SMA SC 100LV-560HE - Manual (Page 47)

SMA Solar Technology AG Electrical Connection
Installation Guide SC125_560HE-IEN083220 47
5.2 External Connections
For external electrical connection of the Sunny Centrals, the following connections have to be made:
• AC grid connection
• Connection PE rail with HE version
• AC control voltage
• DC connection
• Power cabling Team concept (optional)
• External messages and signals
• Sensors and digital outputs
• Communications connection
• Emergency-stop cabling
• Lightning / Surge protection
5.2.1 AC grid-connection standard devices
ATTENTION!
Yield loss due to poor electrical conductivity!
The connection points for the external terminals are either copper or aluminum. If copper
and aluminum are connected with each other at the connection point, the electrical
conductivity decreases.
• Check which material is used at the connection point.
• When combining both materials, use either a copper-aluminum washer or copper-
aluminum cable lugs.
Making the external connections
Make the external connections with the help of the provided circuit diagram.
Dimensioning the connections
How to carry out the AC grid-connection point as well as the maximum inverter-specific
connection cross-section and cable lugs are included in the installation requirements of the
relevant Sunny Central.
WARNING!
Risk of death due to burns and electric shock when live parts of the low-voltage
grid are touched!
• Do not touch the live components of the Sunny Central or low-voltage grid.
• All safety precaution measures regarding the low voltage grid must be observed.
• Only work on this device when it is switched off and under voltage-free conditions.