DASS 3.0i LV (DSP-123i-ODS)
User manual
Copyright © DASS Tech Co., Ltd
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RS485 interface
DVCA
CT interface
DVCA
Logic interface
DVCA
WiFi/GPRS/Ethernet interface
DVCA
4.1. Electrical connection
Figure4-1 Shows the flowchart for connecting cables to the inverter.
4.2. Connecting PGND Cables
Connect the inverter to the grounding electrode using protection ground
(PGND) cables for grounding purpose.
The inverter is transformer-less, requires the positive pole and
negative pole of the PV array are NOT grounded. Otherwise it will cause
inverter failure. In the PV power system, all non current carrying metal
parts (such as: PV module frame, PV rack, combiner box enclosure,
inverter enclosure) should be connected to earth.
Attention
Prerequisites:
The PGND cables are prepared (
≥
4mm
²
outdoor power cables are
recommended for grounding purposes),the color of cable should be yellow-green.
Procedure:
Step 1
Remove the insulation layer with an appropriate length using a wire
stripper, as shown in Figure 4-2.
Figure4-2 Preparing a ground cable (1)
Start
Connect PGND
cable
Connect DC
input cable
End
Connect AC output
power cable
Connect communication
cables (not mandatory)
