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. |