Replacing The String Fuses; Shutting Down For Maintenance / Troubleshooting - Kaco blueplanet 50.0 TL3 M1 WM OD IIGS Mode D'emploi

8.4

Replacing the string fuses

DANGER
Risk of fire if the fuse holder is disconnected under load!
The connection terminals and fuse holder can be destroyed by arcing if disconnected or if the fuses are re-
moved.
ü Switch-on sequence:
› Switch off the PV generator using the DC isolator switch.
› Danger 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.
↻ Use a clip-on ammeter to check the current flow in each DC string.
- If there is no current flow, the string fuse must be checked:
↻ The shutdown sequence in the preceding warning has been carried out.
1 Unlock and open the housing door.
2 Open the relevant DC fuse holder.
3 Use a multimeter to check the DC fuse for flow.
- Flow: Reinsert DC fuse in the fuse holder and close.
- No flow: Replace DC fuse.
4 Check for other sources of interference on the DC string (fault on cable/modules / DC plugs (XL version), polarity and
design)
Replacing the string fuses
1 Remove defective DC fuse from the fuse holder.
NOTE: DC fuses can be ordered from the KACO customer service team.
2 Insert DC fuse of the same type into the fuse holder.
3 Ensure the DC fuse holder is completely closed after fitting.
» Fuse holders are fitted with fuses. Close the housing door and switch on the in-
verter as described in chapter .
8.5

Shutting down for maintenance / troubleshooting

DANGER
Lethal voltages are still present in the connections and cables of the device even after the device has
been switched off and disconnected!
Severe injuries or death may occur if the cables and/or terminals/busbars in the device are touched.
Only appropriately qualified electricians authorised by the mains supply network operator are permitted to
open and maintain the device.
› Comply with all safety regulations and current technical connection specifications of the responsible
power supply company.
NOTE: Shutdown sequence
1 Switch off the grid voltage by turning off the external circuit breakers.
2 Disconnect the DC side depending on the device version:
- XL: Device version: Switch off the DC supply using the DC isolator switch.
DANGER! The DC cables are still live!
KACO blueplanet 50.0 TL3
2
1
Fig. 26: Insert DC fuse
1 Fuse holder
2 DC fuse
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