Weidmüller VPU I (Type I), VPU
II (Type II) and VPU III (Type III) surge protection products effectively reduce the
interference coupling that can occur from transient surge voltages, even significantly
below the limits prescribed by insulation co-ordination according to EN 60664-3 / DIN
VDE 0110-3. This means that the whole installation is exposed to
The arresters are co-ordinated using technical means.
This means that decoupling between Types I, II and III
is unnecessary. The arresters are tested according to product standard IEC 61643-11 / DIN EN
61643-11 and can be installed in systems according to IEC 61643-12 / VDE
V0675-6-12 and IEC 62305-4 / VDE 0185-4. This
lightning and surge protection device is suited for installation in
power supply systems. Weidmüller offers different products depending
on the particular mains network type and voltage level. A special Type I and Type II protective device
is available for photovoltaic applications.