SMA SI 3.0-11 Installation - Manual (Page 30)

7 Electrical Connection SMA Solar Technology AG
30 SI30M-44M-60H-80H-IA-en-30 Installation Manual
7.4.3.4 Connecting the Measuring Cables to the Automatic Transfer Switch
The Sunny Island measures the voltages of the respective line conductors via one measuring cable. In addition,
the master also verifies whether the tie switch is activated or deactivated (for circuitry overview, see the Quick
Reference Guide "SMA Flexible Storage System with Battery Backup Function").
Procedure:
1. On the Sunny Island, connect the measuring cable X4 Ln * and
X4 N for voltage monitoring to the ExtVtg terminal. Ensure that
the cable is correctly connected (see Section 7.5.7 "Connecting
ExtVtg", page 57).
2. At the master, connect the tie switch monitoring. Ensure that the cable from X5 3 and X5 4 is correctly connected
(see Section 7.5.6 "Connecting BatVtgOut, DigIn, BatTMP, and BatCur", page 56).
• Connect BatVtgOut − with DigIn − within the master.
• Connect the insulated conductor from X5 3 to DigIn+.
• Connect the insulated conductor from X5 4 to BatVtgOut+.
2. :$51,1*
Danger to life from electric shock due to incorrect insulation
• Connect the control cable of X4 1 and X4 2 to the Relay1 C
and Relay1 NC terminals. Ensure that the cable is correctly
connected (see Section 7.5.5 "Connecting Relay 1 and
Relay 2", page 55).
3. :$51,1*
Danger to life from electric shock due to incorrect insulation
• Connect the control cable of X5 1 and X5 2 to the Relay2 C
and Relay2 NO terminals. Ensure that the cable is correctly
connected (see Section 7.5.5 "Connecting Relay 1 and
Relay 2", page 55).
* Ln = L1 to L3