Parallel source operation... 

ElectricalOM lets:

    • Identical sources to be modelled as parallel sources connected to certain components, a Switch Board, a Junction Board, and a Transfer Switch

First, there must be a switchboard with multiple sources. Without parallel sources are set, only one source can be active at a time, so, the active source must be one of the sources which are going to be modelled as parallel sources. In the case shown below, Transformer 1 is the active source and is going to be one of the parallel sources.



When Parallel source operation... option is selected, ElectricalOM will list all the sources which are possible to run in parallel together with the active source. In the case below, the active source is Transformer 1 and possible sources which can be run in parallel are Transformer 2 and Generator.

As it can be seen from the picture above, all the sources have different ratings or types; Transformer 1 is a 500KVA transformer, Transformer 2 is 250 KVA transformer and the third source, Generator, is a 150KVA generator. It is mentioned above that in order to set sources in parallel they have to be identical, so, ElectricalOM will match the type and settings of the active source with the selected sources from the Sources for the parallel operation list.



Once the required sources are selected and OK button is clicked, all the sources will be shown as active, with related switches in closed position, and all the settings will be identical except the given names for the sources.



To remove a source from parallel operation, Parallel source operation... can be used. The source needed to be removed from the parallel operation can be deselected from the Sources for parallel operation list and ElectrcialOM will cancel the parallel operation.

    • Multiple feeder circuits to be modelled as parallel supplies as long as the feeders are originated from the same distribution node

This option is available for Switch Boards, Junction Boxes, Transfer Switches, Transformers, UPSes, and Converters only. Similar to parallel sources, in order to model a component with multiple feeders working in parallel, first, there must be a component with multiple feeders already established. By default, only one supply can be active at a time, in the case shown below way no.1 of DB1 (switch in closed position) is the active supply to a UPS.



When Parallel source operation... option is selected, ElectricalOM will list all the supplies which are available to work in parallel with the active supply circuit. In the case below, the active supply circuit is 1.L1, 1.L2, 1.L3 of DB1 (3 phase connection) and possible parallel circuits are way no.2 and way no.3 of DB1. The circuit from DB2 is not listed as the active supply is not originated from DB2.



The user may select as many circuits as required to run in parallel by simply ticking the tick box next to the circuit from the Sources for parallel operation list. Once the OK button is clicked, all the supplies selected will be active, with related switches in closed position, automatically by ElectricalOM (shown in green rectangle). Circuits which are suitable to work in parallel will still be left as a supply but not parallel (shown in red rectangle).



The user can set circuits originating from DB2 to work in parallel also, by setting a circuit from DB2 as an active supply (by closing one of the switches) and using the Parallel source operation... option. It shall be noted that only the circuits from the same distribution node will run in parallel.

To remove a supply from parallel operation, Parallel source operation... can be used. The associated component can be deselected from the Sources for parallel operation list and ElectrcialOM will remove the selected circuit from parallel operation.