User Manual

34
Replacing String Fuses
Replacing
String Fuses
Interrupt the connection to the AC supply lines
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.
Safety
Preparation
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.
1
2
3
5
6
NOTE! Only use fuses for solar modules that meet the proper
requirements for string fuses.
Fuse dimensions: Diameter 0.41 x 1.38 - 1.50 in. (10.3 x 35 - 38
mm)
Attach a clearly legible and easy-to-understand warning sign to pre-
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
Short circuit solar module strings
Remove the cover
Test the fuse holder at the terminals for continuity