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o. The ALVL limiters are maintenance
free, have high insulation resistance value
(kW) and high protection capability.
4.
Bratri Stefanu 1170
Hradec Kralove 500 03
Czech Republic
tel. Based varistor
polarity, the corresponding thyristor being
activated and the current flowing through the
activated varistor, now starts flow through
the thyristor. Especially after
extreme weather conditions i. Also
check they are not excessively covered by
dirt.e.
Type Non-triggering
voltage UW
Nominal triggering
voltage US
ALVL DC
ALVL 120 120 DC
The Declaration Conformity the
product available for download our
website www. ALVL consists
of MOV varistors, high-power thyristors and
electronic components (differential delay
element), which within about msec can
activate both in-built high-power thyristors.2. FIELD APPLICATION AND PLACE
ALVL and ALVL 120 low voltage limiters,
recoverable VLD 2. can perform the installation.
Recommended mounting position vertical
bracket up.com
. has hydrophobic
properties and shows excellent resistance to
weathering, contamination, light well
as harsh treatment and mechanical damage. storms.
During the process the standards must be
followed (ČSN 50526-3. CHARACTERISTICS PRODUCT
AND BASIC PROPERTIES
If overvoltage occurs for longer period of
time (milliseconds hours) the thyristors
fire limit touch voltage value.
The limiter has installed directly between
the elements the protected structures
(using two bolts M12) the event its
activation has occurred desired equipotential
between them. case of
a failure due connection between live part
of traction power supply system and the
conductive part accidentally connected to
the return circuit, the limiter protects against
impermissible touch voltage becoming
conductive and causing cut-off the current
flow. is
therefore recommended test the ALVL in
regular intervals... Functional check ALVL
Overload the ALVL limiters may lead to
a fault one even both thyristors.
The connecting conductors can made with
a circular section. Minimum cross-connecting
wire (Cu) mm2
, recommended cross
section mm2
.
Before you can perform the control
measurement you must disconnect the low
voltage limiter.
During assembly necessary respect the
principles occupational safety and health. According 50122-1:2011 this type
of limiter recommended mainly for the
connection between the protected part and
return circuit the overhead line zones (or
pantograph zones) that may contact
with the conductors damaged current
collector, then the support structures
of pylons which can become live due an
insulation failure. soon
as the overvoltage condition ends, the
thyristors cut off the current flow and the
original condition restored.2022
ALVL*
ACER VOLTAGE s.acervoltage.: +420 491 618 571
info@acervoltage. The
housing made silicone caoutchouc which
has great resistance surface creepage
currents and electric arc.2 class (bi-directional),
VLD-O+F type, used primarily traction
systems protect against electric shock
when touching non-live metal parts of
structures power supply systems.
Check the limiters are not mechanically
damaged regular intervals.r.
They are used effectively protect persons,
who may come into contact with these
parts during lightning strikes case a
defect the traction power line..). The limiter designed way
enabling transmitting high temperatures
rising inside the equipment into the aluminium
structure.
3.com
In Hradec Kralove 23.Instructions
for installing of
low-voltage limiters
ALVL 60
ALVL 120
1.acervoltage. the spot you can perform
a complete check the voltage limiter by
means insulation testing device such as
for instance Megger MIT 1025 Fluke 1555.
Such activation corresponds the voltage
drop across the varistor.
2.GENERALRULES FORLIMITERCONNECTION
Only the authorized person with an
appropriate certification according ČSN EN
50110-1 ed.com
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