SMA SB 240 - Manual (Page 36)

• Hint: The given torque setting 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.
6.5 Connecting Additional Grounding
If a second grounding conductor or equipotential bonding is locally required, you can also ground
the inverter enclosure. This prevents touch current if the original grounding conductor fails.
You can ground each inverter separately or connect several inverters with one another.
Procedure:
• Connect the grounding conductor to the equipotential bonding of the AC distribution board.
6.6 Connecting the First Inverter to the Sunny Multigate
6.6.1 Connecting the AC Cable to the AC Field Plug or to the
Junction Box
There are two ways to connect the first inverter to the Sunny Multigate on the AC side:
• Connection with the AC field plug included in the delivery
• Connection via a junction box with integrated feed-through terminal
Cabling with AC Field Plug
Figure 18: AC cabling of the entire PV system with AC field plug
Procedure:
1.
Danger to life due to electric shock
Do not connect the AC field plug under load.
• Make sure that the two-pole circuit breaker of the Sunny Multigate is switched off and
cannot be reconnected.
• Make sure that the PV modules are covered.
6 Electrical Connection SMA Solar Technology AG
Installation Manual SMA-SB240-IA-en-12 36