Kaco Powador 2002 Operating Manual page 25

Installing the inverter
Authorised electrician
NOTE
Connected PV modules must be dimensioned for the DC system voltage in accordance with IEC 61730
Class A, but at least for the value of the AC grid voltage.
DANGER
Risk of fatal injury due to contact voltages.
› During installation: Electrically disconnect the DC positive and DC negative from the protective
earth (PE).
Removing the plug connection without previously disconnecting the inverter from the PV generator
may lead to injuries and damage the inverter.
› Disconnect the inverter from the PV generator using the integrated DC disconnect.
› Remove the plug connector.
Figure 17: Connections for DC positive and DC negative
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,
– protective earth (PE) and the negative cable of the PV generator are identifi ed.
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,
– protective earth (PE) and the negative cable of the PV generator are identifi ed.
In addition, ensure that the PV generator has a total insulation resistance of more than 2.0 megohms, since the
inverter will not feed in if the insulation resistance is too low.
4. Rectify any faults before connecting the DC generator.
Operating Instructions for Powador 2002-6002_EN Page 25