SMA SUNNY ISLAND 3.0M Installation Manual page 64

7 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,
allocation 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 6 / 12 / 36
If installed, the control and measuring
cables of the Multicluster Box 12
(MC-Box-12.3-20)
If installed, the measuring cable of the
battery current sensor
Control cable of the load shedding, if
installed
64 SI30M-44M-60H-80H-IA-en-32
Test criterion
The cables are sufficiently protected by circuit breakers.
Trip-capable circuit breakers are installed and additional type A
residual-current devices have been installed.
Maximum trip-capable circuit breakers:
• SI3.0M-11: Trip characteristic B6
• SI4.4M-11: Trip characteristic B6
• SI6.0H-11: Trip characteristic B16 or C6
• SI8.0H-11: Trip characteristic 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
rotating 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
Multicluster Box manual).
The control and measuring cables are connected correctly (see
Multicluster Box manual and quick reference guide "Multicluster
Systems with Stand-Alone Grid or Increased Self-Consumption and
Battery-Backup Function" of the Sunny Island inverter).
The measuring cable of the battery current sensor is connected to
the terminal BatCur with the correct polarity (see Section 7.4.10
"Connecting the Battery Current Sensor in the Off-Grid System",
page 43).
The multifunction relay and the load-shedding contactors are
correctly wired to each other (see Section 7.4.13 "Connecting
Load-Shedding Contactors", page 47).
SMA Solar Technology AG
OK
OK
OK
Installation manual
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