8
UPS 20-40 kVA, 230/400 V 50/60 Hz output
User’s Guide
1025358
Revision D
Due to the active front rectifier, the UPS is comparable to a clean resistor load from the mains
perspective. Thus, the high input power factor provides minimised cabling and fusing costs due
to no reactive power consumption.
The low harmonic currents are due to high input power factor and provide the benefits:
•
No additional losses in wires and cables
•
No extra heating of transformers and generators with shortened service life
•
No false circuit breaker tripping and malfunction
•
No erratic operation of computers, telecommunication, monitors, electronic test equipment
etc.
•
No Resonance with power factor correction capacitors
Feature: Advanced Battery Management (ABM)™
The ABM monitors the status of the battery and charges it only when the battery needs
charging. This is the key to long battery life with the ABM due to low generation of corrosion
inside the battery. It also monitors that the load never crashes because of bad or defected
battery.
The main cause for corrosion is current flowing through battery. The more current going
through battery, the shorter the battery life. Current flows through battery when it is discharged
or charged. There is very little that can be done for discharging, because it depends on number
of power outages in utility line.
The ABM is very valuable feature since most of the time battery does not need any charging.
The charging is controlled and initiated on the following occasions:
- When turning the unit on
- After 18 days without charging
- If the open cell voltage decreases below predetermined voltage level
Hence, the function of ABM system is to prolong the battery life considerably compared to
traditional system that uses float-charging technology. This means that there is no current going
through batteries all the time and causing corrosion. In a traditional online UPS the inverter also
causes ripple-current to be fed to batteries causing corrosion.
Feature: Hot Sync
®
technology
The UPS product features U.S. #5,745,365 patented paralelling technology that provides N+X
redundancy without introducing a single-point-of-failure. The products utilising the Hot Sync are
completely autonomous and the only thing common among them is the critical output power
bus.
The Hot Sync is 100% mathematical firmware that makes it more reliable than traditional
paralleling techniques. Because the solution is implemented intrinsically, and Hot Sync is
always active, the UPS modules do not know whether or not they are even in parallel.
