55
4.6. CHECK OF INTERNAL PROTECTION DEVICES
The device includes two internal protection devices that cannot be reset and that the user cannot replace. These devices act only
under extreme conditions (e.g. a lightning strike).
To check the condition of these protections:
SET UP
OFF
LOOP
Z
S
03
/
07
/
2014 10
:
47
50 . 0
Ω
50 . 1 Hz
L-PE
V
L-N
V
N-PE
V
6 %
6 mA
Disconnect the input terminals.
If the internal protection devices are intact, the display should indicate:
Set the switch to Z
S
(R
A
/S
EL.
).
50 . 0
Ω
50 . 1 Hz
L-PE
0
.
0
V
L-N
V
N-PE
V
6 %
LOOP
Z
S
03
/
07
/
2014 10
:
47
6 mA
50 . 0
Ω
50 . 1 Hz
L-PE
V
L-N
V
N-PE
0
.
0
V
6 %
LOOP
Z
S
03
/
07
/
2014 10
:
47
6 mA
50 . 0
Ω
50 . 1 Hz
L-PE
0
.
0
V
L-N
0
.
0
V
N-PE
0
.
0
V
6 %
LOOP
Z
S
03
/
07
/
2014 10
:
47
6 mA
If U
L-PE
does not display – x --, the
protection in the L terminal has been
activated.
If U
N-PE
does not display – x --, the
protection in the N terminal has been
activated.
Case where both protections have
been activated.
In these last three cases, the device must be sent in for repair (see §8.5).
