SMA SI 3.0-11 Quick Reference Guide V.3.0 - Manual (Page 26)

4 Battery Backup Systems With All-Pole Disconnection SMA Solar Technology AG
26 Ersatzstrom-IS-en-30 Installation - Quick Reference Guide
4.2.3 Connecting the Master
Figure 8: Connecting the master
Position Designation Description/information
A Cable for the control voltage Sunny Island: connection AC1 Loads/SunnyBoys terminals L and N
Automatic transfer switch: connection X5 terminals L and N
Conductor cross-section: 2.5 mm² to 16 mm²
B AC power cable Sunny Island: connection AC2 Gen/Grid terminals L, N
TT
, and PE
Automatic transfer switch: connection X3 terminals L1, N, and PE
Conductor cross-section: 10 mm² to 16 mm²
C Measuring cable for voltage
measurement
Sunny Island: connection ExtVtg terminals L and N
Automatic transfer switch: connection X4 terminals L1 and N
Conductor cross-section: 1.5 mm² to 2.5 mm²
D DC+ cable Battery connection
Conductor cross-section: 50 mm² to 95 mm²
Cable diameter: 14 mm to 25 mm
E DC − cable
F Measuring cable of the
battery temperature sensor
Sunny Island: BatTmp connection
You only have to connect a battery temperature sensor if lead-acid
batteries are used.
Mount the battery temperature sensor in the middle of the battery
connection, in the upper third of the battery cell.