Bender: Safe rail transport
Safe rail transport with Bender insulation monitoring devices
If we consider that the power supply sys-
tem in railway transport must meet high
demands on operability and safety, it is lo-
gical that the installation is carried out
using an isolated system, which is then
monitored by means of isolation conditi-
on watchdogs.
However, the power supply system does
not have to be monitored only by isolati-
on watchdogs as required by EN 61557-
8, but can be actively searched for iso-
lation faults during operation according
to EN 61557-9 and thus use systems for
locating isolation faults, whether perma-
nently installed or portable.
Specific environments and applications
also require higher demands on equip-
ment resistance to shock, vibration and
requirements for a wider range of opera-
ting temperatures.
For DC networks, it is also a useful para-
meter to determine which pole the insula-
tion fault occurred in and also the measu-
red value of the L+/PE and L-/PE voltages
with respect to grounding.
The response to these requirements fea-
tures isoHV and isoRW series that have
been specifically developed and tested by
many years of practice.
As the product name suggests,
ISOMETR is a device that is designed to
monitor the insulation condition with spe-
cific characteristics for Rail-Ways. All devi-
ces are designed not only for rail transport
applications, but also wherever deman-
ding conditions for operation and reliabili-
ty are required.
It is only thanks to you, our customers,
who trust these devices and their reliabili-
ty that we can say that these devices mo-
nitor more than 5,600 power systems in
rail transport today.
The result of several years of develop-
ment by engineers is the very compact
monitoring device isoHV425W, which al-
lows monitoring of insulation resistance in
networks (IT) with a voltage of 0–1 000 V
3(N)AC, AC/DC. The DC components in
combined AC/DC systems do not affect
the operating characteristics of the equip-
ment. It enables applications in the most
adverse conditions with an operating tem-
perature range of –40 to +70 °C. These
devices are ideal for applications that
may be subjected to severe shocks or vi-
bration. A separate, isolated power supp-
ly allows monitoring of systems without
voltage.
The devices meet the requirements of
standards ČSN EN 61557-8 and ČSN EN
TT ++ TT
Technika a trh 5/2023
14
FEATURES
• Measurement of the insulation condition of IT networks 3(N)AC, AC/DC
• Measurement of mains voltage to grounding L+/PE and L–/PE
• Setting parameters via the web interface
• L+/L– isolation fault detection with independent signalling on programmable output contacts
• Measurement and self-adjustment of the dispersion capacity of the network
• RS-485 bus with Modbus RTU or TCP protocol and analogue output
(depending on the type of device)
• Option to protect the device settings with a password
• Operating temperature from –40 °C to +70 °C
Safe rail transport
with BENDER
devices
A key aspect for the smooth operation of rail transport is to ensure continuous
operability. One of the parameters is ensuring the electrical safety of the power
supply parts, signalling and safety systems, tunnel installations, as well
as towing vehicles. A common aspect of these complex power
systems is that in the long run, the installation is almost certain
to avoid insulation problems.
They already monitor more
than 5600 IT systems
rail transport
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