IFC 4.3.0.1 (IFC4X3) development

7.4.4.44 Pset_ProtectiveDeviceBreakerUnitI2TFuseCurve

7.4.4.44.1 Semantic definition

A coherent set of attributes representing curves for melting- and breaking-energy of a fuse. Note - A fuse may be associated with different instances of this property set providing information related to different basic characteristics.

7.4.4.44.2 Applicable entities

7.4.4.44.3 Properties

Name Property Type Data Type Description
VoltageLevel IfcPropertyEnumeratedValue PEnum_VoltageLevels

The voltage levels for which the data of the instance is valid. More than one value may be selected in the enumeration.

BreakerUnitFuseMeltingCurve IfcPropertyTableValue IfcReal/IfcElectricCurrentMeasure

A curve that establishes the energy required to melt the fuse of a breaker unit when a particular prospective melting current is applied. Note that the breaker unit fuse melting curve is defined within a Cartesian coordinate system and this fact must be:

(1) Defining value: ProspectiveCurrentMelting :A list of minimum 2 and maximum 8 numbers providing the currents in [A] for points in the current/melting_energy log/log coordinate space. The curve is drawn as a straight line between two consecutive points. (2) Defined value: MeltingEnergy: A list of minimum 2 and maximum 8 numbers providing the energy whereby the fuse is starting to melt, I2t, in [A2s] for points in the current/melting_energy log/log coordinate space. The curve is drawn as a straight line between two consecutive points.

BreakerUnitFuseBreakingingCurve IfcPropertyTableValue IfcReal/IfcElectricCurrentMeasure

A curve that establishes the let through breaking energy of a breaker unit when a particular prospective breaking current is applied. Note that the breaker unit fuse breaking curve is defined within a Cartesian coordinate system and this fact must be:

(1) Defining value: ProspectiveCurrentBreaking: A list of minimum 2 and maximum 8 numbers providing the currents in [A] for points in the current/breaking energy log/log coordinate space. The curve is drawn as a straight line between two consecutive points. (2) Defined value: LetThroughBreakingEnergy: A list of minimum 2 and maximum 8 numbers providing the breaking energy whereby the fuse has provided a break, I2t, in [A2s] for points in the current/breakting_energy log/log coordinate space. The curve is drawn as a straight line between two consecutive.

Table 7.4.4.44.A

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7.4.4.44.4 Changelog

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