SMA SC 200 Installation - Manual (Page 30)

Internal Electrical Connections SMA Solar Technology AG
30 SC20_25_35-IEN094521 Installation Guide
5 Internal Electrical Connections
The following steps must be taken to make the internal electrical connection:
• Connect the power cables
• Connect the PE connection
• Connect the control cables to the power unit
• Connect the Sunny Central Control to the power unit
• Connect the internal control cables
• Connect the insulation monitoring (optional)
• Fit the internal temperature sensor
• Connect the team cable (optional)
• Connect the EVR resistor (optional)
5.1 Preparatory Work for the Sunny Central 200 / 250 with the
"Protection against Chemically Active Substances" Option
The Sunny Central 200 / 250 units with the "Protection against chemically active substances" option
have an encapsulated design. The two switch cabinet units are separated by a side wall. There are
two sliding plates with a clamping felt in the side wall. The data and control lines are routed through
the sliding plates which connect the DC cabinet to the AC cabinet. The procedure is described below.
The following figures show the Sunny Central 250 with the "Protection against chemically active
substances" option as an example.
Circuit diagram and equipment identifier
The exact position of the individual connection points can be determined with the help of
the equipment identifier and the provided circuit diagram. In the front part of the circuit
diagram, you will find an overview with data on the cable number and the respective
connection point.
Electrical connections
For all electrical connections it is imperative that you comply with the supplied circuit
diagram.