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Electrical Connection
Electrical Connection
The uncharged metal parts in the photovoltaic power generation system,
including the photovoltaic substrate bracket and the metal shell of the
inverter, should be reliably grounded. The grounding part of multiple
inverters and photovoltaic array shall be connected to the same grounding
bus to establish reliable equipotential connection.
a) Select 16
-
25
mm
²
yellow and green conductor with proper length
by wire cutter and OT copper terminal. Use wire stripper to strip the
insulation layer of the conductor end. The stripped length shall be as
shown below:
b) Tighten the stripped end and pull the heat-shrink tubing over the
grounding cable. The heat-shrink tubing must be at below cable section.
WARNING!
Be sure the ground wire must be
connected!
6. Electrical Connection
c) Insert the stripped section into the OT copper terminal and crimp
with crimping tool.
d) Pull the heat-shrink tubing over the stripped section of OT terminal
and use hot-air blower to shrink it so that it can be in firm contact with OT
terminal.
Ø
Step 1: Make the grounding cable
A=B+(2~3mm)
B
C=A+2cm
Heat-shrink tubing
a) b)
c) d)
6.1 Groundng Connection
Ø
Step 2: Connect the grounding cable to the inverter.
a) Connect the grounding cable to the inverter and fix it with torque
12 N·m.
6.2 PV String Connection
WARNING!
Before connecting the inverter, make sure that the open circuit
voltage of the photovoltaic string shall not exceed 1100 V
under any conditions, otherwise, the inverter will be damaged.
WARNING!
Do not ground the positive or negative pole of the PV string,
otherwise it will cause serious damage to the inverter.
WARNING!
Make sure that the positive and negative poles of the PV string
are correctly connected with the corresponding identification
of the inverter.
