Transformer Banks and Units

​A transformer feature in the device feature class in the electric domain network represents a bank of up to three single-phase transformer units.

​Required Configuration

• ​The E:Has Connected Units network category is used to distinguish between a bank type transformer and a transformer without units.

• ​Both in-line and tapped transformers must have two terminals.

• ​User must set up a terminal configuration in the network properties that is directional and then apply this terminal configuration to the asset group and asset types that are in-line and tapped transformers.

• Set the TerminalConfiguration attribute to None for in-line and tapped transformers that are bank devices, E:Has Connected Units.

• Set the TerminalConfiguration attribute to All for in-line and tapped transformers that contain units that do not participate in connectivity, E:Has Disconnected Units.

• ​Set the TerminalConfiguration attribute to All for in-line and tapped transformers that do not contain units.

• ​When using units:

  • ​The units of a transformer bank are stored in the JunctionObject table in the electric domain network.

  • ​Each unit is contained by the bank feature with a containment association in the UN.

  • ​Each unit is connected directly across two of the transformer’s terminals to represent the voltage transformation function between the terminals.

  • ​Each unit carries a single named phase in its PhasesNormal attribute.

  • ​In the case of a symmetrical three-phase transformer bank, the bank may contain a single unit that represents all three phases (ABC).