Parallel uninterruptible power supply VTEU

DCACemergency

Charging and rectifying units VTEU and UBP are provided for conversion of AC into regulated DC for charging of accumulator batteries and power supply of consumers with DC voltage both at buffer connection with accumulator battery and directly. Application benefits increased rectifier reliability due to microprocessor control system and galvanic isolation from supply network; provision of several operation modes and control logics; automatic on-load voltage supply according to set parameters upon rectifier start-up, operation and switching; availability of service programs for adjustment, repair and monitoring of rectifier parameters; complete monitoring of parameters and protection of rectifier and load in all steady and emergency modes. VTEU and UBP (hereinafter rectifier) provide smooth adjustment of output voltage from 5 % to 110 % of rated voltage; provide IU-characteristics of output voltage in accordance with DIN41773 during operation with accumulator batteries. Deviations of rectifier output current (voltage) in output current (voltage) stabilization mode don’t exceed ± 1 % of output current (voltage) setting value upon acceptable supply network voltage deviations. Pulsation coefficient of rectifier output voltage is max. 0.08 without capacitive filter at the output and max. 0.04 with the installed capacitive filter upon operation for active load, rated output current and rated output voltage. Rectifier provides parallel operation with similar rectifiers with gross load. Rectifier is dynamically and thermally resistant to internal and external short circuits.