Associate a Dual Power Supply with an Equipment Item - Intergraph Smart Electrical - Help - Hexagon

Smart Electrical allows you to specify two power sources for equipment: a primary source and an alternative source.

The following item types can have a dual source power supply:

• All loads (for example, a motor fed by supplies on two separate buses).

• All converting equipment items (for example, a variable-frequency drive fed by the two secondaries of a 3-winding transformer or an uninterruptible power supply fed by a main input with battery back-up).

• All instruments and cabinets.

You can drag one of these items in the Electrical Engineer to any item that can have a single-source power supply.

1. In the Electrical Index, create the load to which you want to associate the power supplies.

2. Create two power cables to associate with the item.

3. Create two feeder branches: one for each supply, for example a generator and an off-site power supply, each attached to a bus.

4. In the Electrical Engineer, associate the load with the main supply. See Associate Electrical Equipment with Feeders.

5. Select the load and right-click.

6. On the shortcut menu, select Select Alternative Power Source.

7. On the dialog that opens, navigate to the item that you want to designate as the alternative supply. If the item is not visible in the window, select a branch and select Expand.You can also select Find to locate the item using the Find dialog.

8. Select OK to select the item as the alternative power supply. The OK button is only enabled when you select an item that is valid for use as an alternative power supply.

9. To view the load power supplies, select the load, and on the shortcut menu, select Common Properties.

10. On the Common Properties dialog for the load, select the Feeder Data tab to view details of the main power supply and select the Alternative Feeder tab to view the name of the feeder equipment used as the secondary power supply.

• In the Electrical Engineer, the software places a visual indication '(#)' beside the names of the load and the feeder cable where they appear in the alternative power supply branch.

• You can change the alternative power source by right-clicking the feeder cable in the alternative power supply branch and selecting Change Alternative Power Source.

• If the load is only connected to an alternative power source, any drag-and-drop operations that you perform in the Electrical Engineer affect the primary power source only.