Connecting the Inverter to the Utility Grid


Qualified person

Requirements:

  • Only the terminal block supplied may be used for the AC connection.

  • The connection requirements of the grid operator must be met.

  • The grid voltage must be within the permissible range. The exact operating range of the inverter is specified in the operating parameters.

Procedure:

  1. Disconnect the AC circuit breaker and secure it against reconnection.
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  3. Unscrew the swivel nut from the cable gland for the AC connection at the connector cap.
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  5. Thread the swivel nut over the AC cable.
  6. Thread the AC cable through the cable gland of the AC connection:
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    • If the external diameter of the cable is 5 mm to 7 mm, thread the AC cable through the cable gland directly.

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    • If the external diameter of the AC cable is 8 mm to 13 mm, first remove the inner sealing ring from the cable gland and then thread the AC cable through the cable gland. When doing so, ensure that the outer sealing ring is positioned correctly in the cable gland.

  7. Dismantle 70 mm of the AC cable.
  8. Shorten L and N by 5 mm each. Thus, the grounding conductor will be released from the terminal block last when tensile load is applied.
  9. Strip 15 mm of the insulation of L, N and the grounding conductor.
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  11. Connect L, N and the grounding conductor to the terminal block for the AC connection in accordance with the labeling. When doing so, ensure that the conductors are plugged completely into the terminals up to the insulation. Tip: To release the conductors from the terminals, the terminals must be opened. To do this, stick a flat-blade screwdriver (blade width: 3 mm) as far as it can go into the rectangular opening behind the terminal.
  12. Ensure that all terminals are allocated to the correct conductors.
  13. Make sure that all conductors are securely in place.
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  15. Plug the terminal block with the connected conductors for the AC connection into the slot in the inverter until the terminal block clicks into place.
  16. Ensure that the terminal block is securely in place by slightly pulling it.