SMA SUNNY BOY 3.0-US Instructions D'installation page 50

6 Electrical Connection
8.
Danger to life due to electric arc
The terminal block must be fastened to the slot with two screws. If the terminal block is not
correctly mounted and comes out of the slot, an electric arc can form. An electric arc can
cause life-threatening burns and can cause fire.
• Mount the terminal block using the two screws as described in the following.
9. Tighten the screws of the terminal block using a flat-
blade screwdriver (blade width: 3.5 mm (0.14 in))
(torque: 0.3 Nm (2.65 in-lb)).
10. Ensure that the terminal block is securely in place and the screws are tightened.
11. Strip off the conductor insulation by 18 mm (0.71 in).
12. In the case of fine stranded wire, provide each conductor with a bootlace ferrule.
Connection of conductors of finely stranded wire
13.
To connect conductors made of finely stranded wire, each terminal point must be opened.
• First insert the connector into the terminal point all the way to the lock (round
opening). Then insert a flat-blade screwdriver (blade: 3.5 mm (0.14 in)) as far as it
can go into the actuation shaft (rectangular opening). Hereby the lock opens and
the conductor can be placed into the terminal point as far as possible. After the
connection has been made, the flat-blade screwdriver must be pulled out of the
actuation shaft.
14.
Fire hazard due to faulty conductor connection
If the conductors are inserted into the actuation shafts (right-angled openings), a fire may
occur during inverter commissioning.
• Connect the conductors to the terminal block as described in the following.
15. Connect the conductors to the terminal block in
accordance with the labeling. Insert each conductor
into the corresponding terminal point (round
opening) up to the stop. Always connect the positive
terminal and the negative terminal of a string to the
same input, and keep in mind that the terminals C+
and C- of inverters with two DC inputs must not be
assigned.
50 SBxx-1SP-US-41-IA-xx-12
DANGER
WARNING
SMA Solar Technology AG
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Installation Manual