Example 2: DC Link Inverter with a Battery Bank (UPS)

In this example, we have created a DC link inverter with a battery bank, also known as a UPS.

To view the sample and perform each analysis, open the example file DC Link Inverter with Battery Bank.dez located in your Samples directory.

Perform the following tasks:

1. Select Short Circuit to open the short circuit focus.
2. Click Momentary.
3. Double-click on the DC BUS to perform fault calculations on this bus. Note the fault current contributions from the rectifier and the battery.



Figure 2: DC Bus Fault Results

4. While still in the short circuit focus, click Fault Bus(es) to fault all the buses.



Figure 3: Fault Buses Result

5. Click SC Options, and then select the Arc Flash Hazard tab. Note the options circled below.



Figure 4: Short Circuit Options - Arc Flash Hazards Tab Options

6. Close the Short Circuit Options dialog box, and then click Arc Flash to view the arc flash hazard analysis results.



Figure 5: Arc Flash Hazard Results on the One-Line

7. Fress F8 to arrange the windows for arc flash.



Figure 6: Arc Flash Hazard Report for DC Link Inverter Example

8. In the one-line, double-click the Bypass ATS symbol. The connection switches over to the bypass mode. This is typical during a short circuit. The arc flash hazard results change at the AC OUTPUT bus.



Figure 7: Arc Flash Hazard Results for Fault Current Supplied by Bypass

Next: Example 3: Photovoltaic System

More Information

	www.easypower.com EasyPower, LLC 7730 SW Mohawk St. Tualatin, OR 97062 (503)655-5059	techsupport@easypower.com feedback@easypower.com EasyPower Version 9.7 Copyright © 1991-2016 EasyPower, LLC. All Rights Reserved. Help was last updated on 2/8/2016