Power One AURORA MICRO-0.25-I-OUTD-US-208/240, Руководство пользователя, Страница: 41 / 78

Page
40
of
76 MICRO-0.25/0.3-I-OUTD-US-208/240 BCG.00612_AB
Part
3 Mounting and Wiring
3.3 WIRING DETAILS
3.3.1 L
OAD
P
ROTECTION
S
WITCH
(AC
DISCONNECT SWITCH
)
To protect each AC connection line of the MICRO inverter, it is required to install a device for
protection against overcurrent with the following characteristics:
Table 3-1: Overcurrent device recommended characteristics
Protection breaker
rating
6A 10A 16A 20A
Max number of
Inverters
@240VAC
MICRO-
0.25
4 7 12 15
MICRO-
0.3
3 6 9 12
Max number of
inverters
@208VAC
MICRO-
0.25
4 6 10 13
MICRO-
0.3
3 5 8 11
The dimensions of the thermal-magnetic circuit breaker should be determined by the number of
MICRO inverters connected to a single AC line. A 20A thermal-magnetic circuit breaker represents
the maximum value permitted for installation in a single AC line, sized based on the AC cable cross
section (10 AWG).
It is the installer’s responsibility to adequately size the overcurrent protection,
based on the number and types of MICRO inverters in the system (see Table
3-1 ). The maximum thermal-magnetic circuit breaker current rating is 20A for
each AC line.