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Lift Inverter

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.

Technical Specification

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
Crest Factor 04:01
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