External Grounding Connection - Soleil SRT 75K User Manual

Name
AC
output
wire
Internal grounding
wire
RS485
communication wire
External grounding
wire
⚫ The cables in above table are based on UL copper wire. If other wires are used, please replace them
according to the standard. The wire materials selected by SIEL have passed the national standard
certification or UL certification.
⚫ If the recommended terminal model is not adopted, please check with SIEL for compatibility.
⚫ If using the aluminum wire, it should adopt copper-aluminum transition terminal.

3.6.3 External Grounding Connection

⚫ Since the inverter is with no transformer, it is required that the positive and negative poles of the
PV string cannot be grounded, otherwise the inverter will not operate normally.
⚫ Before the AC side, PV string and communication connection, please connect the external
grounding wire first.
⚫ The grounding connection of the external grounding terminal cannot replace the connection of the
internal grounding terminal. Make sure that both of them are grounded reliably, otherwise Siel
Company will not in charge of the responsibility for possible consequences.
IV438E REV.01 Issued: 2022/11/09
Type
Outdoor multi-core
L1/L2/L3 cable or single-core
cable
Outdoor single-core
N
cable
Outdoor cable
Shielded twisted pair
Outdoor cable
User Manual Soleil SRT/SPX 75K-150K
Recommended wire diameter(mm
Outdoor three-core cable: 70~240 (Max. outer
diameter<56mm).
Outdoor single--core cable: 70~240 (Max. outer
diameter<26mm);
50~150(Max. outer diameter <25mm)
Conductor cross-sectional area≥S/2 (S is the
conductor cross-sectional area of AC output wire)
(Max. outer diameter <25mm)
2
2*0.3 mm (Maximum outer diameter<14mm)
Conductor cross-sectional area≥S/2 (S is the
conductor cross-sectional area of AC output wire)
)
2
Pag. 39 of 74 +FR