View of the PROTECT C. components
2.2System Description
The UPS is connected between the public utility's mains and the loads to be protected.
The power section of the rectifier converts the mains voltage to DC voltage for supplying the inverter. The circuit technology used (PFC) enables sinusoidal current consumption and therefore operation with little system disturbance. A separate, second rectifier (charging REC set up using switch mode power supply technology) is responsible for charging or trickle-charging the battery connected in the intermediate circuit. The configuration of this charging REC means the harmonic content of the charging current for the battery is almost zero, so the service life of the battery is increased even more. The inverter is responsible for converting the DC voltage into a sinusoidal output voltage. A microprocessor-controlled control system based on pulse- width modulation (PWM) in conjunction with digital signal processor technology and extremely quickly pulsating IGBT power semiconductors of the inverter guarantee that the
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