Darfon G320, Руководство пользователя, Страница: 6 / 14

G 3 2 0 M i c r o I n v e r t e r U s e r M a n u a l
G 3 2 0 + 1 T c a b l e U s e r
Manuals-non monitoring system(for BD use)-08023
© 2 0 1 6 D a r f o n E l e c t r o n i c s C o r p . p . 6 / 1 4
• Torque wrench & sockets for mounting hardware
• Adjustable/open-ended wrench (for end caps)
Compatibility and Capacity
G320 micro inverters are electrically compatible with PV modules that have a
voltage range of 24V to 60V and a maximum wattage of 350W although 320
watts is considered optimal. Please refer to the ‘Compatible PV Module
Calculator’ on the website at www.darfonsolar.com to verify the PV module is
electrically compatible.
Before ordering the PV module, make sure the connector type is compatible with
the micro inverter.
Electrical Compatibility
Model PV MPPT Voltage Range PV Module Connector Type
G320 24V to 45V MC4 Locking
[Male-Anode (+), Female-Cathode (-)]
Voltage and Capacity
AC Trunk Cable Overcurrent Protection 240V (Single Phase)
10AWG 30Amp Breaker 19 MI
12AWG 20Amp Breaker 12 MI
WARNING
DO NOT exceed the maximum
number of micro inverters in
an AC branch circuit as listed above.
CAUTION
Each AC branch circuit must be
protected by a dedicated circuit
breaker of 30A or less if using 10 AWG trunk
cable, or 20A or less if using 12 AWG trunk cable.
AC Trunk Cable
There are different types and options for AC trunk cables. Depending on the
orientation of the installation, the AC trunk cable can be in portrait or landscape
format. Trunk cables can also consist of three pins (three wires) or four pins (four
wires). Currently the four-pin AC trunk cable is used.
Pin Wire Color Wire Usage
1 Black L1
2 Red L2
3 Green Ground
4 White Neutral
Grounding Options
Option 1: Integrated Grounding
Integrated grounding eliminates the need to install Grounding Electrode
Conductor (GEC) to each G320 by completely isolating the internal DC circuit
from the AC circuit and ground. DC ground faults are detected on either the
positive and/or negative conductors of the DC circuit by a Ground Fault Detection
Interrupter Insulation Monitor (GFDI IM). If the GFDI IM detects a ground fault
has occurred to the PV input, the micro inverter will automatically disconnect all
conductors and cease supplying output power. In accordance with NEC 690.35,
installers can build ungrounded arrays where only an Equipment Grounding
Conductor (EGC) is required to connect or bond non-current carrying metal
equipment together. The EGC grounding process is completed via the grounding
connection of G320 4-wire AC cable to the AC trunk cable. The PV module will
still need to be grounded according to the module manufacturer’s instructions.
Option 2: GEC Grounding
Although the G320 offers integrated grounding (UL 1741 certified), it also comes
with a grounding terminal clip for any localities that do not accept integrated
grounding. The micro inverter manufacturer will not be held responsible for
improper installations that do not have local AHJ and/or Utility operational
approval.
UP TO 19 MICROINVERTERS IN A CIRCUIT
INTEGRATED GROUNDING
(GEC NOT REQUIRED)
NEUTRAL GROUND
JUNCTION
BOX
METER
AC DISTRIBUTION PANEL
2-POLE 30A
CIRCUIT
BREAKER
Black=L1
Red=L2
White=Neutral
Green=Ground
L1
L2
INTEGRATED GROUNDING