Connecting the Inverter to the Utility Grid

Requirements:

  • All electrical installations must be carried out in accordance with the local standards and the National Electrical Code® ANSI/NFPA 70 or the Canadian Electrical Code® CSA C22.1.

  • 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. DANGER

    Danger to life due to electric shock

    1. Ensure that the three-pole circuit breaker is switched off and cannot be reconnected.
  2. Release all screws of the lower enclosure lid using an Allen key (AF 3).
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  3. Lift and remove the lower enclosure lid from below.
  4. Remove the adhesive tape from the enclosure opening for the AC connection.

  5. NOTICE

    Damage to the inverter due to moisture and dust intrusion

    Electronic components in the inverter can be destroyed or damaged as a result of dust or moisture intrusion.

    1. Do not enlarge the enclosure opening.
  6. Insert the conduit fitting into the opening and tighten from the inside using the counter nut.
  7. Attach the conduit to the enclosure opening.
  8. Insert the AC cable through the conduit into the inverter.
  9. Strip the cable insulation by 12 mm to 13 mm (0.5 in).
  10. Open all locking levers of the connecting terminal plate right up to the stop.

  11. 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.
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  12. Connect the equipment grounding conductor to the terminal .
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  13. Depending on the grid configuration, connect the neutral conductor to connecting terminal plate N ( > Requirements for the AC Connection).
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  14. Connect the conductors L1, L2 and L3 to the terminals L1, L2 and L3 according to the label. Ensure that the assignment is correct.

  15. CAUTION

    Danger of crushing when locking levers snap shut

    The locking levers close by snapping down fast and hard.

    1. Press the locking levers of the terminal block for the AC cable down with your thumb only. Do not grip the entire terminal block for the AC cable between finger and thumb and keep fingers out from under the locking levers.
  16. Ensure that the correct conductors are assigned to all the terminals.
  17. Ensure that all locking levers of the connecting terminal plate are closed and all conductors are tightly connected.
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    >  Connecting Additional Grounding