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The
D15R/D65R Digital
winding tester can
perform
Resistance, HiPot
and Surge tests,
as well as
digitize and store
data for future
use. |
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The
Resistance test
verifies the
existence of dead
shorts within the
turn-to-turn
coils, shows any
imbalances between
phased due to turn
count differences,
along with
locating poor wire
connections or
contacts.
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DC
HiPot testing
detects faults in
groundwall/earth
insulation, and
also provides a
complete
Polarization Index
test. The
groundwall/earth
insulation system
consists of the
wires insulation,
slot liner
insulation,
wedges, varnish,
and sometimes
phase paper.
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Surge
testing detects
faults in both
inter-turn,
winding and
phase-to-phase
insulation
systems. Using
advanced
analog-to-digital
conversion
hardware, the D
series captures
the surge test
waveform,
remembers it,
displays it
indefinitely, and
outputs it to a
printer.
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The
D series tester
can be used to
test all rotating
fields of a
synchronous motor
by storing the
waveform from a
surge test on one
coil, and
comparing that
waveform to the
waveform from
every other coil.
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The
D series tester
can be operated on
its own in the
field, and then
data can be
transferred to a
computer running
Baker's Motor Test
Acquisition (MTA)
software for
further analysis.
MTA provides
database
capabilities,
waveform
comparison, report
generation,
printouts, and
other functions
that turns test
data into usable
information. All
options are easily
assessed with
on-screen prompts.
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D65R
only - The
lower impedance of
series-wound
armatures
(traction motors,
transit and lift
truck armatures)
make accurate
surge testing of
these coils
difficult. The
D65R allows the
user to safely
test these coils
using higher
currents. When
testing these
coils a specific
voltage is applied
on adjacent
commutator bars
reducing the need
for excessively
high voltage that
could potential
damage the coil.
Inter-bar voltages
can be varied from
50 to 900 volts on
large,
cross-connected
equalized
armatures. This
bar-to-bar testing
is the preferred
method of testing
DC armatures used
by manufacturers
and rebuilders.
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Storage
of test data for
up to 10 motors -
3 surge wave
patterns with
amplitude &
time base, surge
test peak voltage
amplitude, DC
HiPot voltage,
leakage current
and insulation
resistance.
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Baker's
QRR reliability
high voltage
design.
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Zero
start interlock
for tester high
voltage output.
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HiPot
over-current
safety warning
indicator.
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Test
lead insulated to
40 kV rating.
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Dedicated
test leads for
resistance
testing.
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Test
lead select switch
with all leads
grounded operator
safety position.
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