Connecting the PE cable

Precautions

• Ensure that the PE cable is properly connected. If it is disconnected or loose, electric shocks may occur.
• Do not connect the neutral wire to the enclosure as a PE cable. Otherwise, electric shocks may occur.

• The PE point at the AC output port is used only as a PE equipotential point, and cannot substitute for the PE point on the enclosure.
• After the ground cable is installed, it is recommended that the silica gel or paint be applied to the ground terminal for protection.

Additional Information

The SUN2000 has the grounding detection function. This function detects whether the SUN2000 is grounded properly before its startup, or whether the ground cable is disconnected when the SUN2000 is running. This function works under limited conditions. To ensure the safe operation of the SUN2000, ground the SUN2000 properly according to the connection requirements of the PGND cable. For some power grid types, if the output side of the inverter is connected to an isolation transformer, ensure that the inverter is properly grounded and set isolation settings to Input not grounded, with a transformer to enable the inverter to run properly.

• According to IEC62109, to ensure safe application in case of the ground cable is damaged or disconnected, connect the PE cable properly before the grounding detection function is disabled. Ensure that the PE cable meets at least one of the following requirements.
  • The PE cable is a single-core outdoor copper cable with a conductor cross-sectional area of at least 10 mm ².
  • Use cables that have the same diameter as the AC output cable, and ground the PE terminal on the AC connector and the ground screw on the enclosure respectively.
• In some countries and regions, additional ground cables are required for the SUN2000. In this case, use cables that have the same diameter as the AC output cable, and ground the PE terminal on the AC connector and the ground screw on the enclosure respectively.

Procedure

1. Crimp the OT terminal.
   • Pay attention not to damage the core wire when stripping a cable.
   • The cavity formed after crimping the conductor strip of the OT terminal needs to wrap the core wire completely. The core wire needs to contact the OT terminal closely.
   • Wrap the wire crimping area with the heat shrink tubing or the PVC insulation tape. The following figure uses the heat shrink tubing as an example.
   • When using the heat gun, protect devices from being scorched.
   Figure 5-2 Crimping an OT terminal
   

   (1) Cable	(2) Core wire	(3) Heat shrink tubing
   (4) OT terminal	(5) Crimping tool	(6) Heat gun

2. Connect the PE cable.
   Figure 5-3 Connecting the PE cable