Page 9 - Pipelines

Limitation behaviour of
VCSD 40 IP65 as a function 2000 Voltage limits acc. to EN 50443 Performance of VCSD 40 IP65
of time 1500 fault interference operating limiting
1 Transient overvoltage is 1 duration voltage time voltage
< 0.001 s 1250 V
limited to values < 1.25 kV 1250 ≤ 0.100 s 2000 V 0.001 s ≤ 0.020 s ≤ 940 V peak
(duration: up to 1 ms). voltage [V] rms 0.020 s ≤ 0.100 s ≤ 660 V rms
rms
2 Temporary overvoltage 1000 0.100 s ≤ 0.200 s 1500 V rms 0.100 s ≤ 0.200 s ≤ 400 V rms
is limited to values < 940 V 650 0.200 s ≤ 0.350 s 1000 V rms
depending on the duration 0.350 s ≤ 0.500 s 650 V rms 50 V rms
0.500 s ≤ 1.000 s
430 V
(duration: 1 ms up to 200 ms). 430 1.000 s ≤ 3.000 s 150 V rms > 0.200 s (adjustable
from 3-50 V)
3 Long-duration overvoltage > 3.000 s 60 V rms
rms
is limited to values between 3 150 2
and 50 V a.c. (freely adjustable) 60 3
(duration: > 200 ms). 0.1 0.35 1.0 3.0
0.2 0.5 time [s]
Functional description EXFS
A single component is not
enough to efficiently limit over- Pipeline
voltage.
digital. I/O analog
VCSD 40 IP65 from DEHN eva-
luates different sensor signals VCSD
via a control unit, thus coordi-
nating the interaction of the in- remote H
signalling
dividual functional units consis- TU contact CU PS PU TU: Transient Unit
ting of power electronics and CU: Control Unit
a spark gap. Consequently, PS: Power Supply
PU: Power Unit
VCSD 40 IP65 ensures coordi- EXFS: Isolated spark
nated protection against transi- gap for use in
ent, temporary and long-dura- hazardous areas
tion overvoltage.

Monitoring / controlling
If a function-critical device VCSD telecontrol system
error occurs, the digital
output is activated. The USB
error can be externally digital in digital out
indicated or an external analogue out
fail-safe switch (FSS) can be
activated. digital out digital in

VCSD 40 IP65 can be
switched on and off via a
digital input.

Contact open: VCSD on 9 ... 32 V +
Contact closed: VCSD off

The instantaneous value
of the discharge current
can be indicated in the VCSD Data logger
form of a 4-20 mA signal
(scaled to 0-40 A) via the USB analogue
analogue output. In case digital in in
of a function-critical device
error, a fixed value of 21.8 analogue out
mA is indicated. digital out
External voltage
An external voltage supply supply
is required to perform a
self-test (testing the VCSD)
and to supply the analogue
output. 9 ... 32 V +

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