On-Line UPS
Flow Diagram :
Normal
Operating Conditions:
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.
Mains
Failure:
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.
Return
of Mains:
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. | |
OVER-LOAD/SHORT-CIRCUIT PROTECTION. | |
COLD-START FACILITY. | |
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 | |