SMA SUNNY ISLAND 4.4M Operating Manual page 58

6 Electrical Connection
Danger to life from electric shock due to incorrect connection of the neutral conductor ins
single systems and single-cluster systems
In single systems and single-cluster systems, the neutral conductor of the external energy source is firmly connected
to the neutral conductor of the Sunny Island inverter on connection AC2 Gen/Grid N. Upon disconnection of the
external energy source, the Sunny Island only disconnects the line conductor on connection AC2 Gen/Grid N. The
Sunny Island disconnects all poles from the external energy source on connection AC2 Gen/Grid N
neutral conductor is incorrectly connected on connection AC2, the protective functions in the system can fail. This
can result in death or serious injury.
• Always connect the neutral conductor to the connection AC2 Gen/Grid N
consumption.
• Always connect the neutral conductor to the connection AC2 Gen/Grid N
• Always connect the neutral conductor of the generator to the connection AC2 Gen/Grid N in off-grid
systems.
Danger of crushing when locking levers snap shut
The locking levers close by snapping down fast and hard.
• Press the locking levers of the terminal block for the AC cable down with your thumb only.
• Do not grip the entire terminal block for the AC cable.
• Do not place your fingers under the locking levers.
Procedure:
1. Move the levers of the terminals upward at AC1 or AC2.
2. When connecting the cable to connection AC1, attach the M25
cable gland to the AC1 enclosure opening using the counter nut
(torque: 7 Nm).
3. When connecting the cable to connection AC2, attach the M25
cable gland to the AC2 enclosure opening using the counter nut
(torque: 7 Nm).
4. Remove the cable jacket and strip off 13 mm of the the insulation of all conductors.
5. Lead the cable through the cable gland into the Sunny Island.
6. Connect the insulated conductors to AC1 Loads/SunnyBoys or AC2 Gen/Grid. Insert the neutral conductor as
far as it will go into terminal N or NTT and push the lever down.
58 SI44M-80H-13-BE-en-15
WARNING
CAUTION
SMA Solar Technology AG
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in systems for increased self-
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in battery backup systems.
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Operating manual