Delta connection

Connects the phases in delta (a–b, b–c, c–a).

  • 3-phase
  • Modelica Standard Library
  • 2 ports
BlockDelta connectionKinddeltaLibrary3-phase

Description

Connects three single-phase elements in delta. Wire the elements’ plug_p to the line and to this block’s plug_p, and their plug_n to this block’s plug_n. Element a then sits between lines a and b, b between b and c, and c between c and a.

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 Delta connection 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 pointPhase a tapPhase b tapPhase c tap3-phase current sensor3-phase power sensor

Ports

Conserving terminals 2

  • abcplug_p3-phase

    Three-phase plug in order a, b, c.

  • bcaplug_n3-phase

    Three-phase plug in order b, c, a: its phase a is joined to phase b of plug_p, and so on.

Equations

Modelica
plug_n.a = plug_p.b, plug_n.b = plug_p.c, plug_n.c = plug_p.a (same potential and current balance)

Implementation

Modelica Standard Library 4.1.0Modelica.Electrical.Polyphase.Basic.Delta
MSL documentation

See also

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