User Manual
5 Electrical Connection
21
Item
Description
A
Screw (M4
×
12 mm)
B
Spring washer
C
Washer
D
Cable socket
E
Yellow-green cable
Fig. 5-3
Second PE Connection
* The cross-section of the PE cable should be at least 10 mm
2
if copper or 16 mm
2
if
aluminum. The connection parts are not included in the delivery scope.
5.4
Grid Connection
The inverter is connected to the grid via 3 wires (L, N and PE).
Inverter is equipped with the water-proof direct plug-in connector which matches
the AC terminal at the bottom of the inverter.
5.4.1 AC Side Requirements
AC Circuit Breaker
An independent two-pole AC circuit breaker for the inverter must be installed at the
output side for safe disconnection. The recommended specifications are as follows:
Inverter Type
Specification
SG2KTL-S/SG3KTL-S/SG3KTL-D
25A
SG5KTL-D
32A
y
It is not allowed for several inverters to use the same AC circuit breaker.
y
It is not allowed to connect loads between the inverter and the AC circuit
breaker.
Residual Current Device
With an integrated universal current-sensitive residual current monitoring unit
inside, the inverter will disconnect immediately from the mains power as soon as a
fault current with a value exceeding the limit has been detected.
However if an external residual current device (RCD) is mandatory, the switch must
be triggered at a failure current of 300 mA or higher.
