SMA SSM8-21-BS - Manual (Page 23)

SMA Solar Technology AG 6 Electrical Connection
Installation Manual SSMxx-21-IA-BS-JP-en-20 23
6 Electrical Connection
6.1 Safety during Electrical Connection
6.2 Inserting the Cables into the Switch Cabinet
Figure 9: Bottom view of Sunny String-Monitor with cable glands (example)
Leading Cables through the Cable Feed-Through Plate
SMA Solar Technology AG recommends the use of supplementary strain relief for the string cables.
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Danger to life due to electric shock
High voltages are present in the live components of the Sunny String-Monitor. Therefore work on the
Sunny String-Monitor is only allowed if the power is disconnected and the guidelines that apply at the mounting location
are strictly followed.
• Disconnect from voltage sources:
– Switch off the DC load-break switch in the Sunny String-Monitor.
– Remove the DC fuses in the central inverter or main DC distribution box when the power is switched off. Use an
LV/HRC fuse extractor.
– Only open the fuse holders in the Sunny String-Monitor when the power is switched off.
• Ensure that the device cannot be reconnected.
• Ensure that no voltage is present.
• Ground and short-circuit the device.
• Cover or isolate any adjacent live components. Protective covers must always be mounted.
Position Designation Explanation
A Condensate drain ‒
B Cable feed-through plate For connecting the string cables
C Cable gland with sealing ring cut-outs For connecting the data cables
D Sealing plug Reserve
E Cable gland with sealing ring cut-outs For connecting the DC main cables
F Cable gland with sealing ring cut-outs For connecting the grounding cable
G Sealing plug Reserve