Connecting the Sunny Multigate to the Utility Grid

Connect the AC cable of the utility grid to the connecting terminal plate of the Sunny Multigate labeled Grid according to the following procedure:

Cable requirements:

  • Only use copper cables.
  • Use only cables made of solid wire or stranded wires.
  • Temperature-resistant up to at least +90°C
  • Conductor cross-section: 1.5 mm² to 6.0 mm²

Requirement:

  • The Sunny Multigate must be correctly installed in the distribution box.
  • If an external residual-current device is required, install a type A residual-current device which trips at a residual current of 100 mA or higher (for details on selecting a residual-current device, see the Technical Information ""Criteria for Selecting a Residual-Current Device"" at www.SMA-Solar.com).
  • If the Sunny Multigate is being commissioned in Italy, an external grid and PV system protection (SPI) in accordance with the CEI 0-21 standard must additionally be installed.

Overvoltage category:

The Sunny Multigate can be deployed in utility grids of installation category III or lower, as defined in IEC 60664-1. This means that the Sunny Multigate can be permanently connected to the origin of an utility grid in a building. In installations involving long outdoor cable routes, additional measures for overvoltage suppression must be taken so that the overvoltage category is reduced from IV to III.

Procedure:

  1. DANGER

    Danger to life due to electric shock

    1. Ensure that the circuit breaker is switched off and that it cannot be reconnected.
  2. Route the AC cable of the utility grid through one opening at the bottom of the distribution box to the terminal Grid of the Sunny Multigate.
  3. Dismantle the AC cable to the desired length.
  4. Strip 8 mm insulation off each of the three conductors of the AC cable of the utility grid.

  5. NOTICE

    Damage to the Sunny Multigate due to incorrectly connected conductors

    If PE and L or N are swapped, the Sunny Multigate could be damaged during commissioning.

    1. Be sure to observe the terminal labels on the Sunny Multigate.
    2. Connect all conductors in accordance with the terminal labels.

      • Connect the grounding conductor of the AC cable to the terminal PE of the Sunny Multigate. Make sure that the conductor is inserted into the terminal right up to the stop.

      • Connect the line conductor of the AC cable to the terminal L of the Sunny Multigate. Make sure that the conductor is inserted into the terminal right up to the stop.

      • Connect the neutral conductor of the AC cable to the terminal N of the Sunny Multigate. Make sure that the conductor is inserted into the terminal right up to the stop.

  6. Tighten all three screws of the connecting terminal plate using a flat-blade screwdriver (torque: 0.6 Nm).
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  7. Make sure that all terminals are correctly allocated.
  8. Make sure that all conductors are securely in place.
  9. Connect the grounding conductor of the Sunny Multigate to the equipotential bonding of the AC distribution board.
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