this type of UPS, the AC mains is the primary power
source where any drop in voltage or battery current
is automatically detected by the UPS, which switches
over to the backup battery automatically. When AC
power is restored, the UPS switches back to pas
filtered mains and then recharges the battery.
The inverter is not connected in series
with the AC mains, but rather in parallel configuration.
There is transfer time associated with this changeover
which is typically around four to ten milliseconds,
which most computers switch mode power supply unit
will not see this break.
Standby UPS often
include a filter component, although this is more
suited to EMI/RF, and surge protection provided
through simple PCB Board mounted ow kA rated MOV
components. This surge protection/ filtering is
very ineffective at dealing with lightning transients
which represent the greatest risk to connected equipment.
Note! Be aware that proper fit for purpose
surge protection should be rated min Cat C (6 kV,
20 kA @8/20us), and should include a suitably tuned
inductor component which can slow down the rate
of voltage and current rise from reaching the connected
Do not confuse simple MOV and
RF Filter as providing a good level of surge protection!!
You want to pay for cheap, you get cheap!
Always remember that here is always a good reason
why something is cheap, and generally there is a
trade off in performance.
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The affordable, compact 3105 UPS
system device was designed to deliver accost effective
UPS power management solution for small office or home
Ready to switch to UPS battery
power any time it detects a power problem within the
utility, the 3105 UPS provides a short term and reliable
power backup power for wireless phones, small office
PABX or key phone systems, home office workstations,
small office desktop servers, small network nodes, point-of-sale
systems, and computer peripheral devices.
Features & Benefits:
small office and home office equipment from power outages,
surges, sags, and line noise
space with a compact design that fits easily under a
desk or can be conveniently wall-mounted, with quick
access to all power outlet receptacles
Keeps essential systems running through short term power
outages (four outlets with surge suppression and battery
• Extend UPS seervice life
with user-replaceable batteries
Phone line transient protector guards phone equipment
from "back door" power surges
Stay informed of power problems and low battery conditions
with audible alarms and remote alarm notification
• Deliver short-term mobile power with
port and cable are standard
||350 - 700VA