ETAP Usage Overview

Introduction

• Goal: Teach how to use ETAP in 5 minutes.

Starting a Project

• Options:
  • Create a brand new project.
  • Open an existing project.

Building a Diagram

• Methods to build:
  • From scratch using toolbars.
  • Use a template with pre-built reference designs.
  • Add custom reference designs (e.g., MCC lineups, substations, wind farm collector systems).
• Ability to delete elements and restore from the recycle bin.

Quick Model Example

• Components added:
  • Relay
  • CT (Current Transformer)
  • Transformer (5 MBA)
  • Cable
  • Bus
  • Two motors.
• Diagram automatically formats according to spacing rules.
• Input missing information (e.g., impedance from ANSI/IEC).
• Cable sizing and derating functions available.

Running Calculations

• Perform Power Flow Calculation:
  • Results displayed directly on the diagram.
  • Units can be toggled (kilowatt, volts, amps, etc.).
• Short Circuit Calculation:
  • Error checking for missing data (double-click error for quick fix).
  • Fault analysis capabilities (fault a specific bus).

TCC Curve (Time-Current Characteristics)

• Process:
  • Input CT ratio and configure relay output.
  • Add a breaker without breaking connections; snap it inline.
  • Select relay model from a validated library (e.g., Schneider relay).
• Setting adjustments:
  • Change time dial and pickup, updates reflected across the database.
• Test protection by dragging and dropping the short circuit arrow.

Arc Flash Study

• Steps:
  • Select a bus for fault analysis.
  • Run arc flash study (safety checks on PPE requirements).
• Output:
  • Arcing current and arc flash energy results.
  • Access to detailed sequence of operations and arc flash analyzer.
  • Ability to print labels, work permits, and data sheets.

Conclusion

• Summary:
  • Demonstrated easy building of diagrams and calculations in ETAP from load flow to arc flash within five minutes.