3.0 Installation
3.6 Connecting equipment to the PowerCell (continued)
requirement of your equipment is 50% greater than the capacity of the UPS!
3.6.5Once 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 your PowerCell. If this is not the case, then it must be decided which equipment should be left unprotected by the UPS. Many times, the system printer may be left unprotected. Print jobs lost in the event of utility failure can always be
3.6.6An 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 | = 120 x 2 A | = 240 VA | |
Monitor VA | = | 100 x 1.4 | = 140 VA |
Tape Drive VA | = | 120 x 1 A | = 120 VA |
|
|
| _______________ |
|
| Total | = 500 VA |
In this example, a UPS with at least 500 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.
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