SMA SUNNY BOY 240 Instruction Manual page 36

6 Electrical Connection
Mounting the Insulator
1. Push the stranded wires with the bootlace ferrules up to the stop in the premounted pin
connectors inside the insulator. The line conductor must be plugged into pin connector L,
the neutral conductor into pin connector N and the grounding conductor into the pin connector
with the symbol
☑ The bootlace ferrules are no longer visible.
2. Tighten the three screws in the insulator using a screwdriver (torque: 0.8 Nm).
3. Ensure that the individual conductors are positioned securely in the correct pin connectors of the
insulator.
Completing Mounting of the AC Field Plug
1. Push the plug enclosure onto the insulator.
☑ Both parts snap audibly together. The catch mechanism on the insulator and on the plug
enclosure must be correctly aligned.
2. Tighten the screw connection of the plug enclosure using a torque wrench and then tighten it
with two different torques:
• First tighten the screw connection with a torque of 3.3 Nm. Set the value 3.0 Nm at the scale
of the torque wrench specified by SMA Solar Technology AG.
• Then tighten the screw connection with a torque of 4.4 Nm. Set the value 4.0 Nm at the
scale of the torque wrench specified by SMA Solar Technology AG.
Tip: the indicated torque only applies to the torque wrench specified by
SMA Solar Technology AG. The value to be set on the torque wrench is lower than the actual
value (for more information on the calculation of the torque to be set, go to www.stahlwille.com).
A torque wrench consists of the following components: torque wrench (basic device),
square insertion tool and crow's foot wrench.
3. Make sure that the screw connection of the plug enclosure is securely fastened.
36 SMG-SB240-IA-en-11
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SMA Solar Technology AG
Installation Manual