TransformerEnd

Class Description

A conducting connection point of a power transformer. It corresponds to a physical transformer winding terminal. In earlier CIM versions, the TransformerWinding class served a similar purpose, but this class is more flexible because it associates to terminal but is not a specialization of ConductingEquipment.

Attributes

Name	Type	Description
bmagSat	PerCent	Core shunt magnetizing susceptance in the saturation region.
endNumber	Integer	Number for this transformer end, corresponding to the end's order in the power transformer vector group or phase angle clock number. Highest voltage winding should be 1. Each end within a power transformer should have a unique subsequent end number. Note the transformer end number need not match the terminal sequence number.
grounded	Boolean	(for Yn and Zn connections) True if the neutral is solidly grounded.
magBaseU	Voltage	The reference voltage at which the magnetizing saturation measurements were made.
magSatFlux	PerCent	Core magnetizing saturation curve knee flux level.
rground	Resistance	(for Yn and Zn connections) Resistance part of neutral impedance where 'grounded' is true.
xground	Reactance	(for Yn and Zn connections) Reactive part of neutral impedance where 'grounded' is true.

Relationships

Ancestors

• IdentifiedObject

Descendents

• PowerTransformerEnd
• TransformerTankEnd

Associations

Source Class	Source Cardinality	Target	Target Cardinality	Source Name	Source Assoc. Description	Target Name	Target Assoc. Description
TransformerEnd	1	PhaseTapChanger	0..1	TransformerEnd	Transformer end to which this phase tap changer belongs.	PhaseTapChanger	Phase tap changer associated with this transformer end.
TransformerEnd	0..*	TransformerStarImpedance	0..1	TransformerEnd	All transformer ends having this star impedance.	StarImpedance	(accurate for 2- or 3-winding transformers only) Pi-model impedances of this transformer end. By convention, for a two winding transformer, the full values of the transformer should be entered on the high voltage end (endNumber=1).
TransformerEnd	1	RatioTapChanger	0..1	TransformerEnd	Transformer end to which this ratio tap changer belongs.	RatioTapChanger	Ratio tap changer associated with this transformer end.
TransformerEnd	0..*	BaseVoltage	0..1	TransformerEnds	Transformer ends at the base voltage. This is essential for PU calculation.	BaseVoltage	Base voltage of the transformer end. This is essential for PU calculation.
TransformerEnd	0..*	Terminal	0..1	TransformerEnd	All transformer ends connected at this terminal.	Terminal	Terminal of the power transformer to which this transformer end belongs.
TransformerEnd	1..*	TransformerMeshImpedance	0..*	ToTransformerEnd	All transformer ends this mesh impedance is connected to.	ToMeshImpedance	All mesh impedances between this 'from' and other 'to' transformer ends.
TransformerEnd	1	TransformerMeshImpedance	0..*	FromTransformerEnd	From end this mesh impedance is connected to. It determines the voltage reference.	FromMeshImpedance	All mesh impedances between this 'to' and other 'from' transformer ends.
TransformerEnd	0..*	TransformerCoreAdmittance	0..1	TransformerEnd	All transformer ends having this core admittance.	CoreAdmittance	Core admittance of this transformer end, representing magnetising current and core losses. The full values of the transformer should be supplied for one transformer end only.
TransformerEnd	1	WindingInsulation	0..*	ToWinding		ToWindingInsulations
TransformerEnd	1	WindingInsulation	0..*	FromWinding		FromWindingInsulations