... high-voltage electrical network. It suitable for 50Hz and 60Hz three phase AC 35kv, 10kv, 6kv, 3kv power system. High accuracy, ... the majority of the electricity sector, enhance supply management.Three-phase four-wire three 3 components high voltage metering box (combined transformer) ... current transformers (CT). PT and CT are the electromagnetic, three PT winding are connect as Y/Y shape, the primary ...