conduct unlimited “what if” studies within one database Calculate bus voltages, currents, & power factors Bus/transformer/cable reactor overload warnings Calculate power flows Update loading for DC load flow Voltage drop calculations Five levels of automatic error checking