The NTMI three-phase voltage transformer is designed for 6-10 kV three-phase networks with insulated or grounded-through-arc-suppression-reactor neutral. The unit feeds metering, protection and earth-fault signalling circuits.
Indoor switchgear of industrial substations, mining and oil-and-gas facilities. Particularly suitable where independent monitoring of each phase voltage is required.
Five-leg core suppresses zero-sequence flux; additional broken-delta winding for insulation monitoring; oil-immersed sealed construction.