Uninterrupted Power Supply (UPS) Industrial UPS: IGBT/SCR Based Rectifier & Inverter, Fully Digital Controlled dual DSP/Micro controller, ranges from 500VA-250 KVA 1 phase Output, 10-1000 KVA 3 phase Output, Input & Output Isolation in Built. Commercial UPS: IGBT/SCR Based Rectifier & Inverter, ranges from 500VA-320 KVA 1 phase Output, 20-4000 KVA 3 phase Output.