IFCELECTRICALDOMAIN
The data model consists of the following:
The IfcElectricalDomain schema forms part of the Domain Layer of
the IFC Model. It extends the ideas concerning building services outlined in
the IfcSharedBldgServicesElements schema. It defines concepts of
electrical supply and provision and concepts of light fixtures and illuminance
within buildings.
Scope
The scope of the IfcElectrical domain is defined as:
- low voltage electrical installations from 12V (AC/DC) to 1000V (AC)
or 1500 volts (DC) in accordance with IEC definitions where installations in
scope are considered to commence at a meter where the public utility supply
terminates or at a transformer where voltage is stepped down to the low voltage
range in scope,
- connection of equipment to circuits, distribution points etc,
- steady state operation of electrical installations,
- light fixtures (fittings), their types and the provision of such
information as is necessary to enable lighting calculations that provide
physically accurate illuminance.
The IfcElectricalDomain schema supports ideas including types of:
- cable carrier fittings (for conduit, cable tray, cable duct and
ladder),
- electrical appliance,
- electric heater,
- electric motor,
- distribution points including various types of control, mimic and
indicator panels,
- generator,
- junction box,
- light fixture,
- lamp,
- outlet,
- protective device,
- switching device,
- transformer,
Out of Scope
The following are deemed to be out of scope of the IfcElectricalDomain schema
at this time:
- medium and high voltage installations over 1000 volts AC and 1500
volts DC
- systems with voltage of less than 12 volts (AC/DC)
- public utility supply of electrical services
- path of cables/conductors (other than as logical paths identifying
connection sequence)
- cable routers (cable ladders)
- electrical appliances like fax machines, phones, printers etc other
than as defined as electric appliances for the purposes of identification.
- non steady state/transient states of operation of electrical
installations
- security arrangements associated with safety of electrical
installations
- communication signals between automation devices or bus systems
- sensors (which are dealt with in the IfcBuildingControl domain
schema)
- computer network cabling and devices used on networks
- spotlight mirror systems whereby a spotlight is directed towards a
distant mirror that the distributes the light energy (other than as a group of
separately defined objects)
- lighting for specialist purposes (e.g. stage, painting, etc.)
- properties and provisions that enable the visual display or rendering
of surfaces under illuminance (rendering, as in VRML, and photo accurate
simulation are within the scope of the IfcPresentationResource
schema.
Occurrence
Many classes within this schema define types of elements that are used
in electrical building services. They are defined either as subtypes of
IfcTypeProduct or of other classes that are themselves subtypes of
IfcTypeProduct.
The objective is that a particular type of element is defined once in an
IFC exchange. Occurrences of elements conforming to a particular
type are defined by instances of related subtypes of IfcDistributionElement.
Details of the relevant occurrence subtype are provided in the documentation
for the type class.
Electrical Circuit
Electrical devices form part of an electrical circuit. An instance of an
electrical circuit is defined as a named instance of IfcSystem.
HISTORY:New schema in
IFC Release 2x.
Interfaced schemas (7):
Entities (19):
Enumerations (18):
