General

To set coordination options, from the Coordination focus, click PDC Options. You can also access the options from within the Database Edit focus by selecting Tools > Options > Analysis Options > Coordination.

Figure 1: The General Tab on the Coordination Options Dialog Box

Option Descriptions

Option

Description

Confirm when creating blank TCC

When you plot a TCC without selecting any equipment, a blank TCC is created. This check box controls whether a message is displayed when a blank TCC is being created.

Show Title Block on new TCCs

Show or hide the TCC title block while creating a new TCC. After the TCC is created, you can select to show or hide the title block using the Title Block check box on the TCC tab.

Enable multiple TCC windows

When this option is selected, you can create multiple TCC windows. When this option is not selected, creating a new TCC closes the previously opened TCC window. Before closing the previously open TCC, you are asked if you want to store the TCC.

Synch TCC one-line colors to TCC curve colors

When this option is selected, the protective device symbols on the one-line window have the same color as the corresponding curves in the TCC window.

See Syncing TCC One-line Colors to TCC Curve Colors for more information.

Show cable ampacity tick marks

When this option is selected, a tick mark is placed at the top of the TCC to indicate the ampacity of the cable.

Show series coordination table tick marks

When this option is selected, a tick mark is placed on the TCC at the amp value up to which a pair of protective devices (typically LV breakers) are selectively coordinated as per tables published by manufacturers.

Show unrestrained curves on TCC create

When this option is selected, TCC curves plot unrestrained ZSI curves. The ZSI state reflects these settings when a subsequent fault is performed.

When it is not selected (which is the default setting), the initial TCC plot shows the restrained delay for short time and ground. After you fault a single bus, it simulates an unrestrained delay for the most downstream breaker, and a restrained delay for the upstream breakers.

Blank TCC Settings

Sets the default base voltage for calculating current on the new blank TCC.

Default One-line Box Position

Sets the location of the one-line box on the lower left or upper right corner of the TCC plot area when making a new TCC plot.

Default TCC Short Circuit Currents

: The short circuit currents used in the TCC can be calculated from short circuit or user-specified.

  • User Specified: You must enter the short circuit current in the Short Circuit tab of the device data dialog box or the temporary data dialog box of the protective device to use TCC clipping or to show the tick mark on the TCC plot.
  • Calculated from SC: EasyPower calculates the maximum fault current that may pass through the protective device. The selection for TCC Short Circuit (SC) Currents can also be made in the TCC Options dialog box.

Sequence of Events Display

Select to either show the absolute trip times or the trip time difference from the next downstream device for a faulted bus on the one-line. (ANSI only.)

Create Sequence of Events Report

When selected, this creates the Sequence of Events report when a bus is faulted in the Coordination focus. (ANSI only.)

More Information