3-phase current sensor

Phase currents from plug + to plug −.

  • signal
  • 3-phase
  • Modelica Standard Library
  • 5 ports
Block3-phase current sensorKindthreePhaseCurrentSensorLibrary3-phase

Description

Measures the three phase currents flowing from plug_p to plug_n. Insert it in series; it has no voltage drop.

Example

Three-phase loads A 10 V three-phase supply into a resistive star load, a series R–L star load, and a capacitor bank in delta.

10 V 50 HzStar supplyGround supplyStar (R)Ground (R)Star (R–L)Ground (R–L)PowerCurrents (R)R 10 ΩR 10 Ω (R–L)Currents (R–L)L 31.8 mHCurrents (C)C 100 µFDeltaPhase aPhase bPhase cv av bv cGround aGround bGround c
In Gradara, select a 3-phase current sensor block and press F1, then choose Open example. It opens as a new model in My models, ready to run.

Also in this example:Voltage sensorGround3-phase AC source3-phase resistor3-phase inductor3-phase capacitorStar pointDelta connectionPhase a tapPhase b tapPhase c tap3-phase power sensor

Ports

Outputs 3

  • iasignal · A

    Phase a current, in amperes, positive from plug_p to plug_n.

  • ibsignal · A

    Phase b current, in amperes, positive from plug_p to plug_n.

  • icsignal · A

    Phase c current, in amperes, positive from plug_p to plug_n.

Conserving terminals 2

  • +plug_p3-phase

    Three-phase plug (phases a, b, c) where current enters.

  • −plug_n3-phase

    Three-phase plug (phases a, b, c) where current leaves.

Equations

Modelica
plug_p.k.v = plug_n.k.v
ik = plug_p.k.i for k = a, b, c

Implementation

Modelica Standard Library 4.1.0Modelica.Electrical.Polyphase.Sensors.CurrentSensor
MSL documentation

Tips

  • Feed ia, ib, ic to a Clarke transform for α–β currents.

See also

Select a block in Gradara and press F1 to open its page offline.