DRAFT DGA-LT1 Installation Guide
2
Product
Overview
The
DGA
‐
LT1
is
a
remotely
‐
deployed
transformer
monitor
which
can
be
safely
installed
onto
an
energized
or
non
‐
energized
transformer
to
detect
and
measure
dissolved
hydrogen
found
in
an
electrical
power
transformer‘s
insulating
oil.
The
monitor
is
designed
and
constructed
to
operate
in
environmental
conditions
in
Power
Plants,
Switchyards
or
Substations.
The
DGA
‐
LT1
is
directly
mounted
to
an
existing
valve
on
the
transformer
and
circulates
transformer
oil
within
it
to
provide
a
continuous
reading
of
hydrogen
in
ppm.
Data
can
be
viewed
in
the
QualConnex®
web
application
to
track
the
hydrogen
ppm
levels
over
time
and
compare
against
user
‐
defined
caution
and
alarm
settings.
The
DGA
‐
LT1
is
a
battery
powered
wireless
sensor
that
transmits
encrypted
raw
signals
via
RF
frequency
to
the
QGateway
that
are
used
for
calculating
hydrogen
concentration,
moisture
concentration
and
temperature.
The
DGA
‐
LT1
measures
hydrogen
(H
2
)
without
cross
‐
interference
from
other
gases.
Hydrogen
is
formed
under
all
known
thermal
fault
conditions
in
the
transformer
and
is
one
of
the
first
gases
to
be
generated,
making
it
an
excellent
early
indicator
of
a
broad
range
of
fault
types.
The
DGA
‐
LT1
is
designed
to
be
installed
and
configured
by
the
end
‐
user.
Configuration
of
the
monitor’s
alarms,
settings
and
options
is
accomplished
using
the
QualConnex
web
interface.
