3PH ON-GRID solar inverter
15
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IPSPV33-ONGI-manual_ENG-R0
7.10.2020
3.
Check whether the PV array cable connection polarity is correct with a voltmeter
whose DC voltage measurement range is over 1000 V, and verify that the open-
circuit voltage does not exceed the specification. When the ambient temperature is
above
10°C, the open-circuit voltage of PV arrays can’t exceed 90% of the maximum DC
voltage of the inverter. Otherwise, at the low temperatures, the voltage of PV arrays
may exceed the maximum input voltage of the inverter and cause damage to the
inverter.
4.
Disconnect the circuit breaker on the DC side and connect the PV input cable to the
inverter separately.
5.4 AC Connection
WARNING !
Ensure that electrical connections are in compliance with the local
national and local standards.
WARNING !
The uncharged metal parts in PV power generation systems consist of
PV module bracket, the metal case of the inverter, which should be
grounded reliably. The grounding pole should meet the standard
requirements.
The grounding parts of multiple inverters and PV arrays should be
connected to the same grounding bus, building a reliable equipotential
connection.
CAUTION
According to the requirement of EN50178, the right side of the inverter
has a second earth terminal, which can be connected by the
combination screws M4 × 8 with flat pad and spring pad.
Wiring on the AC side
1. Pass the appropriate length of cable through the waterproof connector cap and shell.
Only apply to multistrand copper wire, length of the earth wire should be 5 mm longer
than the live wire and zero wire.Strip the cable insulation about 7 mm (As shown in
the figure below).
2. Fix L1,L2,L3,N and PE wires to the corresponding AC terminals with a screwdriver
and ensure that the PE wire is properly grounded (As shown in the figure below).
