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PP30/PP40/PP85
- Surge/HiPot PowerPack
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Click
on Image to Enlarge
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PP30, PP40 and PP85 power packs are
high powered impulse generators used to test
very large high voltage windings. The output
is controlled by a variable transformer from
2,000 volts up to a maximum of 40,000 volts
(PP30 and PP85 - 30,000V; PP40 - 40,000V)
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The
power packs
perform both surge
and DC HiPot tests
when used with the D12R
or AWAIV-12 (PP30) as
the control and
display. They
incorporate a
supply monitor to
insure safe
operation from a
well grounded
supply. In
addition, 60kV
rated test lead
cables are
provided. |
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The
key element of the
surge test circuit
is a grounded grid
hydrogen thyratron
tube. The tube
conducts very high
peak current
(1000's of amps).
Such high
instantaneous
currents are
needed to fully
test very low
impedance windings
of large motors or
form wound coils.
This current is
only produced for
a few microseconds
by the discharge
of a 0.1
microfarad
capacitor.
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Voltage
rise time is
100-200
nanoseconds, so
the power
packs comply
with IEEE standard
522-2004 and IEC
Standard 34-15
when testing motor
windings and
coils.
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The
DC HiPot test can
also be done with
the power packs
along with the D12R
or AWAIV-12
(PP30). Test
voltages are set
by the output
control from 2,000
volts to 40,000
volts. Current is
displayed and a
trip circuit
monitors the test.
If current exceeds
the trip level,
the test is
automatically
halted. In its
most sensitive
setting, the
protective circuit
will operate as
low as 10ľA.
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In
addition, the D12R,
or the AWAIV-12
also monitors
current. This
provides a
redundant level of
safety for the DC
HiPot test.
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The
power packs are
housed in a mobile
case on pneumatic
wheels. They
provide power and
accessory
connections from
the D12R, or AWAIV-12
as well as lead
storage in a
convenient
portable unit.
These features
make these power
packs powerful testers.
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