SMA SMB - Manual (Page 8)

2 Safety SMA Solar Technology AG
8 SMB-IA-en-10 Installation Manual
2.2 Qualification of Skilled Persons
The work described in this document must be performed by skilled persons only. Skilled persons must
have the following qualifications:
• Knowledge of how the device works and is operated
• Training in how to deal with the dangers and risks associated with installing and using electrical
devices
• Training in the installation and commissioning of electrical devices
• Knowledge of all applicable standards and directives
• Knowledge of and compliance with this document and all the safety precautions
2.3 Safety Precautions
Electric Shock
High voltages capable of causing electric shocks are present in the Sunny Main Box and
Sunny Main Box Cabinet. Therefore, work on the Sunny Main Box and Sunny Main Box Cabinet is
permitted only with the power disconnected and in compliance with the guidelines applicable at the
installation location.
• Disconnecting the device:
– If there is a DC power switch in the upstream DC sub-distributions, switch it off.
– Only remove the DC fuses on the central inverter once the inverter is disconnected and using
the LV/HRC fuse handle.
– If the central inverter is equipped with the "Optiprotect" option, switch the miniature circuit-
breakers in the central inverter off.
– Only pull out the DC fuse in the Sunny Main Box or Sunny Main Box Cabinet once the
inverter is disconnected and using the LV/HRC fuse handle.
• Ensure that the device cannot be reconnected.
• Check that no voltage is present.
• Earth and short-circuit.
• Cover or shield any adjacent live components. Protective covers must always be in place.
In the event of an earth fault, remember that plant components which are presumed earthed may still
be live.
• Ensure that no voltage is present before touching any plant components.