SMA SC 200 Installation - Manual (Page 51)

SMA Solar Technology AG External Connections
Installation Guide SC20_25_35-IEN094521 51
6 External Connections
The following steps, explained in the next sections, are required for the external electrical connection.
• Connect the AC grid
• Connect the PE connection to the equipotential bonding (Sunny Central 250HE only)
• Connect the internal AC power supply
• Connect the DC cable
• Connect the team cable (optional)
• Connect the analog inputs
• Connect the communication
• Connect the emergency shut-off
• Connect the overvoltage protection
WARNING!
Risk of death due electric shock when live parts of the low-voltage grid are
touched!
• Only work on the Sunny Central when it is switched off and voltage-free.
• All applicable safety requirements regarding the low-voltage grid must be observed.
WARNING!
Danger of fire in the event of direct contact of copper and aluminum.
If copper and aluminum come into contact, the contact surface between the cable lug and
the connection guide can oxidize. This causes the contact point to heat up. In turn, this can
cause a fire.
• Use a cupal washer or a copper-aluminum cable lug.
Connection Sizing
The installation conditions (separate document) contain the maximum connection cross
sections of the lines and cable lugs. You can download the installation conditions in the
Download area of www.SMA.de/en.
Electrical connections
For all electrical connections, it is imperative that you use the supplied circuit diagram.