Page 104 - Surge-Protection-E_0.pdf

Surge Arresters – Type 2
CIRCUIT INTERRUPTION
FUSE INTEGRATED
V NH / VA NH
• Surge arrester for use in NH 00 and 1 fuse holders
• Zinc oxide varistor with monitoring device, disconnector and
integrated backup fuse (VA NH... with additional spark gap
connected in series)
• Energy coordination with other arresters of the Red/Line
product family
• Fault indication by tripping indicator

For protecting low voltage consumer installations against surges. For installation
in conformity with the lightning protection zone concept at the boundaries from
0B – 1 and higher. German patented design.

V(A) NH00 2a80: Surge arrester for use in NH00 fuse holders
V(A) NH1 280: Surge arrester for use in NH1 fuse holders
V(A) NH00 280 FM: With fault indicator for remote signalling; allows for use of NH fuse holders with microswitch
(max. tripping distance of indicator of 7 mm)

The single-pole V NH and VA NH surge arresters show that surge protective
devices do not necessarily have to be designed for DIN rails or socket
outlets. Adapted to the requirements in industrial sub-circuit distribution
boards, V NH and VA NH surge arresters are designed in the form of an NH
fuse holder. This makes integration into busbar systems, as they are fre-
quently used in the environment of utility and in industrial plants, easy.
Thus, these surge protective devices offer all the advantages of busbar
systems such as easy installation, low installation time and reduced wiring.
The idea of such a busbar system is consistently followed up with arresters
in NH design. V NH and VA NH surge arresters can be installed and removed
by means of a fuse switch-disconnector and a fuse handle. This considera-
bly facilitates insulation measurements in the installation as the arrester
does not have to be disconnected any more.
Another considerable ad-
vantage of the V NH / VA NH
family is that a backup fuse
is already integrated in the
arrester. In case of earth- version, a spark gap is connected in series with the heavy-duty zinc oxide
fault and short-circuit-proof varistor with thermal monitoring and disconnection device of the V NH
Surge Arresters – Type 2 costs and reduces space re- tems with permanent insulation monitoring. Apart from the standard visual
surge arresters. VA NH devices are used to reliably protect large-scale sys-
wiring, this saves significant
quirements in distribution
indication by a tripping indicator, V(A) NH ... FM surge arresters feature a
microswitch integrated in the NH fuse holder for remote signalling.
boards. In case of the VA NH

100 You will find detailed product information on our website Valid as of August 1, 2020