Flow Diagram :
Under normal conditions if inputs mains voltage is within limits, the Charger/Rectifier converts AC to DC & charges the batteries as well as supplying current to the Inverter, to which the load is directly connected. Thus in an On-line UPS irrespective of whether mains is present or not the load is always connected to the Inverter.
When the Mains fails or goes out of permitted limits, the Charger output becomes zero, & the batteries which are kept floating across the Charger O/P terminals immediately supply power (DC Input) to the Inverter without any break. In an On-line UPS there is no requirement of any Change-over Mechanism for change over from Mains to the Inverter & hence the transfer is smooth & very fast. The Inverter will continue to supply load for the duration of battery discharge period.
When the Mains returns back to normal or within the permissible tolerance limits, the Rectifier/Charger again feeds the Inverter & recharges the batteries. The reconnection of Mains Supply causes no disturbance to the load.
SALIENT FEATURES OF ON-LINE UPS :
||TRUE ON-LINE DOUBLE CONVERSION TECHNOLOGY|
||HIGH SWITCHING FREQUENCY OPERATION-PURE SINE WAVE.|
||HARMONIC DISTORTION LESS THAN 2 %.|
||FULLY COMPATIBLE WITH DG SET.|
||TOTAL PROTECTION AGAINST EMI/RFI INTERFERENCES.|
||EXTENDED BATTERY BACK UP.|
||CONSTANT VOLTAGE AND CONSTANT FREQUENCY SOURCE.|
||WIDE INPUT VOLTAGE RANGE INCREASING BATTERY LIFE.|
||VERY HIGH MTBF.|
||PARALLEL AND HOT STANDBY REDUNDANCY FOR MAXIMIZING UP TIME.|
||FREE POWER MANAGEMENT SOFTWARE FOR SAFE, SEQUENTIAL & AUTOMATIC SHUT-DOWN THRO' RS-232.|
|TOTAL PROTECTION FROM ALL MAJOR NINE POWER PROBLEMS|