3. Installation
.25.
.24.
3.4.3.2 Wiring procedure
3. Installation
CAUTION
RISK OF ELECTRIC SHOCK.
Prior to starting the wiring procedure, ensure
that the three-pole circuit breaker is switched off and cannot be reconnected.
NOTE
Damage or destruction of the inverter's electronic components due to
moisture and dust intrusion will occur if the enclosure opening is enlarged.
CAUTION
Risk of fire if two conductors are connected to one terminal. If a
connection of two conductors to a terminal is made, a fire can occur.
NEVER CONNECT MORE THAN ONE CONDUCTOR PER TERMINAL.
NOTE
Use M10 crimp terminals to connect to the inverter AC terminals
.
The steps to assemble the AC grid terminals are listed as follows:
Figure 3.22 Strip AC cable
PE
L
｝
S2
S1
NOTE:
S2 (insulation stripping length) is 2mm-3mm longer than S1.
(OT cable terminal crimping area)
2. Strip the insulation of the wire past the cable crimping area of the OT terminal, then use
a hydraulic crimp tool to crimp the terminal. The crimped portion of the terminal must be
insulated with heat shrinkable tube or insulating tape.
1. Strip the end of AC cable insulating jacket about 300mm then strip the end of each wire.
NOTE:
If chosing aluminum alloy cable, you must use copper aluminum transfer
terminal or an anti-oxidant grease in order to avoid direct contact between
copper bar and Aluminum alloy cable. (Please select a copper aluminum
transfer terminal based on your cable specification).
Figure 3.26 AC terminal installation
L1
L2
L3
copper terminal of cable
3. Leave the AC breaker disconnected to ensure it does not close unexpectedly.
4. Remove the 6 screws on the inverter junction box and remove the junction box cover .
Figure 3.24 Remove the junction box cover
5. Insert the cable through the nut, sheath, and AC terminal cover. If using conduit, remove
plastic nut to expose hole for conduit connection. Connect the cable to the AC terminal block.
Tighten the screws on the terminal block. The torque is 7.4-14.7 ft.lbs.
Figure 3.25 wiring
PV+
PV-
flat washer
lock washer
nut
