IfcElectricDistributionPoint

Definition from IAI: An IfcElectricDistributionPoint is a flow controller in which instances of electrical devices are brought together at a single place for a particular purpose

HISTORY: New entity in IFC 2x2

Property Set Use Definition:

The property sets relating to the IfcElectricDistributionPoint are defined by the IfcPropertySet and attached by the IfcRelDefinesByProperties relationship. It is accessible by the inverse IsDefinedBy relationship. The following property set definitions specific to an IfcElectricDistributionPoint are part of this IFC release:

Pset_ElectricDistributionPointCommon: common property set for all types of an electric distribution point panel, distribution board etc.), if available

Use Definitions

An IfcElectricDistributionPoint provides a housing for an aggregation of different types of instances of electrical distribution elements so that they can be viewed, operated or acted upon from a single place. Each item in the aggregation may have its own geometric representation and location by virtue of being a subtype of IfcProduct.

IfcElectricDistributionPoint acts as the relating object in an IfcRelAggregates relationship, the electrical devices that are brought together being the related objects.

Geometry Use Definitions

The geometric representation of an occurrence of an IfcElectricDistributionPoint is given by the IfcProductDefinitionShape, allowing multiple geometric representations. Included are:

Local Placement

The local placement is defined in the supertype IfcProduct. It is defined by a subtype of IfcObjectPlacement which can define an absolute placement, relative placement, or grid reference, with each defining the local coordinate system referenced by all geometric representations. The PlacementRelTo relationship of IfcLocalPlacement, if given, shall point to the same IfcSpatialStructureElement which is used in the ContainedInStructure inverse attribute, or to a referenced spatial structure element at a higher level. If the relative placement is not used, the absolute placement is defined within the world coordinate system.

Informal propositions for local placement:

If the LocalPlacement is specified, then all aggregated components should use this placement as their relative placement.

Standard Geometric Representation

Currently, the use of profiles to define the geometry for an occurrence of this class is not supported. The standard geometric representation is defined using explicit geometry.

B-Rep Representation

The faceted B-Rep capabilities (with or without voids) shall be supported for B-Rep representation.

EXPRESS specification:

ENTITY IfcElectricDistributionPoint

SUBTYPE OF (

IfcFlowController);

DistributionPointFunction

IfcElectricDistributionPointFunctionEnum;

UserDefinedFunction

OPTIONAL IfcLabel;

WHERE

WR31

(DistributionPointFunction <> IfcElectricDistributionPointFunctionEnum.USERDEFINED) OR ((DistributionPointFunction = IfcElectricDistributionPointFunctionEnum.USERDEFINED) AND EXISTS(SELF\IfcElectricDistributionPoint.UserDefinedFunction));

END_ENTITY;

Attribute definitions:

DistributionPointFunction

Identifies the functions or purposes that a distribution point may fulfill from which that required may be selected.

Formal Propositions:

WR31

The attribute UserDefinedFunction must be asserted when the value of the IfcElectricDistributionPointFunctionEnum is set to USERDEFINED.

Inheritance graph

ENTITY IfcElectricDistributionPoint;

ENTITY IfcRoot;

GlobalId

IfcGloballyUniqueId;

OwnerHistory

IfcOwnerHistory;

Name

OPTIONAL IfcLabel;

Description

OPTIONAL IfcText;

ENTITY IfcObjectDefinition;

INVERSE

HasAssignments

SET OF IfcRelAssigns FOR RelatedObjects;

IsDecomposedBy

SET OF IfcRelDecomposes FOR RelatingObject;

Decomposes

SET [0:1] OF IfcRelDecomposes FOR RelatedObjects;

HasAssociations

SET OF IfcRelAssociates FOR RelatedObjects;

ENTITY IfcObject;

ObjectType

OPTIONAL IfcLabel;

INVERSE

IsDefinedBy

SET OF IfcRelDefines FOR RelatedObjects;

ENTITY IfcProduct;

ObjectPlacement

OPTIONAL IfcObjectPlacement;

Representation

OPTIONAL IfcProductRepresentation;

INVERSE

ReferencedBy

SET OF IfcRelAssignsToProduct FOR RelatingProduct;

ENTITY IfcElement;

Tag

OPTIONAL IfcIdentifier;

INVERSE

FillsVoids

SET [0:1] OF IfcRelFillsElement FOR RelatedBuildingElement;

ConnectedTo

SET OF IfcRelConnectsElements FOR RelatingElement;

HasCoverings

SET OF IfcRelCoversBldgElements FOR RelatingBuildingElement;

HasProjections

SET OF IfcRelProjectsElement FOR RelatingElement;

HasStructuralMember

SET OF IfcRelConnectsStructuralElement FOR RelatingElement;

ReferencedInStructures

SET OF IfcRelReferencedInSpatialStructure FOR RelatedElements;

HasPorts

SET OF IfcRelConnectsPortToElement FOR RelatedElement;

HasOpenings

SET OF IfcRelVoidsElement FOR RelatingBuildingElement;

IsConnectionRealization

SET OF IfcRelConnectsWithRealizingElements FOR RealizingElements;

ProvidesBoundaries

SET OF IfcRelSpaceBoundary FOR RelatedBuildingElement;

ConnectedFrom

SET OF IfcRelConnectsElements FOR RelatedElement;

ContainedInStructure

SET [0:1] OF IfcRelContainedInSpatialStructure FOR RelatedElements;

ENTITY IfcDistributionElement;

ENTITY IfcDistributionFlowElement;

INVERSE

HasControlElements

SET [0:1] OF IfcRelFlowControlElements FOR RelatingFlowElement;

ENTITY IfcFlowController;

ENTITY IfcElectricDistributionPoint;

DistributionPointFunction

IfcElectricDistributionPointFunctionEnum;

UserDefinedFunction

OPTIONAL IfcLabel;

END_ENTITY;