SMA SI 3.0-11 Installation - Manual (Page 58)

7 Electrical Connection SMA Solar Technology AG
58 SI30M-44M-60H-80H-IA-en-30 Installation Manual
7.6 Checking the Wiring
Ensure that you carry out all tests relevant to the system and rectify all detected problems. Tip: Tests can be documented
directly in the tables. Cross out all tests not applicable.
Requirement:
☐ All Sunny Island inverters must be voltage-free (see the Sunny Island inverter operating manual).
Procedure:
Checking the grounding
Checking the additional grounding
If the battery is grounded, you must check the additional grounding on the Sunny Island.
Test point Test criterion OK
Enclosure opening, grounding conductor/
ExtVtg
Enclosure opening is sealed with a filler plug or M20 cable gland. □
The cable diameter of the cable must be 7 mm to 14 mm for an
M20 cable gland.
□
Conductor cross-section of the grounding
conductor at the AC1 and AC2
connections
If one grounding conductor is connected, the conductor
cross-section must be at least 10 mm². If two grounding conductors
are connected, the cross-section of each conductor must be at least
4 mm².
□
Grounding conductor connection to
ground
The grounding conductor must be grounded, e.g. by connection to
a grounding busbar or a foundation ground electrode.
□
With a TN system, neutral conductor and
grounding conductor connection
Ensure by measuring that there is a conductive connection between
the neutral conductor and the grounding conductor.
□
Grounding of the battery Ensure that the battery is not grounded unintentionally.
If the battery has been grounded intentionally, ensure that the
conductor cross-section is sufficient (see Section 7.3 "Connecting
the Grounding Conductor in Systems With Grounded Battery",
page 25).
□
Test point Test criterion OK
Conductor cross-section for the additional
grounding
The conductor cross-section must correspond to the grounding of
the battery.
□
Connection of additional grounding Hexagon socket screw is screwed tight (torque: 4 Nm to 5.7 Nm). □
Grounding conductor connection to
ground
The grounding conductors must be grounded, e.g. by connection to
a grounding busbar or foundation ground electrode.
□