Rational Electronic and Systems supplies Forced Air Cooling Uninterrupted Power Supply - UPS. Rational Electronic and Systems manufactures inverter, voltage stabilizer, control and power transformers and control rectifier. Forced Air Cooling Uninterrupted Power Supply - UPS has the capacity of 1KVA to 40KVA and has a Sine weighted pulses inversion technique at high carrier frequency. Forced Air Cooling Uninterrupted Power Supply - UPS is a rectifier cum charger to provide load current and simultaneously charge the battery. Galvanic isolation between output and input is done to protect from spikes/surges. The UPS can protect output over voltage, battery over load, output under voltage, output overload, battery under voltage, battery over voltage, battery reverse polarity, charging current limit, igbt/mosfet protection.