Safety During Electrical Connection; Inserting The Cables Into The Switch Cabinet; Dc-Cmb-U15-16 - SMA STRING-COMBINER DC-CMB-U15-16 Manuel D'installation

SMA Solar Technology AG

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-U15-16

Figure 8: Bottom view of Combiner Box with cable glands (example)
Position Description
A Cable entry for connecting the strings (positive terminal)
Output DC cable gland
B
Grounding cable gland
C
D Protective vent
E Cable entry for connecting the strings (negative terminal)
Installation Manual
A D B
6 Electrical Connection
C E
DC-CMB-IA-U15-xx-en 19