SMA SUNNY ISLAND 8.0H - Structure of the files

6 Electrical Connection SMA Solar Technology AG
44 SI80H-60H-OffGrid-IA-en-11 Installation Manual
6. Insert L into the AC2 Gen/Grid L terminal as far as it will go and move the lever of the terminal
downward.
7. In the case of a three-core cable, insert the PE into the PE terminal as far as it will go and move
the lever downward.
8. Tighten the swivel nut of the cable gland.
6.11 Inserting Filler-Plugs
• Seal unused enclosure openings with filler-plugs. The enclosure openings will then correspond
to the IP54 degree of protection.
6.12 Installing Protective Devices for Loads
Install the following protective devices for the AC sub-distribution:
• Install miniature circuit-breakers with the B16 maximum tripping characteristic.
• Install the residual-current device type A in accordance with the applicable local standards and
directives.
• If the applicable local standards and directives require a fuse-switch-disconnector, install a
fuse-switch-disconnector.
• If a fuse-switch-disconnector is installed, dimension the fuse links. Note that currents from the AC
sources in the stand-alone grid, from the external energy source and from the off-grid inverter
can be superimposed.
• For three-phase stand-alone grids, distribute the load power as evenly as possible across the
three line conductors.
5.
Danger to life from electric shock due to incorrect connection of the neutral conductor
If you connect the neutral conductor incorrectly, the earthing concept of the off-grid system will
not work. In a TN system, the neutral conductor must be permanently connected between the
AC1 and AC2 terminals. In a TT system, the internal transfer relay must disconnect the neutral
conductor between the AC1 and AC2 terminals when the stand-alone grid is not connected to
the external energy source.
• In a TN system, insert the neutral conductor into the AC2 Gen/Grid N terminal as far as
it will go and move the lever of the terminal downward.
• In a TT system, insert the neutral conductor into the AC2 Gen/Grid N
TT
terminal as far
as it will go and move the lever of the terminal downward.