UA..RA contactors for inrush currents exceeding 100 times the rated currents are now available up to 80 kvar. The UA..RA contactors are equipped with a special front mounted contact block which ensures the insertion of damping resistors in each phase, limiting the peak current at energization of capacitor banks. The contactors UA16..RA up to UA75..RA were released in June this year, and now the UA..RA range is completed by the addition of UA95..RA for 70 kvar and UA110..RA for 80 kvar.
As indicated above, contactors designed for connecting power factor correction capacitors must withstand high inrush current compared to the continuous current. Motor starting contactors must withstand moderate inrush current, but more importantly, they must break locked rotor current in the event that the motor stalls and the overload relay de-energizes the contactor. They may not be physically different, but they may have different ratings according to the duty. They may also may have different certifications indicating which code requirements they meet.