Defined in File Ifc4x3_rc1.h
IfcSwitchingDevice: public Ifc4x3_rc1::IfcFlowController¶
A switch is used in a cable distribution system (electrical circuit) to control or modulate the flow of electricity. Switches include those used for electrical power, communications, audio-visual, or other distribution system types as determined by the available ports.
HISTORY New entity in IFC2x4
Type Use Definition IfcSwitchingDevice defines the occurrence of any switching device; common information about switching device types is handled by IfcSwitchingDeviceType. The IfcSwitchingDeviceType (if present) may establish the common type name, usage (predefined type), properties, materials, ports, composition, assignments, and representations. The IfcSwitchingDeviceType is attached using the IfcRelDefinesByType objectified relationship and is accessible by the IsTypedBy inverse attribute. If the IfcSwitchingDeviceType has ports or aggregated elements, such objects are reflected at the IfcSwitchingDevice occurrence using the IfcRelDefinesByObject relationship. Figure 208 illustrates switching device type use. Figure 208 — Switching device type use
Property Use Definition The property sets relating to this entity are defined by IfcPropertySet and attached by the IfcRelDefinesByProperties relationship. They are accessible by the IsDefinedBy inverse attribute. Property sets may also be specified at the IfcSwitchingDeviceType, defining the common property data for all occurrences of the same type. They are then accessible by the IsTypedBy inverse attribute pointing to IfcSwitchingDeviceType.HasPropertySets. If both are given, then the properties directly defined at IfcSwitchingDevice override the properties defined at IfcSwitchingDeviceType. Refer to the documentation at the supertype IfcFlowController and ancestors for inherited property set definitions. The following property set definitions are applicable to this entity: (All Types)
Pset_SwitchingDeviceTypeCommon (PSET_TYPEDRIVENOVERRIDE) Pset_SwitchingDeviceTypePHistory (PSET_PERFORMANCEDRIVEN)
Quantity Use Definition The quantities relating to this entity are defined by IfcElementQuantity and attached by the IfcRelDefinesByProperties relationship. They are accessible by the IsDefinedBy inverse attribute. The following base quantities are defined and shall be exchanged with the IfcElementQuantity.Name = ‘BaseQuantities’. Other quantities, being subjected to local standard of measurement, may be defined with another string value assigned to Name. In this case a valid value for MethodOfMeasurement shall be provided.
Material Use Definition The material of the IfcSwitchingDevice is defined by IfcMaterialConstituentSet or as a fallback by IfcMaterial, and attached by the RelatingMaterial attribute on the IfcRelAssociatesMaterial relationship. It is accessible by the HasAssociations inverse attribute. Material information can also be given at the IfcSwitchingDeviceType, defining the common attribute data for all occurrences of the same type. The following keywords for IfcMaterialConstituentSet.MaterialConstituents[n].Name shall be used:
Casing: Material from which the casing is constructed. Conductor: Material from which the conductors are constructed. Surface: Material from which the switch surface is constructed.
Port Use Definition The distribution ports relating to the IfcSwitchingDevice are defined by IfcDistributionPort and attached by the IfcRelConnectsPortToElement relationship. If the switching device occurrence is defined by IfcSwitchingDeviceType, then the port occurrences must reflect those defined at the IfcSwitchingDeviceType using the IfcRelDefinesByObject relationship. Ports are specific to the IfcSwitchingDevice PredefinedType as follows indicated by the IfcDistributionPort Name, PredefinedType, and FlowDirection:
Line (ELECTRICAL, SINK): The supply line. Load (ELECTRICAL, SOURCE): The load controlled by the switch.
Figure 209 illustrates switching device port use. Figure 209 — Switching device port use
Whether the optional attribute PredefinedType is defined for this IfcSwitchingDevice.
IfcSwitchingDevice(std::string v1_GlobalId, ::Ifc4x3_rc1::IfcOwnerHistory *v2_OwnerHistory, boost::optional<std::string> v3_Name, boost::optional<std::string> v4_Description, boost::optional<std::string> v5_ObjectType, ::Ifc4x3_rc1::IfcObjectPlacement *v6_ObjectPlacement, ::Ifc4x3_rc1::IfcProductRepresentation *v7_Representation, boost::optional<std::string> v8_Tag, boost::optional<::Ifc4x3_rc1::IfcSwitchingDeviceTypeEnum::Value> v9_PredefinedType)¶