SMA SSM-U-1615 User Manual
Page 43
Danger to life due to electric arc
An electric arc may occur when plugging or removing the DC connectors or the inline fuse
connectors under load and in case of a reverse-poled connection of the DC connectors. Electric
arcs can result in death or serious injury.
• Ensure the correct polarity of the strings before connection.
• Plug or remove DC connectors and inline fuse connectors only under load-free conditions.
• Disconnect the DC sub-distribution (see the DC sub-distribution manual).
• Wear suitable personal protective equipment.
Damage to the DC connectors due the use of contact cleaner of other cleaning agents
Some contact cleaners or other cleaning agents may contain substances that decompose the
plastic of the DC connectors.
• Do not use contact cleaners or other cleaning agents for cleaning the DC connectors.
Damage to the DC subdistribution due to moisture ingress
The DC subdistribution is only properly sealed when all unused DC inputs are closed with suitable
protective caps on the DC connectors.
• For any unused DC inputs of the DC subdistribution, fit appropriate protective caps of the
SUNCLIX plug-in system onto the DC connectors of the string cables of the DC
subdistribution.
The protective caps are available from Phoenix Contact.
Cable requirements:
☐ Cable type: PV 1-F
☐ Conductor cross-section for 6 mm
2
DC connector: 2.5 mm
2
to 6.0 mm
2
☐ Cable diameter for 6 mm
2
DC connector: 5.0 mm to 8.0 mm
☐ Conductor cross-section for 16 mm
2
DC connector: 6.0 mm
2
to 16.0 mm
2
☐ Cable diameter for 16 mm
2
DC connector: 5.5 mm to 10.0 mm
Additionally required material (not included in the scope of delivery):
☐ For any unused DC inputs:
SUNCLIX protective caps for DC connectors
Procedure:
1. Ensure that the DC subdistribution is switched off and secured against reconnection (see
Section 8 "Disconnecting and Reconnecting", page 46).
2.
).
6 Installation
SMA Solar Technology AG
Operating Manual
43
SSMUXX15-BE-en-10