Slot: vector_group
_Vector group of the transformer for protective relaying, e.g., Dyn1. For unbalanced transformers, this may not be simply determined from the constituent winding connections and phase angle displacements. _
_ _
_The vectorGroup string consists of the following components in the order listed: high voltage winding connection, mid voltage winding connection (for three winding transformers), phase displacement clock number from 0 to 11, low voltage winding connection _
_phase displacement clock number from 0 to 11. The winding connections are D (delta), Y (wye), YN (wye with neutral), Z (zigzag), ZN (zigzag with neutral), A (auto transformer). Upper case means the high voltage, lower case mid or low. The high voltage winding always has clock position 0 and is not included in the vector group string. Some examples: YNy0 (two winding wye to wye with no phase displacement), YNd11 (two winding wye to delta with 330 degrees phase displacement), YNyn0d5 (three winding transformer wye with neutral high voltage, wye with neutral mid voltage and no phase displacement, delta low voltage with 150 degrees displacement). _
_ _
Phase displacement is defined as the angular difference between the phasors representing the voltages between the neutral point (real or imaginary) and the corresponding terminals of two windings, a positive sequence voltage system being applied to the high-voltage terminals, following each other in alphabetical sequence if they are lettered, or in numerical sequence if they are numbered: the phasors are assumed to rotate in a counter-clockwise sense.
URI: cim:PowerTransformer.vectorGroup
Applicable Classes
| Name | Description | Modifies Slot |
|---|---|---|
| PowerTransformer | An electrical device consisting of two or more coupled windings, with or wit... | no |
| MktPowerTransformer | Subclass of IEC61970:Wires:PowerTransformer | no |
Properties
- Range: String
Identifier and Mapping Information
Schema Source
- from schema: https://cim.ucaiug.io/ns#TC57CIM
LinkML Source
name: vector_group
description: "Vector group of the transformer for protective relaying, e.g., Dyn1.\
\ For unbalanced transformers, this may not be simply determined from the constituent\
\ winding connections and phase angle displacements.\r\n\r\nThe vectorGroup string\
\ consists of the following components in the order listed: high voltage winding\
\ connection, mid voltage winding connection (for three winding transformers), phase\
\ displacement clock number from 0 to 11, low voltage winding connection \r\nphase\
\ displacement clock number from 0 to 11. The winding connections are D (delta),\
\ Y (wye), YN (wye with neutral), Z (zigzag), ZN (zigzag with neutral), A (auto\
\ transformer). Upper case means the high voltage, lower case mid or low. The high\
\ voltage winding always has clock position 0 and is not included in the vector\
\ group string. Some examples: YNy0 (two winding wye to wye with no phase displacement),\
\ YNd11 (two winding wye to delta with 330 degrees phase displacement), YNyn0d5\
\ (three winding transformer wye with neutral high voltage, wye with neutral mid\
\ voltage and no phase displacement, delta low voltage with 150 degrees displacement).\r\
\n\r\nPhase displacement is defined as the angular difference between the phasors\
\ representing the voltages between the neutral point (real or imaginary) and the\
\ corresponding terminals of two windings, a positive sequence voltage system being\
\ applied to the high-voltage terminals, following each other in alphabetical sequence\
\ if they are lettered, or in numerical sequence if they are numbered: the phasors\
\ are assumed to rotate in a counter-clockwise sense."
from_schema: https://cim.ucaiug.io/ns#TC57CIM
rank: 1000
slot_uri: cim:PowerTransformer.vectorGroup
multivalued: false
alias: vector_group
owner: PowerTransformer
domain_of:
- PowerTransformer
range: string
required: false