ATS Data

This dialog box includes the following areas and tabs:

See Common Tabs for information on the Location, Comments, Hyperlinks, Media Gallery, or Collected Data tabs.

Figure 1: ATS Data Dialog Box

Connection Information

Option Description
ID Name

Uniquely identifies the equipment item. The program automatically assigns a name, but you can change it, if needed. The name can be up to 16 characters long.

For automatic transfer switches, the program automatically assigns the names ATS-1,ATS-2, ATS-3, and so on.

Base kV Base kV for the ATS. An ATS has three buses as shown by the nodes in the symbol. Note that the bus must have a kV entered before equipment can be connected to the bus. Anything less than 1kV is considered low voltage, anything 1kV or more is high voltage.

Specifications Tab

Option Description
Area Area numbers are used to uniquely define different areas of the electrical system. These areas can then be used for creating specific text reports from analysis operations that represent subsets of the system. For example, typical paper plant areas may be the power house (Area 1), caustic plant (Area 2), pulp mill (Area 3), and paper machine (Area 4). Area numbers are positive integers between 1 and 999.
Zone A zone number is simply a sub-area. This enables even more specific reporting. You may want to define the pulp mill as Area 3 and the digester electrical equipment as Zone 2. Specific reports can then be generated for this combination without including the entire pulp mill or the other digesters.
Device Code You can type letters or numbers to describe the device code for the equipment item. The information can be converted and printed as a QR code on arc flash labels.
Switch Type Select between automatic transfer switch or primary selector switch. This changes the symbol used on the one-line.
Source Connection Normal connection of the switch. Source 1 Bus corresponds to the bus on the left. To have the switch normally connect to the right side bus, select Source 2 Bus in the box.
ATS Model You can specify the short circuit ratings of the ATS as switch or LV circuit breakers, depending upon their construction. Selecting Edit Data opens the dialog boxes for Switch Data or LV Breaker Data.

Stability Tab

Figure 2: Stability Tab

Option Description
Enable ATS Model Select the check box to enter stability information.
Manufacturer (Mfr) Provides a list of manufacturers available in the device library. If the desired manufacturer is not listed in the device library, you can add it to the library.
Type Equipment types available from the selected manufacturer. If the desired type is not listed, you can add it to the library.
Model Equipment models available from the selected equipment type. If the desired model is not listed, you can add it to the library.
Lib Populates the table with equipment data from the library. See EasyPower Device Library for more information.

See EasyPower Device Library for more information.

Arc Flash Hazard Tab

Figure 3: Arc Flash Hazard Tab

Option Description
AF For This Bus

Specify how you would like arc flash results determined for this bus.

Calculated: When calculated is selected, Trip times for this bus and Working Distances sections become available.

    Excluded: Select to exclude the bus from arc-flash reports. Some examples of when excluded might be selected are buses that are on utility side (not worked on by company employees) but still modeled on the one-line and buses where energized work is not likely (splices).

    Forced To: When selected an additional cell will appear where you can enter the incident energy for this bus. The arc flash value incident energy entered for this bus is shown on the one-line and in the Arc Flash Hazard Report. This is typically used for buses where the NFPA-70E has stated a particular PPE level can be assumed if certain conditions exist. Particularly, 208 volt equipment fed by 125 KVA or smaller transformers.
AF Output For This Bus

This specifies whether to display results on the line side or the load side of the Main protective device of the bus equipment. If the arc flash hazards output for this bus needs to be different from the global option, use this field. The choices are:

  • <<Use Global Option>>: Use the option specified in Short Circuit Options.
  • Including Main: Always display the arc flash hazard results on the load side of the Main protective device for this bus equipment regardless of what options are selected in the Short Circuit Options.
  • Excluding Main: Always display the arc flash hazard results on the line side of the Main protective device for this bus equipment regardless of what options are selected in the Short Circuit Options.
  • Both (Incl & Excl Main): Always display the arc flash hazard results on both the line side and the load side of the Main protective device for this bus equipment regardless of what options are selected in the Short Circuit Options.
Trip Times for this Bus

Select method for determining trip times for this bus by choosing on the following:

  • Pre-defined Fixed Times: Obtains arc clearing time for the bus from the library default values. This is not the same as the trip times calculated form the TCC curves of the upstream trip device. The values stored in the library are simply predefined approximate trip times. This method is not recommended. This option is a legacy method.
  • User-defined Times: With this option you can specify the protective device clearing time for each bus. The details of arcing time for the bus can be specified in the fields – Device ID, Relay Function and Time (s). If no time is specified then the arc flash results do not appear.
  • TCC Times (Automatically Calculated): Arc flash incident energy are calculated based on time characteristic current curves specified in each protective device data dialog box.
  • User-Defined and TCC Times: Provides results for both user-defined times and TCC times as described above.
  • User-Defined One-line Device: With this option, you can specify which device you want to use for the TCC time, and the program will obtain the trip time automatically. You can select a device type (relay fuse, or low voltage breaker) and device ID. If you select a relay, you also select the relay function.
Working Distances

Specifies the working distances shown on the one-line and in the arc flash hazard report.

  • Default from Options: When selected, workings distances used are from the Default Working Distances spreadsheet in the Arc Flash Hazard Options.
  • User Specified: Selecting this option allows you to enter the working distance for this bus only.

The units displayed are based on the units selected in Arc Flash Hazard Options on the System tab.

  • For inches, the range is 1-1000.
  • For meters, the range is 0.1 to 1000.
Orientation

This is the orientation of the bus with respect to a worker that may be exposed to arc flash. This is not related to the vertical and horizontal buses in MCC and Switchgear. Arc travels away from the source and extends from the tip of the conductors. Based on the orientation of the conductors, the incident energy can vary. This choice affects the calculations factor (Cf) used in the arc flash hazard equations.

See Orientation for more information.
Labels to Print Enter the number of labels you want to print for arc flash hazard analysis. If you enter "0," no labels will print.
Comment Use to add a comment to the arc flash label.

Other Tabs

See Common Tabs for information on the Location, Comments, Hyperlinks, Media Gallery, or Collected Data tabs.

More Information

Database Technical Reference Common Tabs
EasyPower Device Library
Media Gallery  
     

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Help was last updated on 7/10/2017