The following explanation refers to the examples Configuration G of the Bus Load Configuration Examples documentation.
Smart Electrical allows you to specify two power sources for equipment: a primary source and an alternative source. When calculating a bus load summary, note the following:
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Alternative source circuit mode is automatically set to Disconnected by the software.
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Loads that are connected to circuits for which the circuit mode value is Disconnected appear in bus load summaries, but the software does not take those loads into account in the total load calculation.
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If a load is connected to a dual power source that originates from the same feeding upstream bus, the software does not count such a load twice and accounts for it correctly in load summaries and other load calculations.
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For batch load association calculations, a load connected to a circuit in Disconnected mode is only displayed in the Associated loads data window of the Bus Load Association dialog. Such a load does not appear in the Calculation results group box. There is no need to set the circuit mode as Connected or Disconnected for loads that have an alternative power source. The software automatically sets the circuit mode of these loads to Disconnected.For more information, see Using Dual Source Power Supplies and Associate a Dual Power Supply with an Equipment Item.
The following is an example of a load connected to a dual power supply where load M2 is connected to the main feeder F-11 and an alternative feeder F-12 on the same bus.
In the Electrical Engineer:
In a single line diagram:
