Brochure/Catalogue

Type II surge protection
LCF function
The leakage current free protection circuit (LCF function) is
achieved by connecting the varistor and sparkover gap in
series.
This protection circuit is needed in the case of an insulation
monitoring device, for example.
Connection
The cross-section of the earth conductor is in accordance
with the requirements of the national standards.
The fuse for VPU II modules is selected on the basis of
conductor cross-section and type of routing. A maximum of
125 A gG/gL is permitted.
VPU II series arresters from Weidmüller are suitable for the
following cross-sections:
solid wire: 2.5...16 mm
2
stranded wire: 2.5...50 mm
2
exible: 2.5...25 mm
2
The operating temperature range is –40 °C...+70 °C.
V-form connection
When using cross-connections from the RCD or fuses to the
VPU II, a V-form wiring arrangement can be used.
Remote signalling contact (R)
All modules of the VPU II series are available with the
option of a remote signalling contact which is integrated
directly in the module. This potential-free contact should
be connected as a changeover contact using a PUSH
IN plug connection. The contact‘s electrical data is:
250 V AC / 1 A or 24 V DC / 0.1 A.
Co-ordination with other arresters
The VPU II series can be installed with the following
Weidmüller surge protection devices without decoupling.
LPZ 0A LPZ 1LPZ 2LPZ 3
Coordination IEC 62305-4
Type 1
Type I
Type 2
Type II
Type 3
Type III
VPU I LCF VPU II series VPU III SO series
VPU I TSG+ VPU II series
VPU I series VPU III series
Dimensional drawing VPU II series
29
105.7
94
45
44
50
76
77.5
Overall width
VPU II, single-pole, 18 mm
VPU II, two-pole, 36 mm
VPU II, three-pole, 54 mm
VPU II, four-pole, 72 mm
Accessories: Remote signalling contact
Type
Remote signalling
contact
PLUG VPU 1402570000
C
C.332028840000
Lightning and surge protection for low voltage supply