6 Electrical Connection SMA Solar Technology AG
38 SB30-50TL-21-IA-en-21 Installation Manual
11. Raise all 3 terminals of the AC terminal as far as they will go.
12. Connect L, N and the protective conductor (PE) to
the AC terminal in accordance with the label.
The protective conductor must be 5 mm longer than
the insulated L and N conductors.
L and N must not be swapped.
13. Close all terminals of the AC terminal until they snap into place.
14. Check that the cable ends are firmly secured.
15. Fold down the display and fasten the screw hand-tight.
16. Hand-tighten the swivel nut firmly to the cable gland. Ensure that the cable is securely in place.
17. Attach the enclosed warning label "Risk of burns from electric arc" so that it is clearly visible on
the load disconnect unit on the AC side.
Risk of fire when connecting two conductors to a single terminal
If two conductors are connected to one terminal, this may result in a poor electrical contact which
could pose a risk of overheating or fire.
• Never connect more than one conductor per terminal.
Danger of crushing when terminals snap shut
The terminals close by snapping down fast and hard.
• Press the terminals down with your thumb, do not grip the sides of the terminal between fingers
and thumb.
• Keep fingers away from the terminals.
Danger to life due to high voltages in the inverter
• Do not switch on the miniature circuit-breaker until the PV array has been connected and the
inverter is securely closed.
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