Overvoltage Protection; Disconnecting Connections - Kaco blueplanet 50.0 TL3 M1 WM OD IIGS Manual Del Usuario

3 Device version S, Basic + M: Switch off DC power supply externally via the combiner box (not supplied) using the DC
isolator switch.
» After shutdown, wait at least five minutes before opening the inverter.
8.6

Overvoltage protection

DANGER
Risk of fire if the overvoltage module is disconnected under load!
The connection terminals and fuse holder can be destroyed by arcing if disconnected or if the modules are
removed.
ü Switch-on sequence:
› Switch off the grid voltage by turning off the external circuit breakers.
› Switch off the PV generator using the DC isolator switch.
› The DC cables are still live!
› Check that there is no current in any of the DC cables using a clip-on ammeter.
› Only open the fuse holder once you have established that there is no current in the DC cables.
› Ensure that there is no voltage present on the grid connection terminals.
8.7

Disconnecting connections

8.7.1 AC connection
↻ It has been ensured that there is no AC/DC voltage present.
1 Unlock and open the housing door.
2 Unfasten the cables (L1/L2/L3/N/PEN) from the AC connection terminal [ T_45].
3 Detach the PE line from the earthing bolt [ T_20].
4 Unfasten the cable fitting and remove the cables through the cable fitting [ W_36].
8.7.2 DC connection
DANGER
Destruction of the DC plug connectors
DC plug connectors can be destroyed by arcing if disconnected while still live. It is absolutely essential that
the following shutdown sequence be carried out in the correct order:
› Check that there is no current in any of the DC cables using a clip-on ammeter.
› XL device version: Disconnect all DC connections one by one. Device version S, Basic and M: Detach DC
connection in the device.
↻ Ensure there is no AC/DC voltage present.
↻ Check that there is no current using a clip-on ammeter.
↻ NOTE: Plug connectors may be unplugged under voltage, but never under
load.
1 Use a screwdriver (blade width 3 mm) to push out the latch on the coupling.
2 Leave the screwdriver in place.
3 Disconnect the DC connector from the DC socket.
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Fig. 27: Unplugging the plug con-
nector
1 Screwdriver
2 Latch
KACO blueplanet 50.0 TL3
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