3
Description of the device
3.1
Mode of operation
The device converts the DC voltage generated by the PV-modules into AC voltage and feeds this into the power 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 re-
quirements imposed by the grid operator for a specific monitoring time. If, as it gets dark, the voltage drops below the
minimum voltage value, feed-in mode ends and the device switches off.
3.2
Device diagram
1
3
4
5, 6
2
7, 8
Fig. 3:
Device diagram - M, XL park version
Key
1
Housing with pedestal
5
DC connection / cable feed-through
2
Housing door
6
Interfaces / cable feed-through
3
Status indicator with display and operator panel
7
Communication - USB port / cable feed-through
4
Upper cover
8
AC connection / cable feed-through
3.2.1
Mechancial Components
There are 3 DC isolator switches inside the device. The DC isolator switch is used to disconnect the inverter from the PV
generator in order to carry out service activities.
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).
Fig. 4:
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:
Potential-free 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.
Priwatt
The energy that is provided by the PV system can be put to use directly by the appliances that are connected in your
home.
Powador 30.0-72.0 TL3
Page 11
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