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Installation Manual
SMA Solar Technology AG
DC-CMB-IA-U10-xx-en
6 Electrical Connection
6.2 Safety during Electrical Connection
Danger to life due to electric shock
High voltages are present in the live components of the Combiner Box. Therefore, work on the
Combiner Box is only allowed if the power is disconnected and the guidelines that apply at the installation
location are strictly followed.
•
Disconnect from voltage sources:
– Switch off the DC load-break switch in the Combiner Box.
– With power off, remove the DC fuses in the central inverter or main DC distribution box. Use an LV/HRC fuse
handle.
– Only open the fuse holders when the Combiner Box is switched off.
•
Ensure that the device cannot be reconnected.
•
Ensure that no voltage is present.
•
Ground and short-circuit.
•
Cover or isolate any adjacent live components. Protective covers must always be mounted.
6.3 Inserting the Cables into the Switch Cabinet
6.3.1 DC-CMB-U10-16
Figure 8: Bottom view of Combiner Box with cable glands (example)
Position
Description
A
Cable entry for connecting the strings (positive terminal)
B
Output DC cable gland
C
Grounding cable gland
D
Protective vent
E
Cable entry for connecting the strings (negative terminal)
A
B
C
D E
