System Concept; Block Diagram; Normal Operation; Ac Utility Failure - INFOSEC UPS SYSTEM XP PRO Série Notice D'utilisation

4 SYSTEM CONCEPT

The purpose to present this chapter is to give you more precise conception about how UPS
works.
4.1

Block Diagram

INPUT
4.2

Normal Operation

There are two main loops when AC utility is normal : the AC output loop and the battery
charging loop. The AC output gets power from AC utility input and pass through AVR to
support power to load. In the same time, the AC utility input is converted by AC/DC CHA and
support charging power to charge batteries.
INPUT
Fig. 2 shows how the UPS works when AC Utility normal.
4.3

AC Utility Failure

If AC utility fails, the UPS quickly detects the problem and activates the inverter. The DC/AC
inverter changes DC power from the batteries into AC and provides continuous
uninterruptible power to load.
INPUT
Fig. 3 shows how the UPS works when AC Utility Failure
INFOSEC UPS SYSTEM - 4, rue de la Rigotière - 44700 Orvault - France - www.infosec.fr
Hot Line : tél : +33(0)2 40 76 15 82 - fax : +33 (0)2 40 94 29 51- hotline@infosec.fr - 10 05 04 205 02
N.F.
CHA.
Fig. 1 shows how UPS works.
N.F.
CHA.
N.F.
CHA.
AVR.
INV.
AVR.
INV.
N.F.
AVR.
INV.
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4
OUTPUT
N.F.
OUTPUT
N.F.
OUTPUT