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capacity of the UPS, don’t worry. The next section describes a test that you can perform
to determine whether or not your equipment and the UPS are compatible, even if the
computed
power requirement of your equipment is 50% greater than the capacity of the
UPS!
3.6.5 Once all power requirement figures have been converted to VA units and added
together, simply determine whether the power requirements of your equipment is less
than or equal to the capacity of the UPS. If this is not the case, then it must be decided which
equipment should be left unprotected by the UPS. See section 3.8 covering overloads.
3.6.6 An example of how to determine the power requirements of a computer system is
given below.
Example - labels found at system equipment rear panels
The power requirements of the example computer, monitor and external tape drive may
be calculated as follows:
Computer VA = 230 x 1 A = 230 VA
Monitor VA = 70 x 1.4 = 98 VA
Tape Drive VA = 230 x .2A = 46 VA
_______________
Total = 374 VA
In this example, a UPS with at least 374 VA capacity can be employed to protect the
computer, monitor and external tape drive. However, a UPS with somewhat lower
capacity may still be used if the following test for proper operation is successful.
3.6.7 Once you have determined that your equipment and the UPS are compatible, plug
your equipment into the UPS’s rear panel output receptacles.
230 VAC, 70W
50/60
230 V~ .2A
230 V~ 1A