Type

.jpg Associated
Classifications
Definition
Name System_SIGNAL
Description SIGNAL: A raw analog signal, such as modulated data or measurements from sensors. Template
Type (IFC) IfcSystem
Pre-defined type (IFC)
ElementType
Identifier 1COBieocc9999D0EZYV999
Tag
Pset_DistributionSystemTypeElectrical Definition from IAI: Properties of electrical circuits.
Property Name (mandatory) Property Description and Allowed Values Property Value
ElectricalSystemType
For certain purposes of electrical regulations, IEC 60364 defines types of system using type identifiers. Assignment of identifiers depends upon the relationship of the source, and of exposed conductive parts of the installation, to Ground (Earth). Identifiers that may be assigned through IEC 60364 are: •TN type system, a system having one or more points of the source of energy directly earthed, the exposed conductive parts of the installation being connected to that point by protective conductors, •TN C type system, a TN type system in which neutral and protective functions are combined in a single conductor throughout the system, •TN S type system, a TN type system having separate neutral and protective conductors throughout the system, •TN C S type system, a TN type system in which neutral and protective functions are combined in a single conductor in part of the system, •TT type system, a system having one point of the source of energy directly earthed, the exposed conductive parts of th
tn
tn_c
tn_s
tn_c_s
tt
it
other
notknown
unset
unset
ElectricalSystemCategory
Designates the voltage range of the circuit, according to IEC. HIGHVOLTAGE indicates >1000V AC or >1500V DV; LOWVOLTAGE indicates 50-1000V AC or 120-1500V DC; EXTRALOWVOLTAGE indicates <50V AC or <120V DC.
highvoltage
lowvoltage
extralowvoltage
other
notknown
unset
unset
Diversity
The ratio, expressed as a numerical value or as a percentage, of the simultaneous maximum demand of a group of electrical appliances or consumers within a specified period, to the sum of their individual maximum demands within the same period. The group of electrical appliances is in this case connected to this circuit. Defenition from IEC 60050, IEV 691-10-04 NOTE1: It is often not desirable to size each conductor in a distribution system to support the total connected load at that point in the network. Diversity is applied on the basis of the anticipated loadings that are likely to result from all loads not being connected at the same time. NOTE2: Diversity is applied to final circuits only, not to sub-main circuits supplying other DBs.
0.
NumberOfPhases
Number of phases within this circuit. Either this property or the PhaseReference property (if only one) may be asserted.
0
MaximumAllowedVoltageDrop
The maximum voltage drop across the circuit that must not be exceeded. There are two voltage drop limit settings that may be applied; one for sub-main circuits, and one in each Distribution Board or Consumer Unit for final circuits connected to that board. The settings should limit the overall voltage drop to the required level. Default settings of 1.5% for sub-main circuits and 2.5% for final circuits, giving an overall limit of 4% may be applied. NOTE: This value may also be specified as a constraint within an IFC model if required but is included within the property set at this stage pending implementation of the required capabilities within software applications.
0.
NetImpedance
The maximum earth loop impedance upstream of a circuit (typically stated as the variable Zs). This value is for 55o C (130oF) Celsius usage.
0.
Ownership
Owner History
Contact Nicholas Nisbet nn@buildingSMART.org.uk
Organization buildingSMART United Kingdom and Ireland Chapter bS UKI
TelephoneNumbers +44 1494 714933
ElectronicMailAddresses nn@buildingSMART.org.uk nn@buildingSMART.org.uk
WWWHomePageURL http://www.buildingSMART.org.uk http://www.buildingSMART.org.uk
Address 46 St Margarets Grove, Great Kingshill, High Wycombe Bucks HP15 6HP United Kingdom
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