KACO Powador 16.0 TR3 - Manual (Page 21)

I n s t a l l i n g t h e I n v e r t e r
Page 22 Operating Instructions Powador 16.0 TR3, 18.0 TR3_EN
Authorised electrician
7.2.2.1 Before the connection
Ensure that there is no ground fault
1. Determine the DC voltage between the
– protective earth (PE) and the positive lead of the PV generator
– protective earth (PE) and the negative lead 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 lead of the PV generator
– protective earth (PE) and the negative lead of the
PV generator
Low resistance (< 2 MΩ) indicates a high-ohm ground fault of the DC generator.
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 injuries or death will result if the live connections are touched. When there is irradiance,
DC voltage is present on the exposed ends of the DC leads.
› Do not touch the exposed ends of the leads.
› Avoid short circuits.
1. Unscrew the cable fi ttings.
2. Remove the outer cladding of the DC leads.
3. Insert the DC leads through the cable fi ttings into the connection area.
4. Strip the insulation from the DC leads.
5. Connect the ends of the leads to the connections “PV+” and “PV-”.
6. Check that all connected leads are tightly seated.
7. Tighten the cable fi ttings.
8. Meet the requirements of protection rating IP54 by closing the unused cable fi ttings with blind caps.
» The inverter is connected to the PV generator.
7.2.3 Grounding the PV generator (optional)
Various manufacturers stipulate that the PV generator must be grounded. You can fi nd out which pole you need to
ground from the manufacturer of the photovoltaic modules. The full bridge needed for the grounding of the posi-
tive or negative poles of the PV generator is included with the unit. The required fuse is already installed in the unit.
DANGER
Risk of fatal injury due to electric shock
Severe injuries or death will result if the live connections are touched.
› Disconnect the inverter from all power sources.
› Wait at least fi ve minutes before working on the inverter.
› Then start with the grounding of the system.