57
8) Once the above steps are accomplished, turn on the external battery cabinet breaker, and then
turn on the External Battery Breaker as well as the Main Battery Breaker on the UPS. Should
the breakers trip a) check wiring for wiring errors, b) check breakers for possible defective
breaker.
9) Turn on the UPS Input AC Breaker and start UPS by rotating main power switch clockwise to
the ON UPS position.
Note:
If more than one battery cabinet is to be used, the battery cabinets will be cascaded according to
special instructions included with the battery cabinets.
Dimensions:
Mesta Electronics offers three sizes of battery cabinets, size 1, 2, and 3. The size 1 and
2 battery cabinets are identical in size to the size 1 and size 2 UPS cabinets, measuring 32" (size 1) or
38" (size 2) wide X 28" (size 1) or 32” (size 2) deep X 75" high. The size 3 battery cabinets measure
38” wide X 36” deep X 75” high. Size 1 and size 3 cabinets contain 38 amp-hour batteries while size 2
cabinets contain 65 amp-hr batteries.
Backup Times:
The auxiliary battery cabinets will increase the backup times for the UPS according to
the magnitude and the power factor of the load. For the sake of comparison, Table 9 below
demonstrates the amount of time (in minutes) that the UPS internal batteries will power the UPS
inverter based upon the load (in kilowatts) expressed as a percentage of the rated load of the UPS
model. Several examples of model numbers are included in Table 9:
Table 9 UPS Internal Battery Time at Various Loads
UPS MODEL NUMBER
100% Load
70% Load
50% Load
10000/3-20-1 22
36
56
15000/3-20-1 13
21
33
20000/3-20-1 9
14
22
25000/3-20-1 6
10
16
25000/3-20-2 13
21
34
30000/3-20-2 10
17
26
50000/3/20-2 N/A
N/A
N/A
Table 10 lists the total backup time when a battery cabinet is added to a UPS. The additional battery
capacity adds to the internal capacity to yield much longer runtimes. All of the times indicated are in
minutes and represent systems loaded to 100% and to 50% of their rated load. Actual times you
receive with your system will vary depending upon your actual load.
Table 10 Total System Backup Time with Single External Battery Cabinet
MODEL
# BC20-38 BC40-38 BC20-65 BC40-65 BC60-38 BC80-38 BC100-38
100% 50% 100% 50% 100% 50% 100% 50% 100% 50% 100% 50% 100% 50%
10000/3-20-1 56 139 95 238 83 208 159 360 139 330 187 420 238 540
15000/3-20-1 33 81 56 139 49 122 93 233 81 204 109 274 139 330
20000/3-20-1 22 56 38 95 33 83 63 159 56 139 75 187 95 238
25000/3-20-1 16 41 28 71 25 62 47 118 41 104 56 139 71 177
25000/3-20-2 25 62 37 94 34 84 58 144 51 129 66 166 82 206
30000/3-20-2 19 49 29 74 26 66 45 113 40 101 52 130 65 162
50000/3-20-2
13 34 11 28 17 41 22 56
Specifications:
The maximum amperage that each cabinet will allow is dependent upon the UPS to
which it is attached. A cabinet, therefore, will utilize different sizes of breakers according to the
