Huawei SUN2000-25KTL-US Quick Installation Manual page 9

1. Select ground points for PV side grounding and protective grounding based on the principle of
easy operation.
2. It is recommended that 8 AWG outdoor copper-core cables be used as ground cables. Ground
cables must be securely connected.
3. It is recommended that ground cables of the inverter be connected to the near end.
4. To prevent corrosion, apply silica gel or paint to the PE terminal after connecting the ground cables.
Installing Ground Cables (Ground Points 1 and 4 Are Used as an Example)
3.2 Installing AC Output Power Cables
Cable Type
Four (L1, L2, L3, and N) or three
A single cable
NOTE
1. The SUN2000-25KTL/30KTL-US (SUN2000 for short) supports three-phase, four-wire (L1, L2,
L3, and N) and three-phase, three-wire (L1, L2, and L3) output modes. Use a connection mode
according to the local and national regulations and installation specifications.
2. Use copper cables that can withstand 90 ° C (194 ° F) or 105 ° C (221 ° F).
3. It is recommended that the AC output cable be routed through a pipe for protection.
4. The table lists only the recommended cable specifications. For more information about cable
specifications, see the SUN2000-(25KTL, 30KTL)-US User Manual.
1. Remove the waterproof cable connector from AC OUTPUT.
2. Route the AC output power cable through the prepared cable routing pipe.
3. Route the AC output power cable and the cable routing pipe through the AC OUTPUT hole at the
inverter bottom.
4. Prepare AC output power cables. Use hydraulic pliers to crimp the conductor part of the OT
terminal and cover the crimping area with heat shrink tubing or PVC insulation tape.
Ground Point
Cable Quantity
(L1, L2, and L3)
OT Terminal
1 M4
4 M6
NOTE
1. Route the PV module ground cable through the
GND hole at the inverter bottom.
2. Route the protective ground cable through the
AC OUTPUT hole at the inverter bottom.
3. When connecting the PE cable to the ground
point 4, if the SUN2000 is insecurely installed
and the AC output power cable bears the pulling
force, ensure that the last cable bearing the
force is the PE cable.
Recommended Cable Specifications
NOTE
1. The OT terminal type is M6.
2. If heat shrink tubing is used, put it through the
power cable and then crimp the OT terminal.
8
Tightening Torque
1.2 N· m
5 N· m
4 AWG