Connecting the AC Power Cable

Qualified person

Always proceed as follows to connect the power cables.

Cable requirements:

  • Copper wire
  • Recommended conductor cross-section: 10 mm²
  • Conductor cross-section: 1.5 mm² to 16 mm²
  • Cable diameters: 9 mm to 18 mm

WARNING

Danger to life from electric shock due to incorrect connection of the neutral conductor

The neutral conductor of the external energy source is firmly connected to the neutral conductor of the Sunny Island inverter on connection AC2 Gen/Grid N. Upon disconnection of the external energy source, the Sunny Island only disconnects the line conductor on connection AC2 Gen/Grid N. The Sunny Island disconnects all poles from the external energy source on connection AC2 Gen/Grid NTT. If the neutral conductor is incorrectly connected on connection AC2, the protective functions in the system can fail. This can result in death or serious injury.

  1. Always connect the neutral conductor to the connection AC2 Gen/Grid NTT in systems for increased self-consumption.
  2. Always connect the neutral conductor to the connection AC2 Gen/Grid NTT in battery backup systems.
  3. Always connect the neutral conductor of the generator to the connection AC2 Gen/Grid N in off-grid systems.

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.
  2. Do not grip the entire terminal block for the AC cable.
  3. Do not place your fingers under the locking levers.

Procedure:

  1. Move the levers of the terminals upward at AC1 or AC2.
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  2. When connecting the cable to connection AC1, attach the M25 cable gland to the AC1 enclosure opening using the counter nut (torque: 7 Nm).
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  3. When connecting the cable to connection AC2, attach the M25 cable gland to the AC2 enclosure opening using the counter nut (torque: 7 Nm).
  4. Remove the cable jacket and strip off 13 mm of the the insulation of all conductors.
  5. Lead the cable through the cable gland into the Sunny Island.
  6. Connect the insulated conductors to the terminals AC1 Loads/SunnyBoys or AC2 Gen/Grid:

    • Insert the neutral conductor as far as it will go into terminal N or NTT and push the lever down.

    • Insert the line conductor as far as it will go into terminal L and push the lever down.

  7. Connect the grounding conductor ( > Connecting the Grounding Conductor).
  8. Ensure that the seal insert is positioned correctly in the cable gland.
  9. Tighten the swivel nut of the cable gland (torque: 4 Nm).
Connecting the DC Power Cable
Connecting the Grounding Conductor