c
9 Maintenance
b
Rev. 04, 03/2015
133
9.2
Replacing of Fuses
Attention
Damage to the device! Short circuit!
The modules can be damaged if the wrong fuses are used.
Only use fuses which correspond to the fuses on the modules.
Two different types of fuses are used in the EVU. These fuse the individual modules
and mains inlets:
Basic module
The two mains fuses Si1 and Si2
on the basic module fuse the cur-
rent input.
If there is a defect in one of the
two fuses, no signal can be trans-
mitted over the measurement
channels.
Basic module The 5 A fuse Si3
fuses the error re-
lay.
If there is a defect
in the fuses, the
error relay does
not work.
Extension
module
The two 5 A fuses
Si3 and Si4 fuse
both alarm relays.
If there is a defect
in the fuses, the
alarm relay does
not work.
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