2.2System description

The UPS is connected between the public network and the power load segments to be protected.

The rectifier is powered from the mains and converts the AC voltage into a stabilized DC voltage to feed the inverter. The circuitry technology used (PFC) enables sinusoidal current consumption, thus allowing a low circuit feedback operation. A separate, second rectifier (charger) based on switching power supply technology recharges or maintains the charge of the battery in the intermediate circuit. Due to the special circuitry technology used in this charger/ rectifier, the harmonics of the charging current are reduced significantly. Additionally, a sleep mode considerably increases the service life of the battery. The inverter converts the DC voltage into a sinusoidal AC voltage. In combination with digital signal processor technology and extremely high pulse rate IGBT-power semiconductors in the inverter, a microprocessor-controlled regulator on the basis of pulse-width modulation (PWM) guarantees a voltage system of highest quality and availability on the secured busbar.

EN

In the event of mains problems (e.g. power outages), power is supplied to the load segment without any interruption from the inverter, which now uses the battery. Since no switching is required, the load segment experiences no power supply interruption at all.

9