Electrical Connection
Electrical Connection
AC circuit breaker requirements
120V/240V split-phase
L1, N, L2
The AC circuit breaker (not included in the A1-Hybrid inverter) is required to
protect each AC line(L1 and L2) of the A1 Hybrid series inverter. The circuit
breaker should be able to handle the rated maximum output voltage and
current of the inverter.
Refer to the table below to determine the appropriate circuit breaker size
in order to avoid potential fire hazards. The AC circuit breaker selection and
installation must follow the National Electrical Code(NEC), ANSI/NFPA 70 or local
electrical codes.
A1-Hybrid series Inverter
AC Circuit breaker
Utility
Grid Port
Ø
Terminals
Wire size permitted
Grid terminal
8AWG,600V,194
℉
(90
℃
)
for A1-Hybrid-6.0/7.0-US
6AWG,600V,194
℉
(90
℃
)
for A1-Hybrid-7.6/8.6-US
A1-Hybrid-6.0-US
Inverter model
Recommended AC branch protection
A1-Hybrid-7.0-US
A1-Hybrid-7.6-US
A1-Hybrid-8.6-US
Max. AC output current
6.4 Load connection & Autotransformer connection
The A1-Hybrid Series inverter has on-grid and off-grid functionalities. The inverter
will deliver output power through grid port and load port when the grid is on,
and it will deliver output power through load port when grid is down.
Warning!
Note that the Load port can deliver output power only when
an
auto-transformer
is connected with the inverter functions property.
Warning!
Note the power rating of back-up loads connected on the load
port can not exceed
the load power rating.
Selecting appropriate critical loads
For the nonlinear load, make sure the inrush power is within the
Load output power range.
Warning!
Ø
L1 N L2
25A
36A
32A
29A
2-pole, 45A 120/240 Vac, 15 KA
2-pole, 40A 120/240 Vac, 15 KA
2-pole, 40A 120/240 Vac, 15 KA
2-pole, 35A 120/240 Vac, 15 KA
Before the system installation, define which loads will be critical during an outage,
and then connect them to the load port. When there is an outage, only these
critical loads can be powered for essential usage. Examples of critical loads
include: lights, electrical outlets and a refrigerator.
The critical load power rating must be within the load port power rating,
otherwise the inverter will shut down with an “overload” warning.
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