KACO Powador-gridsave - Manual (Page 22)

Installing the device
Page 22 Operating instructions Powador-gridsave_EN
Authorised electrician
7.2.1 Connecting to the power grid
Because the device is installed between the main junction box/meter and the building's electrical system, the maxi-
mum grid current to the service line must not exceed the rated operating current of the battery system.
The cable cross-section must be selected in accordance with applicable standards to suit the connected load, instal-
lation type etc. Moreover, the terminal area and size of the cable fitting must be noted.
NOTE
The fuse rating for the cable should be max. 63A (automatic circuit breaker or safety fuse) even if the
cross-section of the installed cable would permit a higher fuse rating. Always follow the applicable
regulations regarding the cable cross-section and installation type.
The device supports standard grid configurations such as TN-C, TN-S and TT.
TN-S:
If a TN-S grid is present directly at the power input and output of the device, L1-L3, N and PE must
each be connected. The home power grid should have 4-pin isolation.
TN-C:
4-pin grid isolation is factory preset and disconnects L1, L2, L3 and N. In a TN-C grid the N conduc-
tor must not be disconnected. If a TN-S grid is present directly at the power input and output of the
device, a cable bridge (included in delivery) must be installed between the N terminal on X1 and the
N terminal on X2. N and PE must additionally be connected together. To do this, simply insert the
enclosed terminal link into the N and PE terminals.
TT:
In the case of a TT grid, L1-L3, N and PE must each be connected. The home power grid should have
4-pin isolation.
NOTE
Please check with the operator of the mains grid whether there are special regulations for grid
connection. Grid isolation is factory preset to 4-pin, is fail-safe and provided with grid and system
protection as per VDE-AR-N 4105.
Making the grid connection
↻ Use cables with 5 wires (L1: brown, L2: black, L3: grey, N: blue, PE: green/yellow) and the correct
cross-section.
1. Loosen cable fitting for AC connection.
2. Remove the outer cladding of the AC cables.
3. Insert the AC cables through the cable fitting into the connection area.
4. Strip the insulation from the AC cables.
5. Remove connection terminals.
6. Connect the cables in line with the terminal labels. (Figure 13 on page 21)
7. Close the connection terminals.
8. Check that all connected cables are securely fitted.
9. Tighten the cable fitting.
10. To meet the requirements of protection rating IP21, close the unused cable fittings with blind caps.
» The battery system is connected to the power grid.
NOTE
An AC-side disconnection unit must be provided during the final installation stage. This disconnec-
tion unit must be installed so that it can be accessed at any time without obstruction.
If a residual current circuit breaker is necessary due to the installation specification, a type A residual
current circuit breaker must be used.