Delta M125HV - DC Wiring Installation

3.5.1 DC Wiring Installation
Figure 3-19: DC Wiring illustration
H4SMC4DMS
H4SFC4DMS
To ensure a better operating performance of the inverter, recommended configuration for
the PV array are shown below:
1.To ensure the inverter operates with the highest performance, the DC input voltage
should greater than the AC Line-Line Voltage * 1.5 ( or AC phase Voltage *2.6 )
If the DC input voltage is lower than above value, inverter will not operates normally.
Ex: Nonimal Vac = 600Vac, Vmp should be > 600Vac*1.5 = 900Vdc
2.PV array configuration should be designed considering the lowest environment temperature
and make sure the Voc of the PV array is within 1500Vdc.
3.Inverter will be damaged if the DC input voltage is higher than 1600Vdc, and the product
warranty will be voided.
Please read the following instructions for connecting DC connector :
• Ensure the DC conductors used are Cu and sized to the correct ampacity per
NEC or other local code.
• Strip off all wires for 6.5~7.5 mm.
• The cross-sectional area for each DC conductor is 12/10 AWG (4/6mm
2
) .
The Standard H4 Plus connector in accessories (Figure 3-19) support cable O.D.
from 5.0~7.8mm, if PV cable O.D. over 7.8mm, please refer to Table 3-3 and
contact survice to select H4SxC8DM series connector as optional accessory.
Ref. Cable
diameter
12 AWG (4 mm
2
)
10 AWG (6 mm
2
)
8 AWG (10 mm
2
)
O
O
X
X
X
O
H4SxC4DM plus connector (standard)
Support cable O.D.: 5.0~7.8mm
H4SxC8DM plus connector (optional)
Support cable O.D.: 7.5~8.8mm
Table 3-3: H4 series connector
“CLICK”
6.5 ~7.5 mm
38
Installation