Three phase i6 series Industrial UPS has been designed to perform under extreme operating conditions that normally exist in industrial environments. The use of digital signal processors (DSP) has made the control loop of the UPS system very stable, drift free and with better HMI for monitoring, control and precise settings of parameters. High speed CAN bus interfaced sections make the system response very fast to handle the extreme transient load conditions. Intelligent power device with sandwich bus architecture makes the systems highly efficient and reliable..