Installation guide

UPS 40-160 kVA, 400 V 50/60 Hz output
User’s and Installation Guide
1023294
Revision C
8
2.2 Feature: Active-Front Technology
Traditional input THD filters are no longer needed with this UPS product. The build-in
advanced rectifier technology of UPS modules provides perfect sinusoidal input power quality at
0.99 input power factor with harmonic content less than 5% THD(i). This leads to more reliable
total system operation and savings in generator and transformer sizing as losses in the windings
are minimised.
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
2.3 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.
2.4 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 Sycn 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.