Creating a One-Line Diagram Part III

Mot or Accelerat ion Analysis The purpose of this tutorial is to introduce the Motor Acceleration module of ETAP. It will show the static and dynamic models that can be used to simulate real motor characteristics. The minimum amount of data necessary to run each type of study will be entered. You will need to contact OTI with your Return Key Code so that you can activate this module. For this section of the tutorial you should select “Example Project (ANSI)” option when starting ETAP Demo. Running a Static Motor Starting Study Switch to Motor Acceleration Analysis mode by clicking on the Motor Acceleration Analysis button on the Mode toolbar. From the Study Case toolbar, open the Motor Starting Study Case editor. From here you can add and modify conditions for your study. On the Event page, change the Total Simulation Time to 10 seconds. The output plots will now graph the results of the study from time 0 to 10 seconds. Now you can add an unlimited number of events to simulate switching actions in a single Motor Starting simulation. You can start or switch off individual loads or categorized motor groups with the Action by Load and Action by Starting Category features, respectively. You can also change the operating load by clicking the Load Transitioning option to change from one loading category to another. You can add an event by selecting the Event page and clicking on the Add button under the Events heading. Actions occurring at each event time can be added, modified, or deleted by selecting the event and modifying the respective Action heading (by Element, by Starting Category, by Load Transitioning). Click OK the save the changes you made in the study case editor. Open Syn1’s editor by double-clicking on the element graphic in the OLV, and go to the Load Model page. In the Acceleration Time (Static Starting) fields, enter 1 second as the no load acceleration time, and 3 seconds as the full load acceleration time. Click OK to save and exit. The data you have just seen and changed is the minimum necessary to run a simple Static Motor Starting study. Run the study by clicking on the Run Static Motor Starting button on the Motor Starting toolbar. Note: Once the calculation has completed, plots and output reports are accessible. Running a Dynamic Motor Starting Study Now a Dynamic Motor Starting study will be performed using the same Study Case conditions and events as the Static study. However, additional data is necessary for a Dynamic Study. Double-click the Syn1 element graphic to open its editor, and go to the Model page. Under the Dynamic Model heading, a category other than “None” must be selected. Clicking on the Typical Data button will fill the necessary fields based on the ratings specified under the Nameplate page. Now go to the Load Model page to view the load model. Ensure that a Load Model is entered for this motor. If a Load Model needs to be entered, click the Load Model Lib button, and accept a Motor Load by clicking OK in the window that appears. Also, go to the Inertia page and enter 0.2 into the motor inertia (H) field, and click OK. The motor WR2 will automatically be updated. Exit the Syn1 Synchronous Motor editor by clicking OK. Now you can run a Dynamic Motor Starting study. Click the Run Dynamic Motor Starting button on the Motor Starting toolbar to perform the study. To view the plots that are generated as a result of a study, click the Motor Starting Plots button on the Motor Starting toolbar. The Motor Starting Plot Selection window will appear to allow you to choose which plots will be displayed. Select the plots you wish to view, or click OK to show all plots. The Motor Acceleration Analysis module of ETAP is an excellent tool to simulate and investigate motor acceleration scenarios. Panel Syst em s The purpose of this tutorial is to introduce the Panel Systems module of ETAP. It will be shown how to connect panels to buses and to other panels, as well as how to enter loading data into the Panel Schedule page. Note that you cannot add new panels in this demo, but you can browse the existing panels in the example project. For this section of the tutorial you should select “Example Project (ANSI)” option when starting ETAP 5.5.5 Demo. Viewing the Panel Editor ÿ Ensure that you are in Edit mode. Open the composite network Sub3 Net by doubleclicking on it. ÿ Connecting a panel to a bus is the same as with any other one-line element. The default connection pin of each panel is the top connector. Note how Panel1 is connected. ÿ Double-click Panel1 to open the Panel editor. On the Info page, notice the panel is a