3
Device description
3.1
Function
The device converts the DC voltage generated by the PV modules into AC voltage and feeds it into the grid. The starting
procedure begins when there is sufficient sunlight and a specific minimum voltage is present in the device. The feed-in
process begins once the PV generator has passed the insulation test and the grid parameters are within the requirements
imposed by the grid operator for a specific monitoring time. If, as it gets dark, the voltage drops below the minimum volt-
age value, feed-in mode ends and the device switches off.
3.2
Structure of the device
1
2
5
5
6
8
7
3
4
Fig. 3:
Device diagram - S version
1
2
6
8
7
3
4
9
5
Fig. 4:
Device diagram - XL version
Key
1
Housing
6
Interface / cable feed-through
2
Cover
7
Communication - button / USB port
3
Status indicator
8
DC connection / cable feed-through
4
Upper cover
9
DC isolator switch (not present in S version)
5
AC connection / cable feed-through
3.2.1
Mechanical components
DC isolator switch (not present in S version)
The DC isolator switch is located on the housing door. of the device. The DC isolator switch is used to disconnect the de-
vice from the PV generator in order to carry out service.
Disconnecting the device from the PV generator
F
Switch the DC isolator switches from 1 (ON) to 0 (OFF).
Connecting the device to the PV generator
F
Switch the DC isolator switches from 0 (OFF) to 1 (ON).
ON
OFF
Fig. 5:
DC isolator switch
3.2.2
Electrical functions
A potential-free relay contact is integrated into the device. Use this contact for one of the following functions:
Fault signal relay
The potential-free relay contact closes as soon as there is a fault during operation. You use this function, for example, to
signal a fault visually or acoustically.
KACO blueplanet 87.0 TL3 KACO blueplanet 92.0 TL3 KACO blueplanet 110 TL3 KACO blueplanet 125 TL3
KACO blueplanet 137 TL3 KACO blueplanet 150 TL3
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