7.4.3.35 IfcProtectiveDevice

Équipement de protection
Sicherung

A protective device breaks an electrical circuit when a stated electric current that passes through it is exceeded.

A protective device provides protection against electrical current only (not as a general protective device). It may be used to represent the complete set of elements including both the tripping unit and the breaking unit that provide the protection. This may be particularly useful at earlier stages of design where the approach to breaking the electrical supply may be determined but the method of tripping may not. Alternatively, this entity may be used to specifically represent the breaking unit alone (in which case the tripping unit will also be specifically identified). This entity is specific to dedicated protective devices and excludes electrical outlets that may have circuit protection.

HISTORY  New entity in IFC4

Common Use Definitions

The following concepts are inherited at supertypes:

 Instance diagram

Object Typing

The Object Typing concept applies to this entity as shown in Table 407.
Type
IfcProtectiveDeviceType
IfcDistributionFlowElementType
IfcDistributionElementType

Table 407 — IfcProtectiveDevice Object Typing



Property Sets for Objects

The Property Sets for Objects concept applies to this entity as shown in Table 408.
PredefinedTypeName
 Pset_ProtectiveDeviceBreakerUnitI2TCurve
 Pset_ProtectiveDeviceBreakerUnitI2TFuseCurve
 Pset_ProtectiveDeviceBreakerUnitIPICurve
CIRCUITBREAKERPset_ProtectiveDeviceBreakerUnitTypeMCB
 Pset_ProtectiveDeviceBreakerUnitTypeMotorProtection
 Pset_ProtectiveDeviceTrippingCurve
CIRCUITBREAKERPset_ProtectiveDeviceTypeCircuitBreaker
 Pset_ProtectiveDeviceTypeCommon
EARTHLEAKAGECIRCUITBREAKERPset_ProtectiveDeviceTypeEarthLeakageCircuitBreaker
FUSEDISCONNECTORPset_ProtectiveDeviceTypeFuseDisconnector
RESIDUALCURRENTCIRCUITBREAKERPset_ProtectiveDeviceTypeResidualCurrentCircuitBreaker
RESIDUALCURRENTSWITCHPset_ProtectiveDeviceTypeResidualCurrentSwitch
VARISTORPset_ProtectiveDeviceTypeVaristor
 Pset_SoundGeneration
 Pset_ElectricalDeviceCommon
 Pset_Condition
 Pset_EnvironmentalImpactIndicators
 Pset_EnvironmentalImpactValues
 Pset_ManufacturerOccurrence
 Pset_ManufacturerTypeInformation
 Pset_PackingInstructions
 Pset_ServiceLife
 Pset_Warranty

Table 408 — IfcProtectiveDevice Property Sets for Objects



Quantity Sets

The Quantity Sets concept applies to this entity as shown in Table 409.
Name
Qto_ProtectiveDeviceBaseQuantities

Table 409 — IfcProtectiveDevice Quantity Sets



Material Constituents

The Material Constituents concept applies to this entity as shown in Table 410.
NameDescription
CasingMaterial from which the casing is constructed.

Table 410 — IfcProtectiveDevice Material Constituents



Port Nesting

The Port Nesting concept applies to this entity as shown in Table 411.
PredefinedTypeNameFlowTypeDescription
 LineSINKELECTRICALThe supply line, typically connected from a slot in a distribution board.
 LoadSOURCEELECTRICALThe load protected by this device, typically a cable connected to a device or the first junction box of a circuit.

Table 411 — IfcProtectiveDevice Port Nesting




XSD Specification:

 <xs:element name="IfcProtectiveDevice" type="ifc:IfcProtectiveDevice" substitutionGroup="ifc:IfcFlowController" nillable="true"/>
 <xs:complexType name="IfcProtectiveDevice">
  <xs:complexContent>
   <xs:extension base="ifc:IfcFlowController">
    <xs:attribute name="PredefinedType" type="ifc:IfcProtectiveDeviceTypeEnum" use="optional"/>
   </xs:extension>
  </xs:complexContent>
 </xs:complexType>

EXPRESS Specification:

ENTITY IfcProtectiveDevice
SUBTYPE OF IfcFlowController;
PredefinedType : OPTIONAL IfcProtectiveDeviceTypeEnum;
WHERE
CorrectPredefinedType : NOT(EXISTS(PredefinedType)) OR (PredefinedType <> IfcProtectiveDeviceTypeEnum.USERDEFINED) OR ((PredefinedType = IfcProtectiveDeviceTypeEnum.USERDEFINED) AND EXISTS (SELF\IfcObject.ObjectType));
CorrectTypeAssigned : (SIZEOF(IsTypedBy) = 0) OR ('IFCELECTRICALDOMAIN.IFCPROTECTIVEDEVICETYPE' IN TYPEOF(SELF\IfcObject.IsTypedBy[1].RelatingType));
END_ENTITY;

Link to EXPRESS-G diagram EXPRESS-G diagram

Formal Propositions:

CorrectPredefinedType : Either the PredefinedType attribute is unset (e.g. because an IfcProtectiveDeviceType is associated), or the inherited attribute ObjectType shall be provided, if the PredefinedType is set to USERDEFINED.
CorrectTypeAssigned : Either there is no protective device type object associated, i.e. the IsTypedBy inverse relationship is not provided, or the associated type object has to be of type IfcProtectiveDeviceType.

Inheritance Graph:

ENTITY IfcProtectiveDevice
ENTITY IfcRoot
GlobalId : IfcGloballyUniqueId;
OwnerHistory : OPTIONAL IfcOwnerHistory;
Name : OPTIONAL IfcLabel;
Description : OPTIONAL IfcText;
ENTITY IfcObjectDefinition
INVERSE
HasAssignments : SET OF IfcRelAssigns FOR RelatedObjects;
Nests : SET [0:1] OF IfcRelNests FOR RelatedObjects;
IsNestedBy : SET OF IfcRelNests FOR RelatingObject;
HasContext : SET [0:1] OF IfcRelDeclares FOR RelatedDefinitions;
IsDecomposedBy : SET OF IfcRelAggregates FOR RelatingObject;
Decomposes : SET [0:1] OF IfcRelAggregates FOR RelatedObjects;
HasAssociations : SET OF IfcRelAssociates FOR RelatedObjects;
ENTITY IfcObject
ObjectType : OPTIONAL IfcLabel;
INVERSE
IsDeclaredBy : SET [0:1] OF IfcRelDefinesByObject FOR RelatedObjects;
Declares : SET OF IfcRelDefinesByObject FOR RelatingObject;
IsTypedBy : SET [0:1] OF IfcRelDefinesByType FOR RelatedObjects;
IsDefinedBy : SET OF IfcRelDefinesByProperties 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;
IsInterferedByElements : SET OF IfcRelInterferesElements FOR RelatedElement;
InterferesElements : SET OF IfcRelInterferesElements FOR RelatingElement;
HasProjections : SET OF IfcRelProjectsElement FOR RelatingElement;
ReferencedInStructures : SET OF IfcRelReferencedInSpatialStructure FOR RelatedElements;
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
INVERSE
HasPorts : SET OF IfcRelConnectsPortToElement FOR RelatedElement;
ENTITY IfcDistributionFlowElement
INVERSE
HasControlElements : SET [0:1] OF IfcRelFlowControlElements FOR RelatingFlowElement;
ENTITY IfcFlowController
ENTITY IfcProtectiveDevice
PredefinedType : OPTIONAL IfcProtectiveDeviceTypeEnum;
END_ENTITY;

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