Connect the power cable for backup operation
Qualified person
If there are multiple inverters in the system but backup loads are only connected to one of them, the backup loads should be connected to the inverter that is configured as the System Manager.
Requirements:
The power cables for backup operation must be pre-assembled.
Additionally required material (not included in the scope of delivery):
For secure power supply operation: 1 standard commercial socket
For battery-backup operation: SMA Backup 3P Kit or SMA Backup 1P
Procedure:
- Disconnect the inverter from all voltage sources ( > Check that the inverter is de-energized).
- Remove the filler plug from the cable gland.
- Unscrew the union nut at the back of the inverter from the cable gland and lead the cable through.
- Feed the cable through the cable gland into the interior of the inverter.
- Dismantle the cable by 100 mm.
- Strip off the conductor insulation by 10 mm to 12 mm each.
- Connect the grounding conductor to the busbar , as short as possible without the conductor being under voltage. To do so, insert the conductor into the busbar against the stop and tighten the screw (PZ2, minimum torque 2.5 Nm).
- Connect N and L to the terminal block SPS according to labeling. To do this, unlock the terminal with a flat-blade screwdriver (3.5 mm).
- For secure power supply operation: Ensure that the cable bridge is fitted between N and the busbar .
- For battery-backup operation: If present, remove the grounding conductor connection between N and the busbar grounding conductor connection. To do this, unlock the terminal with a flat-blade screwdriver (3.5 mm).
- Tug lightly to ensure that all conductors are secured in the terminals.
- Tighten the union nut on the cable gland hand-tight.
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