LIFT UPS is an OFF LINE UPS which has 3 main parts namely – Charger, Inverter and Batteries. As majority of Elevators use three phase power supply, the UPS also is three phase input and three phase output type. The LIFT UPS takes three phase supply and feeds to Elevator simultaneously charging the batteries. In case of a power cut, the inverter turns on battery mode and generates three phase output to feed the load.
This transition takes place within a time period of 15-20 seconds depending upon the configuration of the variable frequency drive (VFD / V3F) used by the elevator. When the mains supply or utility gets restored, the elevator is transferred automatically to mains supply and battery charging starts. Depending upon the size and number of batteries the backup time can be extended from 2-3 Hours up to 8 Hours too.
|AC INPUT||Input Voltage||415 VAC +15, - 20 % / 230VAC +15, -20% *|
|Input Frequency||50 Hz +/- 6 %|
|DC CHARGER||Rectifier||ATM Tech. Boost and Float mode|
|Battery Voltage||72V-96V; 96V-180V; 240V-360V; 360V; 144V-240V|
|AC OUTPUT||Technology||Mosfet / IGBT Based PWM Inverter using Micro Controller|
|Output voltage||400 VAC +/- 2 %|
|Output Frequency||50 Hz +/- 0.5 %|
|Output Power factor||0.8 to 1 lag|
|Output waveform||PWM Sine wave|
|Phase Displacement||120⁰ + 1⁰|
|Galvanic Isolation||Inbuilt Galvanic Isolation Transformer Provided|
|Harmonic Distortion||Less than 3 % on Linear Load|
|Transient Recovery||+ 4 % from 0 to Full load and corrected within 60 msec.|
|Inverter Efficiency||87 % - 93 % Depending on DC voltages|