Eaton Electrical ’s XT family of IEC Power Control has expanded to include XTCC Capacitor Contactors. These contactors are designed for the specific application requirements associated with switching power-factor correction capacitors (PFC).
Many customers use power-factor correction capacitors to increase the efficiencies of their overall power systems. When switching capacitors in and out of the power system, the switching device (contactor) can experience initial in-rush currents near 180x the nominal current.
This high current can reduce the life of the contactor or require significant oversizing. The XTCC Capacitor Contactors include early-make auxiliary contacts that bring pre-charge resistors into the circuit to handle the high in-rush currents. Antiweld contact material also extends the life of the XTCC contactors.