New Features and Enhancements in EasyPower 10.0

The following new feature additions, enhancements and bug fixes are included in EasyPower 10.0. Follow this link for a summary of these changes as well as installation instructions.

IEC Short Circuit Enhancements and Integration with Coordination


For IEC short circuit calculations, resistances for maximum and minimum currents are based on the conductor temperatures specified in IEC-60909-0. These values are different from the ones shown in the cable data dialog boxes for positive and zero sequence resistances. The values shown are based on the conductor temperature specified in the Specifications 2 tab of the data dialog boxes and are used in ANSI short circuit, power flow, harmonics, and dynamic stability analysis.


If in Tools > Options > System, the short circuit calculation method is set to IEC 60909 and the option (under Equipment) is set to Show fields and X/R calculations based on IEC 60909, the following changes occur on the Impedance tab of the Generator Data dialog box:

Also, the X/R ratio field now appears on the Impedance tab.


For IEC, the Enclosure field has been renamed to IP Code. You can manually type text for the International Protection Code.


Short Circuit Clipping and Tick Marks in TCC Plots

Protective device time-current characteristic curves (TCC) can now be clipped at the maximum IEC short circuit current that will flow through the device. You can clip the TCC curve using one of the following currents:

For the breaking current, the default global time interval can be set in the Short Circuit Options > Control.

For individual protective devices such as relays, low voltage circuit breakers and fuses, you choose the desired breaking time from the equipment data dialog box.

When the short circuit calculations are set to IEC 60909, you can insert short circuit tick marks in the TCC for individual protective devices. You can select the check boxes for Initial, Breaking, and Steady State currents in the protective device data dialog boxes.

You can insert user-defined short circuit tick marks into a TCC based on initial, breaking, or steady state faults. You can choose the Insert SC Tick Mark command from the TCC menu or the right-click context menu, and enter the desired parameters.

The short circuit currents used for TCC clipping or tick marks are automatically adjusted based on the fault location. When you plot a TCC for the first time, all protective devices use the maximum fault current possible based on the nearest bus being faulted. When you fault individual buses, the program updates the clipping currents and the tick marks.

All protective device dialogs have been updated to show the IEC terminology.


Protective Devices

TCC Options - Short Circuit Control Tab

Remote V&I

Remote current is available in IEC short circuit. Clicking Remote V/I after a single-bus fault displays the remote currents and the remote bus voltages on the one-line. (This functionality already existed in ANSI.)

Sample Files

There is a new sample one-line for IEC named Protection-IEC.dez. This is used to provide IEC examples for the coordination tutorial. A new IEC-specific coordination tutorial is available from the Start Page.

Short Circuit (IEC) Menu

There is an IEC version of the Short Circuit menu, which includes the following options for display on the one-line:

Short Circuit Options (IEC)

There is a separate set of options for IEC when the short circuit calculation method is set to IEC 60909.

Control Tab

Text Output Tab

There are numerous reports options available for IEC in a variety of formats:

Note: For IEC Breaking HV and LV reports, if no breaking time is selected, the default is 0.1 second.

One-line Output Tab

One-line (Equipment Data) Text

One-line Symbols

2017 National Electric Code (NEC) Compliance

This release includes changes that comply with the 2017 National Electric Code (NEC) regarding 110.16(B), Arc-Flash Hazard Warning of Service Equipment.

2018 NFPA 70E Compliance

This release also includes changes that comply with the 2018 NFPA 70E standard including updates to arc flash approach boundaries, PPE levels, and the ability to display incident energy in joules/cm2. The device library has been updated to reference the new 70E tables.


In the Options > General tab, there is a new Use per phase bases for Code Factor kVA calculations check box. While performing NEC-based load calculations by load type groups, the demand factors can be applied based on total load for all phases. This is a different option from the per-phase totals, which provided conservative results.

Automatic Backups

The first time you save your one-line, a copy of the file is stored in a backup folder (Documents\EasyPower 10.0\Oneline Backups). For subsequent saves, the program makes a copy of the file in the last saved state prior to the current save. This file is stored in the same folder as the .DEZ file and has an extension of .BAK. This ensures you have backup copies of your original and last saved one-line files.

Cables, Busways, and Transmission Line Defaults

You can now specify a default style and weight for cables, busway, and transmission lines in the Default Equipment settings for each type of line. New lines are created with these default settings. The settings can be overridden on individual line items.

Chinese EasyPower Version

EasyPower is now available in a translated version for Chinese. Both the user interface and the product documentation have been translated.

Dynamic Stability

We've added several white papers for induction motors that are referenced in the dynamic stability documentation. The papers are available from the Start Page under Documents.

DXF Export

For DXF export, the output matches EasyPower's new symbols (including custom symbols) as well as text.

File Properties

Harmonics Spectra Report

The Harmonics Spectra Report now shows the frequency next to the harmonic number.


When Units on the Specification tab is set to Metric:

Media Gallery

When you double-click to open an image in the Media Gallery, the image now opens in the application you have chosen to be your image viewer for the file type. This enables you to use the functions of the image viewer as well as to simultaneously view the image while editing data in EasyPower.

Modeling Low Voltages

Equipment can now be modeled down to 1 Volt.

OnSite Enhancements

We have made improvements to the process for importing OnSite files into EasyPower one-lines, including an improved one-line layout and better equipment matching.


Equipment Tab

File Locations Tab

The File Locations tab has been reorganized to group files more appropriately.

General Tab

The check box to Graphically show incoming main on MCCs and Panels has been removed. This is now controlled by the one-line symbol customization.

System Tab

The Short Circuit Calculation Method name was changed from IEC to IEC 60909.

Power Flow

In power flow, if the transformer Unit is Metric, the primary amps are used as the rating for overload calculations. For other unit types, the secondary amps are used.


In the Relay Data dialog box for the Instantaneous setting, when the Pickup range is set to  or Disabled, the Instantaneous Delay data is now removed. This avoids the need for you to delete delay settings and prevents a warning message from appearing when you click OK in the dialog box.

Setting System Defaults During Product Activation

When you authorize EasyPower for the first time, you have the options to set your system defaults.

These can be changed later in Tools > Options System if needed.

Start Page

Title Block Templates

New title block templates are available for A4 and A3 formats.


On the Specifications tab, the Short Circuit Output options are InitialBreaking, and Steady State if the short circuit calculation method is set to IEC 60909.

Bug Fixes

The following issues are fixed in the 10.0 release: