EasyPower 10.4 Release Details

This topic describes new EasyPower features and enhancements, as well as bug fixes that are included in the release.


New release features often include changes to the database. This may affect what you see in the Database Browser and also what is included when you export data into CSV files. If your existing work processes rely on information from the database, be sure to review your processes after you update your software.

The release includes the following:

Single-Phase Modeling

EasyPower now supports single-phase modeling on the one-line. This includes:

These features and more are described below. For additional information, refer to Single-Phase Modeling (EasyPower Help Docs).

Phase Selection When Adding Items to the One-line

The Equipment Palette and the Insert tab have options to insert three-phase (3PH) or single-phase (1PH) items onto the one-line. Three-phase is the default selection.

Figure 1: Phase Selection on the Equipment Palette

Figure 2: Phase Selection on the Insert Tab

Select the phase you want before you add the item to the one-line, from three-phase (3PH) or single-phase (1PH). You can change your selection later if needed, but this ensures the items are created with the desired phase.

The program displays 1PH next to the pointer as you drag an item onto the one-line to indicate that a single-phase item is selected.

Figure 3: Single Phase Indicator Next to Pointer

Phase Connector Symbols on the One-line

The phase connector symbol appears as two diagonal slash marks below the point where the single-phase tap is made.

Figure 4: Phase Connector Symbol

You can turn the phase connector symbol visibility on or off globally in Tools > Options > One-line Symbols. See One-line Symbols Tab for more information.

The phase connector symbol is visible on one-lines, drawings, TCCs, print, and DXF outputs.

Tip: Hover the mouse pointer over the phase connector symbol to display the connection type in a tool tip.

Setting the Nominal System Voltage

Line-to-neutral voltage of three-phase distribution systems is equal to the base kV divided by √3. This table in Options on the System tab can be used to adjust the single-phase tap voltage to a nominal value. If the base kV of the three-phase equipment is not identified in this table, the line-to-neutral tap voltage of single-phase equipment defaults to the base kV divided by √3. An additional setting is provided to allow for a voltage mismatch tolerance when connecting single-phase equipment to three-phase systems.

Figure 5: Nominal System Voltage Table

Note: If you enter a line-to-line voltage on the one-line that is not specified in the table, EasyPower calculates the line-to-neutral voltage using the √3 difference. Similarly, if you enter a line-to-neutral voltage on the one-line that is not specified in the table, EasyPower calculates the line-to-line voltage using the √3 difference.

Equipment Defaults

You can specify the equipment defaults including the phase of the equipment by selecting the item from the Equipment Defaults menu under the appropriate phase, and then entering the default data you want to use. This enables you to have different default settings for three-phase and single-phase equipment.

Figure 6: Equipment Defaults

Specify Colors by Phase or Voltage Level

You can specify equipment colors based on the either the phase type or the voltage level. This is done in Tools > Options > Colors.

Figure 7: Colors Tab in System Options

You can select a specify a color for all three-phase (3PH) or single-phase (1PH) equipment on the one-line. You can also select the Show Equipment Colors Based on kV check box for each phase type to have the equipment display different colors based on voltage. You can do this for three-phase equipment, single-phase equipment, or both.

Center Tap Transformer

You can use the Center tap connection check box to make a 1PH transformer 1PH-3W at the secondary side. The transformer impedance of the LN connection is 1.5R and 1.2X when compared to the impedance of LL connection.

Figure 8: Center Tap Connection Check Box Selected on a Single-Phase Transformer

Same as Phase Option for Neutral Wire

Figure 9: Same as Phase Option for Neutral Wire

You can set the cable specifications for the neutral wire to be the same as the phase or you can modify them individually.

Single-Phase Panel Templates

There are new panel schedule templates for 2- and 3-wire panel schedules. You can set the file location for these files globally in the system Options on the File Locations tab or for individual one-lines in the File Properties on the Properties tab.

Figure 10: File Locations Tab

Figure 11: File Properties Tab

The panel schedule templates have been modified to properly display phase information for single-phase equipment.

Panel Schedule 1PH-3W Templates

The template for 1PH-3W is similar to the standard panel template, except:

Note: The 1PH-3W template is also used for 1PH-2W panels that display 2 columns.

Panel Schedule 1PH-2W Templates

The template for 1PH-2W is similar to the standard panel template, except:

Panel Schedule Variables for Single-Phase Templates

There are new panel schedule variables that support single-phase templates. The new variables use the phase number instead of the phase name and are as follows:

Note: For 3-phase panel schedule templates, these new variables replace %PhaseATotal%, %PhaseBTotal%, and %PhaseCTotal%. However, the old variables remain available in the software to support older templates.

In addition to the above, the variable %Voltage% has different behavior depending on the phase and service of the panel.

Equipment Duty for Single-Phase Devices

While performing equipment duty calculations for 1-phase devices at a 3-phase bus, you can choose to use the fault types specific to faults within the outgoing 1-phase circuit or the types of faults available for 3-phase buses.

Similarly, while performing equipment duty calculations for 1-phase devices at a 1PH-3W bus, you can choose to use the fault types specific to faults within the outgoing 1-phase circuit or the fault types available for 1PH-3W buses.

Figure 12: Short Circuit Options - Control Tab

In the Short Circuit Options dialog box on the Control tab, use the Compare 1PH Device Rating option to select which current you want to use. You can choose from the following:

The following 1-phase fault types are available:

Note: For circuits fed by a 1PH-3W service, the fault to ground can be higher than the line-to-line fault.

Phase Variable for Arc Flash Labels

There is a new variable you can use in your arc flash label designs to indicate the number of phases.

Figure 13: Number of Phases Variable for Arc Flash Labels

Number of Phases Variable for Custom Work Permits

There is a new variable for use on work permits named {{NOPH}} that you can add to custom work permit templates to display the number of phases for a bus.

Default Fault Types for Buses

In the Short Circuit Options on the Control tab, you can specify the default phases to fault in each fault type for 3-phase and single-phase buses.

Figure 14: Fault Type Options in Short Circuit

Short Circuit Report Options

There is a new option to include or exclude information about the number of phases in short circuit reports.

Figure 15: Include Number of Phases Column in Short Circuit Reports

Reports Changes to Support Single Phase

There is a new column on the Equipment Duty Report to display the number of phases when the option to display the number of phases is selected. The report header now includes fault type information for both three-phase and single-phase buses.

Figure 16: Equipment Duty Report with Number of Phases

Similarly, the Arc Flash Hazard Report also includes a column for the number of phases.

Figure 17: Arc Flash Hazard Report with Number of Phases

If the option is selected to include the number of phases on short circuit reports, the reports include a column for the number of phases, and the base kV reflects the appropriate value for the phase. This applies to both ANSI and IEC reports.

Information appears in the heading of the report to describe the fault types for three-phase and single-phase faults.

Figure 18: ANSI Short Circuit Report with Single-Phase Information

Note: If you export your report results as part of your work processes, be aware that the changes to the report could impact your process. Be sure to review any export processes to ensure they continue to work as you expect.

Voltage Mismatch Warnings

When entering an analysis focus on a one-line, the program identifies any voltage mismatches. You can ignore the warnings and continue or view the report. When viewing the report, you can double-click an item in the report to edit it.

Figure 19: Voltage Mismatch Message

Figure 20: Voltage Mismatch Error Report

Conductor Text Block Variables

There are several new text block variables for conductors (such as cables):

Use these variables to determine the number of phase conductors in a cable run per parallel path for single-phase cables. This is useful for knowing how many wires exist per circuit.

Figure 21: Conductor Text Block Variables

While we continue to support the use of the Neutral Num text block for 3-phase systems (by assigning a 0 or 3 to determine the total number of current carrying conductors), we encourage you to use the new variables to support all phase types.

TCC Scaling Based on Connection Type

There is a new check box for TCC scaling based on the connection type. This check box is available in the data dialog box of an LV breaker, fuse, relay, motor, two-winding transformer, or generator. The check box also appears on the Temporary Cable Data dialog box when you plot TCCs in the Coordination focus.

Figure 22: Connection Auto-Scale Check Box on a Low Voltage Breaker

Figure 23: Connection Auto-Scale Check Box on a Cable in Coordination

When this check box is selected, the program automatically scales the TCC curves based on the phase connection type. Traditionally, for 3PH curves in a TCC, scaling the curves based on the reference voltage is adequate. If a line-to-neutral connected 1PH device is to be plotted with an upstream 3PH device, then the LN connected 1PH curve needs to be shifted by a factor of the SQRT(3) in addition to the voltage-based scaling.

When the check box is not selected, scaling based on the phase connection type is not applied.

The check box status for individually stored TCC plots can be different. The default for new TCC plots is obtained from the database for the device.

Setting the Reference Bus for TCC Scaling

The horizontal axis of the plot has a voltage reference that includes a reference bus.

Figure 24: Reference bus in TCC plot

If there were only 3PH equipment in the TCC it would be sufficient to scale all equipment curves based on voltage only. When single-phase equipment is included, the phase connection type requires additional factors to be considered while overlaying the curves on a common plot.

In the one-line window of the left side of the TCC plot, you can right-click on the bus you want to use as the reference and select Set as Reference for TCC Scaling.

Figure 25: Set as Reference for TCC Scaling Option

This changes the reference bus and voltage and shifts the curves accordingly, as shown below.

Figure 26: Horizontal Axis and TCC Scale

Support for NFPA 70E 2021

EasyPower now supports NFPA 70E 2021 in the Advanced Arc Flash Options for shock boundaries and PPE levels. The PPE tables in the device library are updated to include the 70E 2021 PPE levels.

Figure 27: Advanced Arc Flash Options for NFPA 70E 2021

Figure 28: PPE Levels for NFPA 70E 2021 in the Device Library

The PPE Level table for 70E-2021 has been modified to a match the format of NFPA-70E table 130.5(G). The default library no longer includes the upper threshold of 40 cal/cm2 for "Danger!" level. You need to add this if it is desired. Also, the default library does not include the PPE Category based on table 130.7(C)(15)(c). You can customize the library if needed to replicate the PPE Levels.

Revit® Integrator Updates

This release includes the following updates to the Revit Integrator:

Find-Select Feature Improvements

The Find-Select feature includes usability improvements to make the feature easier to use and to provide additional functionality. See Selecting by an Item's ID Name (Find-Select) for more information.

Quantity Based Demand Factor

Load calculations now enable you to specify load categories for which the demand factors can vary with the number of items. You can define demand factors (code factors) based on the quantity in the Demand Load section of the library or in the File Properties under Code Factors.

Figure 29: Code Demand Factors in the Device Library

Figure 30: Specifying Code Factors in the File Properties

Custom Terminology for Phase Descriptions

There is a new Terminology tab in System Options where you can specify your own custom terminology for phase descriptions in EasyPower. The custom terminology is stored with the database file so that if other users open the file they see the custom terms. You can save the custom terminology as the default terms, which makes them available for use in other files.

Currently, phase descriptions are the only customizable terms, but we plan to add more functionality to this feature in the future.

Figure 31: Terminology Tab

Data Text Block 2 Added for Buses

You can now add a second data text block for buses to the one-line text template. You can use the text editor to select which additional information you want to appear in the data text block on the one-line. The text block is blank by default.

Figure 32: Creating the Contents of Data Text Block 2 for a Bus in the Text Editor

Figure 33: Data Text Block 2 on the One-line

Support for IEEE-1584-2018 in Dynamic Stability

You can now select either IEEE-1584 2018 or IEEE 1854-2002 as the arc flash standard to follow when in Dynamic Stability. The option is set in the Dynamic Stability Options dialog box on the Arc Flash tab.

Figure 34: Dynamic Stability Options - IEEE 1584-2018 Standard Selected

Figure 35: Dynamic Stability Options - IEEE 1584-2002 Standard Selected

Error Report Improvements

When EasyPower displays an error report (such as when you attempt to open the Short Circuit focus with incomplete data), you can now easily edit the item in one of three ways:

Figure 36: Context-Sensitive Menu in the Error Report

TCC Enhancements

The device library has been modified so that breakers can be modeled as follows:

Custom Shortcut Keys

If you have set up custom shortcut keys, these are preserved and no longer overwritten when upgrading the EasyPower program. Customization of the Quick Access Toolbar is also preserved.

Notes in EasyPower

Notes can now contain up to 1,000 characters.

Contacting Support

There is now a link in the program to make it easier for you to contact EasyPower technical support and to provide us with important system information to help resolve issues.

Figure 37: Support Link

When you click the link, you are given multiple support options, along with a recap of your important system and program information.

Figure 38: Contact EasyPower Technical Support Dialog Box

Bug Fixes


EasyPower 10.4 - Service Pack 2 Release Notes (

EasyPower 10.4 Service Pack 2 (SP2) includes the following bug fixes.

Arc Flash

Connection Data


Database Files


Short Circuit