Brochure/Catalogue

Type II surge protection
Surge protection for low-voltage
consumer installations and electronics
Surge protection of type II
The Weidmüller VPU II series surge protection protects
low-voltage consumer installations and electronic devices
against voltage surges that arise through, for example,
atmospheric discharge (lightning) or switching activities
(transients).
The VPU II series satises the type II requirements
of IEC 61643-11:2011 and type 2 requirements of
EN 61643-11:2012.
Electrical connection
Connect the VPU II surge protection between the phase
conductors (L1, L2, L3) or, as the case may be, the neutral
conductor (N) and earth of the consumer installation. The
connecting conductors should be kept as short as possible.
A helpful feature is that the protective unit can rotate 180°.
Ensure that unprotected conductors (e.g. wires to the meter)
are not run parallel to protected wires.
The universal “3+1” circuit for TN or TT systems is available
from the Weidmüller product range.
The VPU II surge protection is available as a compact
module with 1, 2, 3 or 4 poles, with the PE connections
already internally connected within the module.
We can supply the following voltage rating versions:
U
n
: 48 V AC = U
c
: 75 V
U
n
: 120/240 V AC = U
c
: 150 V
U
n
: 240/400 V AC = U
c
: 280 V
U
n
: 400/690 V AC = U
c
: 400 V
U
n
: 470/600 V AC = U
c
: 600 V
U
n
: 750/1200 V AC = U
c
: 750 V
as well as for the 3+1 circuit and special types
for IT networks.
The VPU II series offers a choice of voltage (Un ≤ Uc) and
number of arresters to satisfy the various power systems.
The national regulations and safety information must be
observed, see IEC60364-5-53 or DIN VDE 0100 pt 534.
Functional checks, maintenance and approvals
VPU II surge modules can be checked visually by the user.
The visual check is simple to perform because the arrester is
provided with a thermal disconnector. If this has responded,
i.e. is no longer providing protection, the ag in the status
window changes from green to red.
A non-functioning arrester can be replaced by a qualied
technician without having to disconnect any wiring. The
plug-in top sections of varistors are coded according to
voltage. This means it is not possible to plug in the wrong
replacement varistor.
180°
C
C.32 2028840000
Lightning and surge protection for low voltage supply