F.A.Q. If you have queries not covered in the following topics, please let us know . What's the difference between PowerStar and PowerNet? How do I analyse a circuit? What electrical equipment and devices are modelled? Does it support imperial or metric units? Does it support 50 hz or 60 hz? What is the maximum number of circuit elements? What system voltages are supported? Does it comply with international standards? What technical support do you provide? What are the computer system requirement?