Connecting The Pv Generator To The Device - Kaco blueplanet 87.0 TL3 M1 WM OD IIF0 Operating Instruction

NOTE
If a residual current circuit breaker is necessary due to the installation specification, a type A residual cur-
rent circuit breaker must be used.
If the type A is used, the insulation threshold must be set to greater than/equal to (≥) 200kOhm in the "DC
parameters" menu Configuration via web user interface.
For questions regarding the appropriate type, please contact the installer or our KACO new energy cus-
tomer service.
7.6

Connecting the PV generator to the device

7.6.1 Checking the PV generator for a ground fault
DANGER
Risk of fatal injury due to electric shock!
Severe injuries or death will result if the live connections are touched. When there is solar radiation on the
PV generator, DC voltage will be present at the open ends of the DC cables.
› Activate the connection power at the switchbox or string combiner with the DC isolator switch.
› The DC connection is intended exclusively for PV generators. Other sources fall within the scope of im-
proper operation (e.g. batteries).
› Only touch the PV generator cables on the insulation. Do not touch the exposed ends of the cables.
› Avoid short circuits.
› Do not connect any strings with a ground fault to the device.
Ensuring 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 de-
vice will not feed in if the insulation resistance is too low.
6 Rectify any faults before connecting the DC generator.
7.6.2 Configuring the PV generator
CAUTION
Damage to components due to faulty configuration
In the expected temperature range of the PV generator the values for the no-load-voltage and the short
circuit current must never exceed the values for U
› Observe limit values in accordance with the technical data.
NOTE
Type and configuration of the PV modules.
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
Page 22
DCMAX
KACO blueplanet 87.0 TL3 KACO blueplanet 92.0 TL3 KACO blueplanet 110 TL3 KACO blueplanet 125 TL3
and I in accordance with the technical data.
SCMAX
KACO blueplanet 137 TL3 KACO blueplanet 150 TL3