Siemens Cerberus CS1140 Manual page 75

Building Technologies
Fire Safety & Security Products
Z3I040, Z3I120, Z3I130 Surge protector set (superseded by Z3I041, Z3I121)
Function of the fuse
Essential to interrupt the mains lead after spark over of the surge protector.
Only use slow-blow fuses with "high breaking capacity". Depending on the fuse
in the mains lead, use fuses between 6 A and 10 A.
Surge protector cartridges (UCV...)
The plug-in surge protector cartridges model UCV... consist of an inert gas-filled,
high-performance surge protector with zinc oxide varistor connected in parallel.
Inspection and replacement:
Make a visual check when servicing the control unit. Preventive replacement of
–
the UCV is not necessary
brown or black discoloration of the porcelain body = defective UCV
–
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