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Installation instructions
EN Surge Protective Device
Item no.
Type
5095 366
V20-0-320
5095 171
V20-1-320
5095 173
V20-3-320
5095 261
V20-1+NPE-320
5095 253
V20-3+NPE-320
5095 291
V20-1+FS-320
5095 293
V20-3+FS-320
5095 341 V20-1+NPE+FS-320
5095 343 V20-3+NPE+FS-320
5095 600
C20-0-255
*
Figure
1
Product description
Surge protective device for equipotential bonding
of power supply systems according to VDE 0100-
443 (IEC 60364-4-44). For mounting on hat rails
and use in distributor housings. Arresters (Figure
) can be connected individually and are en-
1
coded on the rear side, in order to avoid incorrect
connection. They possess a thermodynamic cut-
off unit and have an arresting capacity of up to 40
kA (8/20) per pole.
If there is an error, the visual display switches
from green (grey) to red (Figure
With snap-on hat rail bracket (Figure
The spark gap C20-0-255 is intended as an ar-
rester between the neutral conductor N and the
protective conductor (PE conductor).
Only V20-..+FS..: With module for remote sig-
nalling through potential-free changeover contact
(Figure
).
Target group
The device may only be mounted and connected
by an electrical technician.
General safety information
• Before working on power cables, ensure that
they are de-energised and secure them against
unintentional switch-on!
• Do not carry out mounting work during a storm!
• Comply with national laws and standards, e.g.
VDE 0100-534 (IEC 60364-5-53)!
OBO Bettermann GmbH & Co. KG
Product
Single arrester*
Single pole
Three-pole
Single-pole with NPE
Three-pole with NPE
Single-pole with FS
Three-pole with FS
Single-pole with NPE and
FS
Three-pole with NPE and
FS
Single arrester*
Mounting and installation
The device can be installed in any position (e.g.
vertical or horizontal).
Figure
specifies that,
– in the case of single-branch wiring,
– or, in the case of V wiring,
should never exceed 0.5 m.
For V wiring, use the connection terminal, item
).
no. 5012 010.
).
2
• Clamp the protection device onto the hat rail,
• Maintain the stripping length and tightening
• Connection according to the circuit diagram
Protection path
I
Total
–
–
L – PE/N
–
L – PE/N
120 kA
L – N, N – PE
60 kA
L – N, N – PE
60 kA
L – PE/N
–
L – PE/N
120 kA
L – N, N – PE
60 kA
L – N, N – PE
60 kA
–
–
: VDE 0100-534 (IEC 60364-5-53)
connection length a + b
length c
Caution! Risk of overloading!
The connection terminal 5012 010 is
approved for a maximum current load ≤ 50
A.
Use a suitable back-up fuse!
ensuring that the lockable hat rail holder is un-
locked (Figure
).
2
torque (Figure
).
(TN systems or TN-S / TT systems).
V20-...-320
Circuit
EN
I
diagram
PE
Figure
–
–
< 250 μA
1
< 50 μA
3
< 2 μA
5
< 2 μA
7
< 250 μA
1
< 50 μA
3
< 2 μA
5
< 2 μA
7
–
–
the total
1
the connection
2
8
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