iSub is an integrated substation for new and retrofit installation powered by ETAP. iSub provides protection, control, automation, monitoring, and communication capabilities as a part of a comprehensive substation solution.

iSub is the brain of the substation that interfaces with its peers to adapt and respond to dynamically changing system conditions. Since iSub is built on the ETAP platform, it can seamlessly interface with ETAP. This built-in expansion capability allows you to utilize the advanced capabilities of ETAP as a distributed control system for electrical power systems with all the ETAP Real-Time software functionalities.