Replacing String Fuses; Safety; Preparation - Fronius String Control 250/25 DCD DF Instructions De Service

Replacing String Fuses

Safety

Preparation

Replacing
String Fuses
When replacing string fuses, the protection against contact can remain in
the device.
For reasons of clarity, the protection against contact has been left out of
the following illustrations.
WARNING! Operating the equipment incorrectly can cause
serious injury and damage. The following activities must only
be carried out by trained and qualified personnel. Follow the
safety rules in these operating instructions.
WARNING! An electrical shock can be fatal. Danger from DC
voltage from solar modules.
- Make sure that the input and output sides in front of the
device are not charged before conducting maintenance
work.
- Never remove a fuse while it is under load.
Interrupt the connection to the AC supply lines using the inverter AC
1
disconnector
Attach a clearly legible and easy-to-understand warning sign to pre-
2
vent anyone from switching it back on or from reconnecting any open
or interrupted connections
Check to make sure that solar module strings are deenergized
3
Short circuit solar module strings
Remove the cover
5
Test the fuse holder at the terminals for continuity
6 6
NOTE Only use fuses for solar modules that meet the proper
requirements for string fuses.
Fuse dimensions: Diameter 10 x 38 mm
38