CAPE Software

The power that protection engineers need

CAPE (Computer-Aided Protection Engineering) software is built for engineers responsible for protection of high voltage transmission systems and distribution systems within electric power utilities.

  • Detailed modeling capabilities based on a single open source database.
  • Support for analysis and simulation to solve data management issues, uncover potential network and protective device problems, and evaluate alternatives.
  • Support for networks of any size.
  • Support for setting complex modern digital relays.
  • Support for relay coordination functions and wide-area studies.
  • Ability to integrate with conventional transient stability programs to allow the kind of evaluation of wide-area control needed to avoid cascading outages and blackouts.

We believe CAPE is simply the best of its kind anywhere in the world today, whether you define "best" based on productivity improvement, ease of use, flexibility, comprehensiveness, technical detail, or price. And it is constantly improving in response to our customers' needs.

CAPE modules

Database Editor is the foundation for all CAPE functions. Offers easy transformer model building; relay, recloser, and fuse model import; data merging, and quick entry of protection data.
Short Circuit calculates any type of fault on any size system. Supports standard and customized reporting, automated fault studies, fault location analysis, and user-defined fault conditions. 

One-Line diagram One-Line Diagram supports all CAPE modules. Conduct an entire fault study from here: click on a bus, line, transformer, generator, or bus tie to apply interactive network changes, select a fault type, and immediately see the results.


One-Line Diagram for building and maintaining a system one-line diagram and display of data, short circuit results, and protection simulation responses. Direct access for opening breakers and applying faults.
Coordination Graphics displays overcurrent and distance protective device characteristics. Supports interactive contingency and fault application, graphical relay resetting, and direct resetting of relay and distribution recloser taps and test points. 
Relay Setting represents a company’s relay setting procedures as user-written macros that perform fault studies, compute raw relay settings, and select actual taps. Library of "starter macros" includes setting digital distance relays in permissive overreach transfer trip schemes, plus many more.
Relay Checking provides automated stepped-event simulation of your protection system in response to a variety of fault scenarios. This unique capability allows you to perform wide area evaluation of protection to uncover miscoordinations. Summary reports of one line per fault make it easy for you to spot trouble.
System Simulator performs single-scenario studies interactively with the one-line diagram.
Line Constants computes the self positive-sequence impedance and the self and mutual zero-sequence impedances of overhead transmission lines based on conductor and tower data.
Order Production generates data-driven reports on paper of relay settings based on taps and test points for specific locations.
Power Flow offers both Newton and Fast Decoupled solution methods. Control algorithms support tap and phase-shifting transformers, voltage control by reactive generation, switched capacitor bank operation, and area interchange control.
Short Circuit Reduction offers two types of network reduction; useful for providing reduced models for EMTP calculations, for other “non-CAPE” programs, and for sharing data with a utility's neighbors.
Settings Transfer Utilities can export settings for any group of relays to one or more Neutral Interface files; settings can be taken to the field and safely viewed and modified by the test engineer, reviewed, annotated, and saved.
Breaker Duty automates the evaluation of breaker interrupting duty following approved procedures of either the IEC or ANSI standards. Streamlines the evaluation of new and existing breakers. 
IPS-CAPE Bridge provides two-way data exchange between the IPS-RELEX protection system data management software and the CAPE protection system simulation environment. The Bridge manages the mapping of data common to both products in a way that preserves data integrity throughout.  Depending on the transfer the user requests, it can create new substations, LZOPs, relays, and relay settings in the destination database or simply update them if they already exist.
CAPE-TS Link™ . This unique simulation tool integrates CAPE's protection data with time-domain transient stability programs. It enables a reliable simulation of the bulk electric power system in a way that models the effect of protective relay operations on the dynamic behavior of the system.

CAPE Wide Area Coordination Review Studies

Wide Area Coordination Review . Electrocon International has pioneered an innovative methodology to automate the wide area coordination review of a utility’s protective devices.

Hardware requirements

CAPE fits into your environment. It runs on Windows PCs running Windows 7, 8.1, or 10. It supports any Windows-compatible printer. Laser or high quality ink jet printer is recommended for clarity, detail, and speed.








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University program

Electrocon offers a program to make CAPE available at nominal cost to accredited educational institutions. If you teach engineering and your students could benefit from the use of CAPE in your courses, contact us.

university program

“Thanks for your quick response. You guys should be proud of your customer support; it is excellent.”

Jared Harris
HDR Engineering

CAPE's seriously user-friendly design

A single database serves all CAPE modules, so one consistent set of data serves many functions.

Network and protection models are built graphically for intuitive clarity.

Consistent screen interface across modules:

Standard menus

Action bar one-click selection of common functions

Data Tree access to all data

Multi-level online help:

Contextual "How Do I..."  explains the most common tasks.

"Help Topics" online access to all CAPE tutorials and manuals

Printable PDF files of all manuals on every CAPE CD.

“Forms help” from any form.

Macros to compute fault locations, relay settings, reaches of instantaneous overcurrent and distance elements, generator breaker flashover currents, state simulation data for end-to-end relay testing, and more.

Paul McGuire

Set your personal preferences:

User-definable menus and submenus, adjustable text font sizes, window pane layouts, and shortcuts.

User-definable sets of buses, lines, transformers, and protective devices for batch operations and for labor-saving macros.

Custom macros:

Enter a macro name to invoke a set of tasks to run within CAPE. Use high-level computer language commands.

Choose your own command abbreviations.

Extend any CAPE module to perform almost any task using CUPL, such as easily automating complex fault studies.