30
29
Chart 5.36
Chart 5.37
5.4.9 Connection of Dry contact
The dry contact is used to communicate with external devices (such as remote start hot
water heater). The wiring steps are as follows:
Step1: Unscrew the swivel nut from the cable gland.
Step2: Thread the swivel nut over the cable.
Step3: Press the cable support sleeve out of the cable gland.
Step4: Remove the filler plug from the cable support sleeve.
Step5: Route the network cable through an opening in the cable support sleeve.
Step6: Thread the network cable through the cable gland.
Step7: Thread cables into connection terminal of the inverter, then press the terminal by
relevant tools and make sure cables are firmly.
Step8: If no other cables need to be installed, lock the waterproof cover to the inverter
with screws.
Step9: Screw the swivel nut onto the waterproof cover.
Note:
If the cable such as “Dry contact” cable is not used, please do not remove the filler plug
from the cable support sleeve.
5.4.10 Grounding connection
SPH must be grounded by cable, the grounding point is showed as follow, and the
minimum grounding cable wire diameter is 10.0mm2.
Chart 5.38
Chart 5.39
PV Array Grounding
Grounding conductor of PV panel brackets must be firmly connected to earth at PV array
side and inverter side and SP side. The sectional area of grounding conductor should be
equal to the sectional area of DC grounding conductor. The minimum wire diameter is
10.0mm2.
DC Grounding
Select the DC Grounding mode according to the local standard and use the PV grounding
terminal box and DC Grounding wires of the same specification.
Grounding Device
If the positive pole or the negative pole of PV array need to be grounded in the PV system,
the inverter output should be insulated by Isolation Transformer. Isolation transformer
must conform to IEC62109-1,-2 standard.
Connection as below:
PV array
Inverter
Transformer
Grid
L
N
PE
