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(1-10kVA) UPS IST3
User Manual
3.4 Installation Preparation
3.4.1 Input Breaker Selection
Add a breaker (It's recommended that the breaker is with backfeed protection and bipolar disconnection
function) or a power distribution box in the input wire of UPS, which matches with the power of UPS, to
isolate the mains. Consider the charging power of UPS and the transient current impact when power on,
the current of the selected breaker should be 1.5～2 times of the max. input current of UPS. Besides, the
selected breaker should be without the power leakage protection to avoid mis-operation. The distribution
box is better to be made by the professional company.
The recommended input breaker of (1-10kVA) UPS
Model
1kVA UPS
2kVA UPS
3kVA UPS
6kVA UPS
10kVA UPS
Index
AC input (A)
Max. current
6
12
18
36
60
Install UPS in the installation position
DC input (long backup model) (A)
Breaker
Max. current
10
37
20
37
32
42
50
39
100
65
Breaker
50
50
50
50
100
27
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