Connecting The Pv Generator - Kaco Powador 12.0 TL3 - INT Operating Manual

Electrical connection
Authorised electrician
Checking the PV generator for a ground fault
EN EN
1. Determine the DC voltage between:
–
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:
–
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.
7.3.3 Designing the PV generator
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
MPP tracker
7.4

Connecting the PV generator

Connect the PV generator to the 4 DC positive and the 4 DC negative connection plugs on the underside of the
housing (see Figure 18 on page 21). Note the wiring examples given below. The inverter detects these typical
configurations automatically. In individual cases, you need to set the selected DC connection after installation in the
menu.
Risk of fatal injury due to contact voltages.
Removing the plug connection before disconnecting the inverter from the PV generator may lead to
injuries and damage the unit.
›
›
CAUTION
Damage to the device in case of faulty configuration of the DC connector.
A faulty configuration of the DC connector (polarity +/-) causes equipment damages in the DC
connection if it is connected permanently.
Page 20
P
max
<20 kW
DANGER
During installation: Electrically disconnect the DC positive and DC negative from the protective
earth (PE).
Remove the plug connector.
Please check polarity (+/-) of the DC connector before connecting the DC generator
The DC voltage must not exceed 1000V at any time.
I MPP tracker
rated max.
<18,6 A
Operating Instructions Powador 12.0 TL3-20.0 TL3
I MPP tracker
SC max.
<22,4 A