Electrical Connection; Safety During Electrical Connection - SMA RAPID SHUTDOWN SYSTEM Instrucciones De Instalación

6 Electrical Connection
6 Electrical Connection
6.1

Safety during Electrical Connection

Damage to the Rapid Shutdown Box from moisture and dust ingress.
Dust and moisture ingress can damage the Rapid Shutdown Box and impair its functionality.
• Do not open the Rapid Shutdown Box during rain, snow or high levels of humidity (> 95%).
• Only use listed raintight or liquidtight conduit fittings to attach the conduits to the enclosure.
SMA recommends using conduit fittings with flat, pliable, thick rubber sealing gaskets. The
sealings should be roughly 2.54 mm (0.1 in /
against using thinner, harder sealings (typically yellow or green colored). These sealing
types may not make reliable seals for this application. These sealings are approximately
1.9 mm (0.075 in /
using conduit fittings with round cross section and o-ring type sealings as these types of
seals are not reliable for this application.
• Seal all unused openings tightly.
Electrical installations
All electrical installations must be carried out in accordance with the local standards and the
National Electrical Code
• The electrical connection of the Rapid Shutdown System may only be made by qualified
persons with appropriate skills.
• Ensure that no cables used for electrical connection are damaged.
The Rapid Shutdown function is only available if strings are correctly connected at
the inverter.
The Rapid Shutdown function is not available if the strings from the Rapid Shutdown Box are
connected in parallel with any string from the PV array not connected through a Rapid
Shutdown Box.
• Always connect the strings from the Rapid Shutdown Box to an inverter input with strings
from the same or other Rapid Shutdown Boxes.
• Do not connect the strings from a Rapid Shutdown Box in parallel with strings that do
not connect through a Rapid Shutdown Box.
18 RSS-US-IA-xx-13
5
/ in) thick or less. SMA recommends against and does not accept
64
®
ANSI/NFPA 70 or the Canadian Electrical Code
SMA Solar Technology America LLC
7
/ in) in thickness. SMA recommends
64
®
CSA C22.1.
Installation Manual