How do I connect VoltageSource to Star in Wolfram SystemModeler?

In Wolfram System Modeler I cannot connect VoltageSource to Star. The system returns 'Error Incompatible components… '. Such a connection is used in system example PermanentMagnetSynchronousMotor. What is wrong?

See the attached example (based on Modelica.Electrical.MultiPhase.Examples.TestSensors) for how to connect voltage sources with Star.

Note that Modelica.Electrical.Analog.Interfaces.VoltageSource is a partial model and cannot be used directly.