T / F controllers/controllers/thyristor-controllers/t-and-f/
T and F controllers sense starting motors and boost the inrush currents for fast motor starts.
They also engage groups of binary weighted run capacitors for voltage balance and full power.
Binary grouping of run capacitors keeps the capacitor count low.
Three-phase voltages are symmetrical at all loads.
T and F controllers are used in converters especially for CNC machines, inverter loads, welders.
Capacitor switching is performed at zero volt difference between capacitors.
T and F are available between 8kW and 150kW.
Versions are for 230V and 400V and for 50Hz and 60Hz.