Connect Pv Generator To Device; Checking The Pv Generator For A Ground Fault - Kaco blueplanet 50.0TL3 Betriebsanleitung

Operating Instruction I
NOTE
If an external residual current circuit breaker is required due to the installation regulation, a type A residual
current circuit breaker is to be used.
When using type A, the insulation threshold must be set to greater than/equal to (≥) 200kOhm in the "Para-
meters" menu. Menu.
If you have any questions about the appropriate type, please contact the installer or our KACO new energy cus-
tomer service.
NOTE
When the line resistance is high, i.e. long cables on the grid side, the voltage at the grid terminals of the device
will increase in feed-in mode. If the voltage exceeds the country-specific grid overvoltage limit value, the device
switches off.
1. Ensure that the cable cross-sections are sufficiently large or that the cable lengths are sufficiently short.
6.6

Connect PV generator to device

6.6.1

Checking the PV generator for a ground fault

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 PV
generator, there is DC voltage on the open ends of the DC cables.
1. Only touch the PV generator cables on the insulation. Do not touch the exposed ends of the cables.
2. Avoid short circuits.
3. Do not connect any strings with a ground fault to the device.
NOTE
The threshold value from which the insulation monitor reports an error can be set in the "Parameters"
menu.
Ensure that there is no ground fault
1. Measure the DC voltage between the protective earth (PE) and the positive cable of the PV generator.
2. Measure the DC voltage between the protective earth (PE) and the negative cable of the PV generator.
ð 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.
3. Rectify any faults before taking further measurements.
4. Measure the electrical resistance between the protective earth (PE) and the positive cable of the PV generator.
5. Measure the electrical resistance between the protective earth (PE) and the negative cable of the PV generator.
ð In addition, ensure that the PV generator has a total insulation resistance of more than 2.0 MOhm, since the
device will not feed in if the insulation resistance is too low.
6. Rectify any faults before connecting the DC generator.
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