IfcDistributionCircuit
配电电路是配电系统的一个分区，它是有条件切换的，如电路。
IFC4中的新实体。
对于电力系统，IFC4变更，IFCElectricalciit已用于低压（12-1000 V）电源电路，并已被IFC4中的IFCD分配电路所取代；整个电力系统应使用预定义类型为“电气”的IFC配电系统，每个开关电路应使用预定义类型为“电气”的IFC配电电路。
组合使用定义
IfcDistributionCircuit可以使用IfcRelAggregates关系聚合IfcDistributionSystem，其中RelatingObject指IfcDistributionSystem，RelatedObjects包括一个或多个IfcDistributionCircuit组。
可以使用IfcRelAggregates关系将IfcDistributionCircuit聚合为子电路，其中RelatingObject指的是父IfcDistributionCircuit，RelatedObjects指的是一个或多个IfcDistributionCircuit子电路。
分配使用定义
应将IFCDDistributionCircuit分配给IfcFlowController元素上的IFCDDistributionPort，该元素使用IFCRelassignStopProduct关系指示系统的主机或来源。
根据电路状态有条件运行的每个设备通过IfcReslassignStoGroup关系分配给IfcDistributionCircuit。一个IFCDDistributionElement可能属于多个系统或电路，但是只有一个特定预定义类型的IFCDDistributionSystem或IFCDDistributionCircuit。
| # | Attribute | Type | Cardinality | Description | C |
|---|---|---|---|---|---|
| IfcRoot | |||||
| 1 | GlobalId | IfcGloballyUniqueId | [1:1] | Assignment of a globally unique identifier within the entire software world. | X |
| 2 | OwnerHistory | IfcOwnerHistory | [0:1] | Assignment of the information about the current ownership of that object, including owning actor, application, local identification and information captured about the recent changes of the object,
NOTE only the last modification in stored - either as addition, deletion or modification. |
X |
| 3 | Name | IfcLabel | [0:1] | Optional name for use by the participating software systems or users. For some subtypes of IfcRoot the insertion of the Name attribute may be required. This would be enforced by a where rule. | X |
| 4 | Description | IfcText | [0:1] | Optional description, provided for exchanging informative comments. | X |
| IfcObjectDefinition | |||||
| HasAssignments |
IfcRelAssigns @RelatedObjects |
S[0:?] | Reference to the relationship objects, that assign (by an association relationship) other subtypes of IfcObject to this object instance. Examples are the association to products, processes, controls, resources or groups. | X | |
| Nests |
IfcRelNests @RelatedObjects |
S[0:1] | References to the decomposition relationship being a nesting. It determines that this object definition is a part within an ordered whole/part decomposition relationship. An object occurrence or type can only be part of a single decomposition (to allow hierarchical strutures only). | X | |
| IsNestedBy |
IfcRelNests @RelatingObject |
S[0:?] | References to the decomposition relationship being a nesting. It determines that this object definition is the whole within an ordered whole/part decomposition relationship. An object or object type can be nested by several other objects (occurrences or types). | X | |
| HasContext |
IfcRelDeclares @RelatedDefinitions |
S[0:1] | References to the context providing context information such as project unit or representation context. It should only be asserted for the uppermost non-spatial object. | X | |
| IsDecomposedBy |
IfcRelAggregates @RelatingObject |
S[0:?] | References to the decomposition relationship being an aggregation. It determines that this object definition is whole within an unordered whole/part decomposition relationship. An object definitions can be aggregated by several other objects (occurrences or parts). | X | |
| Decomposes |
IfcRelAggregates @RelatedObjects |
S[0:1] | References to the decomposition relationship being an aggregation. It determines that this object definition is a part within an unordered whole/part decomposition relationship. An object definitions can only be part of a single decomposition (to allow hierarchical strutures only). | X | |
| HasAssociations |
IfcRelAssociates @RelatedObjects |
S[0:?] | Reference to the relationship objects, that associates external references or other resource definitions to the object.. Examples are the association to library, documentation or classification. | X | |
| IfcObject | |||||
| 5 | ObjectType | IfcLabel | [0:1] | The type denotes a particular type that indicates the object further. The use has to be established at the level of instantiable subtypes. In particular it holds the user defined type, if the enumeration of the attribute PredefinedType is set to USERDEFINED. | X |
| IsDeclaredBy |
IfcRelDefinesByObject @RelatedObjects |
S[0:1] | Link to the relationship object pointing to the declaring object that provides the object definitions for this object occurrence. The declaring object has to be part of an object type decomposition. The associated IfcObject, or its subtypes, contains the specific information (as part of a type, or style, definition), that is common to all reflected instances of the declaring IfcObject, or its subtypes. | X | |
| Declares |
IfcRelDefinesByObject @RelatingObject |
S[0:?] | Link to the relationship object pointing to the reflected object(s) that receives the object definitions. The reflected object has to be part of an object occurrence decomposition. The associated IfcObject, or its subtypes, provides the specific information (as part of a type, or style, definition), that is common to all reflected instances of the declaring IfcObject, or its subtypes. | X | |
| IsTypedBy |
IfcRelDefinesByType @RelatedObjects |
S[0:1] | Set of relationships to the object type that provides the type definitions for this object occurrence. The then associated IfcTypeObject, or its subtypes, contains the specific information (or type, or style), that is common to all instances of IfcObject, or its subtypes, referring to the same type. | X | |
| IsDefinedBy |
IfcRelDefinesByProperties @RelatedObjects |
S[0:?] | Set of relationships to property set definitions attached to this object. Those statically or dynamically defined properties contain alphanumeric information content that further defines the object. | X | |
| IfcGroup | |||||
| IsGroupedBy |
IfcRelAssignsToGroup @RelatingGroup |
S[0:?] | Reference to the relationship IfcRelAssignsToGroup that assigns the one to many group members to the IfcGroup object. | X | |
| IfcSystem | |||||
| ServicesBuildings |
IfcRelServicesBuildings @RelatingSystem |
S[0:1] | Reference to the building spatial structure via the objectified relationship IfcRelServicesBuildings, which is serviced by the system. | X | |
| IfcDistributionSystem | |||||
| 6 | LongName | IfcLabel | [0:1] | Long name for a distribution system, used for informal purposes. It should be used, if available, in conjunction with the inherited Name attribute.
NOTE In many scenarios the Name attribute refers to the short name or number of a distribution system or branch circuit, and the LongName refers to a descriptive name. |
X |
| 7 | PredefinedType | IfcDistributionSystemEnum | [0:1] | Predefined types of distribution systems. | X |
| IfcDistributionCircuit | |||||
EXPRESS Specification
ENTITY IfcDistributionCircuit SUBTYPE OF (IfcDistributionSystem); END_ENTITY;
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