KACO Powador 3200 - 6600 - Manual (Page 22)

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Installing the inverter
Page 22 Operating Instructions for Powador 3200-6600_EN
Authorised electrician
7.2.2 Connecting the PV generator
Connect the PV generator on the right of the connection area (see Bild 13 auf Seite 20). Use the provided cable
fittings.
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 first 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 isolator switch.
› Remove the plug connector.
NOTE
Only PV modules that have IEC 61730 Class A rating can be connected to inverters that are not
electrically isolated. The maximum nominal system voltage on the PV modules or the maximum
system voltage of the PV system must be higher than 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 megaohms, 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 using cable fittings
DANGER
Risk of fatal injury due to electric shock
Severe injury or death will result if the live connections are touched. When there is sunlight present
on the photovoltaic modules, there is DC voltage on the open ends of the DC cables.
› Do not touch the exposed ends of the cables.
› Avoid short circuits.