Connecting the Inverter to the Utility Grid


Qualified person

Requirements:

  • The connection requirements of the grid operator must be met.
  • The grid voltage must be in the permissible range. The exact operating range of the inverter is specified in the operating parameters.

Procedure:

  1. Disconnect the circuit breaker from all three line conductors and secure against reconnection.
  2. Unscrew all six screws of the enclosure lid using an Allen key (AF 5) and remove the enclosure lid. Ensure that the conical spring washers are retained.
  3. Remove the adhesive tape from the enclosure opening for the AC cable.
  4. Attach the M32x1.5 cable gland to the enclosure opening for the AC cable using a counter nut.
  5. Route the AC cable into the inverter through the cable gland. If necessary, slightly loosen the swivel nut of the cable gland.
  6. Dismantle the AC cable.
  7. Shorten L1, L2, L3 and N by 5 mm each.
  8. Strip 18 mm of the insulation from each of L1, L2, L3, N and the grounding conductor.
  9. Push the safety levers of the AC connecting terminal plate right up to the stop.
  10. CAUTION

    Risk of fire if two conductors are connected to one terminal

    If you connect two conductors to a terminal, a fire can occur due to a bad electrical connection.

    1. Never connect more than one conductor per terminal.
  11. Connect PE, N, L1, L2 and L3 to the connecting terminal plate for the AC cable according to the labeling. The direction of the rotating magnetic field of L1, L2 and L3 is not relevant.
  12. CAUTION

    Danger of crushing fingers when locking levers snap shut

    The locking levers close by snapping down fast and hard.

    1. Press the locking levers of the connecting terminal plate for the AC cable down with your thumb only.
    2. Do not grip the entire connecting terminal plate for the AC cable.
    3. Do not place your fingers under the locking levers.
  13. Make sure that all conductors are securely in place.
  14. Tighten the swivel nut of the cable gland.