Install Manual

Table Of Contents

6 Electrical Connection

SMA Solar Technology AG

Installation ManualSTP33-62-US-41-IA-en_es-1128

8. Connect the equipment grounding conductor of the utility grid to the equipment grounding

terminal:

• Strip the insulation of the equipment grounding conductor by 27mm (1.06in).

• Slightly loosen one of the screws with which the clip and connection plate are connected

to the equipment grounding terminal and to completely remove the other screw (TX25).

• Then place the equipment grounding conductor onto the connection plate, route the clip

via the equipment grounding conductor and tighten both screws (TX25, torque: 6Nm

(53in-lb)).

• Ensure that the conductor is on the connection plate.

9. Strip off the conductor insulation of L1, L2, L3 and, if applicable, N by 27mm (1.06in) each.

10. In the case of finely stranded wire, provide conductors L1, L2, L3 and, if applicable, N with a

bootlace ferrule.

11. Depending on the grid configuration, connect L1,

L2, L3 and, if necessary, N to the terminals

according to the label. To do so, position each

conductor as far as they will go into the

corresponding terminal and tighten the screw on the

terminal (TX30, length: 50mm (2in), torque:

14Nm (126in-lb)).

12.

WARNING

Danger to life due to electric shock caused by the presence of a bridge

between N and the enclosure when connecting a utility grid with neutral

conductor

The inverter is delivered with a bridge between N and the enclosure as standard. The

bridge is absolutely essential if the connection to a utility grid is established without a neutral

conductor.

• If the connection to a utility grid is established with a neutral conductor, the bridge must

always be removed as described in the next step.

13. When N is present and connected to the

corresponding terminal, remove the bridge installed

as standard between N and the enclosure ( ). To

do so, unscrew the screw of the terminal N and the

screw of the grounding point ( ) and remove the

bridge from the inverter (TX30, length: 50mm

(2in)).

14. Ensure that the correct conductors are assigned to all the terminals.

15. Make sure that all conductors are securely in place.

ENGLISH