Kaco Powador 7700, Operating Instructions Manual

Page: 19 / 52

Installing the inverter
Page 19 Operating Instructions for Powador 7700-9600_EN
EN
Authorised electrician
NOTE
In order to avoid asymmetries in the grid, systems with multiple inverters should be designed so that
the inverters feed into the grid in differing phases.
› The dynamic grid support (FRT) only functions with a three-phase grid connection.
› Observe the following grid-type-specific connection requirements and the schematic views in sec-
tion 3.2.2 on page 8.
Country and
grid-type
Grid monitoring Required
monitoring
max. asymmetry between phases
L1,L2,L3
DE-MSP Three phase phase unbalanced load 4.6 kVA
DE-NSP Three-phase or
single phase
phase unbalanced load 4.6 kVA
IT-CEI021 single-phase phase unbalanced load 6 kVA
other countries
Three-phase or
single phase
If you have any queries, please contact your grid operator.
Table 4: Grid-type-specific connection conditions
NOTE
For systems which feed into the low-voltage network, the three-phase connection is preferable.
ACTIVITY
Cables on the AC screw terminal must be re-tightened at regular intervals using the necessary
tightening torque (see chapter 7.2 on page 17).
Making the grid connection
↻
Use wires with 3 conductors (L1, N, PE) or 5 conductors (L1, L2, L3, N, PE).
(3-phase grid monitoring)
1. Unscrew the cable fitting.
2. Remove the outer cladding of the AC cables.
3. Insert the AC leads through the cable fitting into the connection area.
4. Strip the insulation from the AC cables.
5. Open the locks for the PCB terminals.
6. Connect wires in accordance with the labels on the PCB terminals (Figure
14).
7. Close the locks for the PCB terminals.
8. Check that all connected cables are securely fitted.
9. Tighten the cable fitting.
PE
N
BU
L2
BK
L1
BN GNYE
L3
GY
» The inverter is now connected to the power grid. Figure 14: AC connection terminals
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.
7.2.2 Connecting the PV generator
Connect the PV generator on the right of the connection area (see Figure 13 on page 18). Use the provided cable
fittings.