KACO Powador 30.0 - 60.0 TL3 - Manual (Page 22)

Installing the inverter
Page 22 Operating Instructions for Powador 30.0-72.0 TL3_EN
EN EN
Authorised electrician
7.3.2 Connecting the PV generator
Connect the PV generator on the right of the connection area (see Figure 10 on page 20).
Use the provided cable fi ttings.
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 fi rst 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
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
7.3.2.1 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.
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.
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.
NOTE
The threshold value from which the insulation monitor reports a fault can be set in the "Parameter"
menu.
7.3.2.2 Insert DC positive string fuses (only for XL version)
When delivered, there are short circuit bridges inserted into the fuse holder of each of the DC positive inputs per
MPP tracker. Nothing is fi tted into the remaining fuse holders when delivered.
For the fi tting of the fuse holders with string fuses, these items are with the inverter.
CAUTION
Damage to PV generator in case of faulty design of string fuses.
If the string fuses are too large, the PV generator can be damaged by excessive current.
Select suitable string fuses depending on possible short-circuit currents and the cable cross-sections
used. Refer to this when using the string fuses supplied.