SMA SUNNY ISLAND 4.4M Operating Manual page 70

6 Electrical Connection
Test point
AC power cable at connection AC1
With a three-phase system, allocation
of the Sunny Island inverters
Checking the Generator Connection
Test point
The connection cables
With a three-phase off-grid system, al-
location of the line conductors
Grounding
Checking the Control and Measuring Cables
Test point
Battery temperature sensor if installed
If installed, the control and measuring
cables of the Multicluster-Box
If installed, the measuring cable of the
battery current sensor
Control cable of the load shedding, if
installed
Cables at BatTemp and BatCur
70 SI44M-80H-12-BE-en-10
Test criterion
The cables are sufficiently protected by circuit breakers.
Trip-capable circuit breakers are installed and additional type A resid-
ual-current devices have been installed.
Maximum trip-capable circuit breakers:
• SI4.4M-12: Tripping characteristics B6
• SI6.0H-12: Tripping characteristics B16 or C6
• SI8.0H-12: Tripping characteristics B16 or C6
The allocation of the Sunny Island inverters to the line conductors of
the stand-alone grid or the Multicluster-Box results in a right-hand rotat-
ing magnetic field. The master must be assigned to L1, slave 1 must be
assigned to L2, slave 2 must be assigned to L3.
Test criterion
The conductor cross-section is sufficient for the maximum generator
current.
The cables are sufficiently protected by circuit breakers.
The allocation of the Sunny Island inverters to the line conductors of
the generator results in a right-hand rotating magnetic field. The master
must be assigned to L1, slave 1 must be assigned to L2, slave 2 must
be assigned to L3.
The exposed conductive part of the generator is grounded.
Test criterion
The battery temperature sensor is connected to the terminal BatTmp.
The battery temperature sensor is secured in the middle of the battery-
storage system, in the upper third of the battery cell.
The control and measuring cables are correctly connected (see Multi-
cluster-Box manual).
The measuring cable of the battery current sensor is connected to the
terminal BatCur with the correct polarity (see Section 6.5.9 "Connect-
ing the Battery Current Sensor in the Off-Grid System", page 48).
The multifunction relay and the load-shedding contactors are correctly
wired to each other (see Section 6.5.12 "Connecting Load-Shedding
Contactors", page 52).
The insulated conductors must be threaded through a ferrite.
The cable length for BatCur must be less than 3 m.
The cable length for BatTmp must be less than 30 m.
SMA Solar Technology AG
Operating Manual
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