SMA SC 100LV-560HE - Manual (Page 30)

Electrical Connection SMA Solar Technology AG
30 SC125_560HE-IEN083220 Installation Guide
5 Electrical Connection
After both switch cabinets have been installed next to each other and have been mechanically
connected, the individual cabinets must be electrically connected with each other. Afterwards, the
external electrical connections are established.
5.1 Internal Connections
For the internal electric connection of the two cabinets, the following internal connections have to be
made:
• Power cabling between sine filter and transformer (not for the HE version)
• HE version: Power cabling between sine filter and power unit
• Sunny Central 250HE: Power cabling between sine filter and EMV filter
• Grounding connection between AC cabinet and DC / inverter cabinet
• Control line at the transfer terminal strip
• Communication between Sunny Central Control and power unit in DC / inverter cabinet
• Communication between Sunny Central and insulation monitoring
• Mounting of temperature sensor
• Power cabling Team concept (optional)
• Team communication RS485 (optional)
• Team control (optional)
• EVR resistor (optional)
5.1.1 Power cabling between sine filter and transformer
At the sine filter choke in the DC / inverter cabinet, three power cables (U1, V1, W1) are connected;
in the AC cabinet, they have to be connected to the appropriately marked terminal clamps
(U1, V1, W1) of the transformer. The cables have already been equipped with cable lugs and cut in
a way that the connection to the contact tip is clear. The sine filter is located in the Sunny Centrals of
the types 100LV, 125LV, 150, 200 and 250 behind the fuses of the DC / inverter cabinet.
Realization of the electrical connection
For establishing the electrical connections and terminals, it is obligatory to follow the circuit
diagram included in the delivery.
All internal connections have to be made in order to prepare the inverter for the external
AC and DC connections.
Mounting the internal connections
The internal connections are to a great extent pre-mounted and must finally be inserted or
screwed into the cabinets when putting together.