MY-A Series (10kVA-20kVA) UPS
User Manual
3 Installation
25
shows the min. recommended wire cross-sectional area. Select the wires and breakers according to
Table3-1
UPS max. steady state phase current
Type
10kVA
15kVA
20kVA
AC input (A)
35.5
65.7
81.7
Bypass input (A)
35.5
65.7
81.7
DC input (A)
54.8
82.2
109.6
AC output (A)
30.3
45.5
60.6
3.2.5 Select Input Breaker
We suggest to add a breaker (we suggest to select the breaker with feedback double pole
disconnection equipment) that matches the UPS power at the front of the UPS input to insulate the
mains. Considering the UPS charge power and the impact current while power on, the selected
breaker must be 1.5 to 2 times of UPS input max. current, and cannot with leakage protection, which
is to avoid wrong action of breaker. The breaker of DC input should be select more than the 250V DC.
The selection of breaker, please reference Table3-2.
Table3-2
Recommended input breaker list
Type
10kVA
15kVA
20kVA
AC input (A)
63*3P
100*3P
100*3P
Bypass input (A)
63*3P
100*3P
100*3P
DC input (A)
100*3P
125*3P
175*3P
AC output (A)
63*3P
100*3P
100*3P
Withstanding voltage value of recommended AC and Bypass input breaker and AC output breaker is
250Vac, DC input breaker is
250Vdc.
