SMA SI-TB-BOX-10 - Manual (Page 35)

SMA America, LLC 6 Electrical Connection
Installation Manual SI_TDBOX-IA-eng-IUS122211 35
6.2.4 System Overview
Figure 16: Smartformer system overview
Position Description Explanation
"T1" Autotransformer See Section 4.2 "Autotransformer", page 17
"Q1" Overload protection See Section 4.6 "Overload Protection", page 20
"Q2" Load-shedding contactor See Section 4.4 "Load-Shedding Contactor", page 18
"Q3" Bypass switch See Section 4.3 "Bypass Switch", page 18
"F2" 2-pole miniature
circuit-breaker When the bypass switch is set to "I ON", "F2" and "F3"
protect the loads.
"F3"
"F4"
2-pole miniature
circuit-breaker "F4" and "F5" protect the PV inverters.
"F5"
"F6"
2-pole miniature
circuit-breaker When the bypass switch is set to "II ON", "F6" protects the
loads and the generator.
When the bypass switch is set to "I ON", "F6" protects the
AC 2 output of the Sunny Island.
"F7" When the bypass switch is set to "II ON", "F7" protects the
loads and the generator.
ATS Automatic Transfer
Switch Automatic transfer switch: not included in scope of delivery
L1
L2
N
L
N
L1
L2
N
L/AC2 N L/AC1 L1 L2 N
L/L1
N
L2
F7
F6
F2 F3
F4 F5
T1
Q1
Q2
Q3
AC
sub-distribution Loads
Sunny Island PV inverter
Generator
Power
distribution grid
SMARTFORMER