ETAP is a software that is used for network analysis in Electrical Engineering. It consists of a number of modules dealing with industrial distribution, transmission, arc flash analysis, etc. ETAP stands for Electrical Transient Analysis Program.
ETAP also provides a real time power management software module which offers integrated power monitoring, Load flow and short circuit analysis, etc. ETAP is particularly used in Transient Analysis which enables engineers to simulate the response of the system to transients.
A demo version of the software can be found here. http://www.etap.ca/software-download/