Connecting The Pv Generator To The Device - Kaco blueplanet 87.0 TL3 Manual

Manual
Residual current monitoring unit (RCMU):
The device is equipped with an AC/DC-sensitive residual current monitoring unit in accordance with IEC/EN 62109-2 and
VDE 0126-1. The AC/DC-sensitive residual current monitoring unit monitors AC and DC residual currents and redundantly
disconnects the device from the grid in the event of residual current jumps of > 30 mA. In the event of a malfunction in
the residual current monitoring unit, all poles of the device are immediately disconnected from the public grid. The func-
tionality of the integrated RCMU is described in the document 'RCMU functionality +device type' on our website.
If local regulations require an external residual current circuit breaker (RCD), the recommendations in the document
"Confirmation of compatibility with residual current circuit breakers (RCD)" on our website must be observed.
NOTE
Observe the general earthing recommendation of the existing mains system.
NOTE
If an external residual current circuit breaker is necessary due to the installation specification, a type A residual
current circuit breaker must be used.
If the type A is used, the insulation threshold must be set to greater than/equal to (≥) 200 kOhm in the "DC
parameters" menu [see [See section 9.4.2} Page 52]].
For questions regarding the appropriate type, please contact the installer or our KACO new energy customer
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 injury 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.
1. Activate the connection power at the switchbox or string combiner with the DC isolator switch.
2. The DC connection is intended exclusively for PV generators. Other sources fall within the scope of im-
proper operation (e.g. batteries).
3. Only touch the PV generator cables on the insulation. Do not touch the exposed ends of the cables.
4. Avoid short circuits.
5. Do not connect any strings with a ground fault to the device.
6. The device must not be operated with negatively or positively earthed PV modules.
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 error.
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.
KACO blueplanet 87.0 TL3 KACO blueplanet 92.0 TL3 KACO blueplanet 105 TL3 KACO
blueplanet 110 TL3 KACO blueplanet 125 TL3 KACO blueplanet 137 TL3 KACO blue-
planet 150 TL3 KACO blueplanet 155 TL3 KACO blueplanet 165 TL3
Installation | 7
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