KACO Powador-gridsave - Manual (Page 24)

Installing the device
Page 24 Operating instructions Powador-gridsave_EN
Authorised electrician
7.2.2 Connecting the PV generator
Connect the PV generator on the left in the connection area (Figure 13 on page 21). Use the provided M16 cable
fittings. A maximum of two strings can be connected. For this reason, a DC string fuse can be dispensed with.
DANGER
Risk of fatal injury due to contact voltages.
Removing the cables from the terminals without first disconnecting the PV generator from the
device can cause serious damage to health or damage to the system.
› During installation: Electrically disconnect the DC positive and DC negative from the protective
earth (PE).
› Completely de-energise the system (AC home power grid, AC circuit breaker, residual current circuit
breaker, DC isolator switch)
› Disconnect the battery system from the PV generator using the integrated DC isolator switch.
› Remove DC plug connectors.
NOTE
In accordance with IEC 61730 Class A, connected PV modules must be dimensioned
for the DC system voltage provided, and at least for the value of the AC grid voltage.
7.2.2.1 Before connecting
Ensure that there is no ground fault
1. Determine the DC voltage between the
– protective earth (PE) and the positive cable of the PV generator, and between the
– protective earth (PE) and the negative cable of the PV generator.
If stable voltages can be measured, there is a ground fault in the DC generator or its wiring. The ratio between the
measured voltages gives an indication as to the location of this fault.
2. Rectify any faults before taking further measurements.
3. Determine the electrical resistance between the
– protective earth (PE) and the positive cable of the PV generator, and between the
– protective earth (PE) and the negative cable of the PV generator.
In addition, ensure that the PV generator has a total insulation resistance of more than 2.0 MOhm, since the
inverter will not feed in if the insulation resistance is too low.
4. Rectify any faults before connecting the DC generator.
7.2.2.2 Connecting the PV generator
DANGER
Risk of fatal injury due to electric shock
Severe injury or death will result if the live connections are touched. When there is solar radiation, DC
voltage will be present at the open ends of the DC cables.
› Do not touch the exposed ends of the cables.
› Avoid short circuits.