three-phase element. On the Rating page, you will see that the rated voltage is 0.48kV to match the connected bus voltage. ÿ On the Schedule page, the individual panel slots can be filled by clicking on the corresponding Link box, and selecting an option from the drop-down menu. If you want to connect a slot to an external element, choose one of the four Ext-X slots. Note connections #2 and #8 are designated external in the figure below. The Summary page of the Panel Schedule editor details the total loading on the panel. Adding New Panels ÿ Add two more panels to the one-line and connect one of the panels to MCC1 as shown below. In order to connect the panels together open the editor for the panel connected to MCC1. Go to the Schedule page of the editor and set the number of poles for circuit #7 to 3 and Link type to Ext-2. This allows a 3-phase load, which in this case is the other panel, to connect to the Ext-2 connection. ÿ Now you can connect the second panel to first by connecting the top pin of the second panel toExt-2 of the first panel as shown in the figure below. Running a Load Flow Analysis on Panels ÿ To perform load flow calculations on your panel system, switch to Load Flow Analysis mode, and click the Edit Study Case button on the Study Case toolbar. Check the box entitled Calc Panel Systems, and click OK to exit the study case editor. ÿ Now run a Load Flow study on your panel system in ETAP as outlined in the Load Flow Analysis tutorial. Note the power flows to and from the panels. View ing a TCC in St ar This tutorial provides a brief overview of the basic operation of the Star Protective Device Coordination module. It will cover how to create a new Star View and how to add a new device to an existing Star View. You will need to contact OTI with your Return Key Code so that you can activate this module. Creating a New Star View ÿ Start ETAP Demo and select the option “New Project” for this tutorial. ÿ Click the Edit button on the Mode toolbar. ÿ Click the Overcurrent Relay button presentation. ÿ Double-click the Overcurrent Relay element to open the Relay editor. ÿ Go to the OCR page and then click the Library button. This will display the Library Quick pick - Relay dialog box. Select manufacturer GE Multilin and model 735/737 and click OK. GE Multilin 735/737 relay data is populated in the OCR page. ÿ Set the relay as shown in the figure; ensure that ‘Link TOC + IOC for this level is checked for OC1. To learn more about relay settings, refer to the Relay section in Instrumentation Elements chapter of the User Guide or click the Help button. from Edit toolbar and drop it into the OLV1 ÿ Click the Input page. Enter primary and secondary ratings for Phase CT (800:5) and Ground CT (50:5) as shown below. CT ratios can be entered directly in the Relay Editor where no CT is connected to the relay. You will need to drop a CT into the one-line-diagram under Edit Mode and connect the Relay to the CT before running calculations but viewing a TCC curve does not require the presence of a CT. ÿ From the Mode toolbar, click the Star – Protective Device Coordination button to switch to the Star mode. ÿ To generate the Star View, select the relay, and then click the Create Star View button from the right-hand side Star Mode toolbar. ÿ This opens a new Star TCC View with the selected Relay1 curve. Star Views for other protective devices can be generated in a similar manner. Keep Star1 open for the next section of the tutorial. Right click on the label tag associated with the curve and check the Settings options. This will show more infromation related to the relay settings in the label tag. Adding a Device Curve to a Star Vi ew ÿ Switch to Edit mode and then drop a fuse into the one-line-diagram view OLV1. ÿ Double-click the fuse symbol to open the Fuse editor. Go to the Rating page and click the Library button to display the Library Quick Pick – Fuse dialog box. Select manufacturer S&C, and model SMU-20, at 27 Max. kV, with standard speed and size 13E. ÿ Switch to Star Mode using the Mode toolbar. Select Fuse1 and click on Append to Star view button to open the Star View Selection editor. Select Star1to append Fuse1 to Star1 view and click OK. ÿ Star1 view opens with the Fuse1 curve added. Element or group of elements on the one-line-diagram can be appended to one or more Star views in a similar manner. ☺Helpful Tips… A faster method to add a new device to a star view is to select the device on the one-line-diagram, hold the Shift key down, and drag it to the active Star View. The color of each TCC curve can be assigned by pressing the Plot Options button on the right hand toolbar.