Operating procedures vbt-80p – Vanguard VBT-80P User Manual
Page 5
Operating Procedures
VBT-80P
4
1.0 INTRODUCTION
1.2 General Description
The VBT-80P is a lightweight DC vacuum bottle tester made by Vanguard Instruments
Compa
ny.
The
VBT-
80P
t
e
s
t
s
a
va
c
uum
bot
t
l
e
’
s
i
nt
egr
i
t
y
by
a
ppl
yi
ng
a
DC
vol
t
a
ge
a
cr
os
s
t
he
bot
t
l
e
unde
r
t
e
s
t
.
A
s
i
mpl
e
“
PASS”
or
“
FAI
L”
me
s
s
age
i
ndi
ca
t
e
s
t
he
c
ondi
t
i
on
of
t
he
bot
t
l
e
af
t
e
r
each test.
The VBT-80P is rugged and field-portable. It is easy to operate and requires little training for
first-time users. Operating the VBT-80P only requires connecting the test leads to the vacuum
bottle, selecting the desired test voltage, current threshold, and test time duration, then initiating
the test. A keypad with 16 alphanumeric keys allows the user to control and enter circuit breaker
test data. A built-in thermal printer produces test results on 2.5-inch-wide thermal paper. The
VBT-80P test records can be stored in its FLASH EEPROM memory. Up to 84 records (of 16
r
e
a
di
ngs
ea
c
h)
c
a
n
be
s
t
or
e
d
i
n
t
he
VBT-
80P’
s
me
mor
y.
1.3 Functional Description
Using a voltage multiplier, the VBT-80P generates a programmable test voltage from 10,000Vdc
to 80,000Vdc in 1,000Vdc steps.
The test voltage can be applied for different time durations: 5 seconds, 10 seconds, 30 seconds, 1
mi
nut
e
,
or
2
mi
nut
e
s
.
The
c
ur
r
e
nt
t
hr
ough
t
he
bot
t
l
e
i
s
moni
t
or
e
d
by
t
he
VBT-
80P’
s
c
i
r
c
ui
t
r
y
during a test. If this test current exceeds a preset threshold, the test is terminated and a test
“
FAI
L”
me
s
s
age
wi
l
l
be
di
s
pl
aye
d
on
t
he
LCD.
The
“
TEST
FAI
L”
i
ndi
c
a
t
or
wi
l
l
a
l
s
o
be
illuminated on the front panel.
The over current threshold can be programmed for 100 micro-amps, 200 micro-amps, or 300
micro-amps.
A test is considered successful if the selected test voltage was applied for the entire test time and
the test current did not exceed the preset threshold.
The
VBT-
80P’
s
LCD
di
s
pl
ays
a
“
PASS”
me
s
s
age
a
l
ong
wi
t
h
t
he
t
e
s
t
vol
t
age
a
nd
t
e
s
t
dur
a
t
i
on
i
f
a
t
e
s
t
i
s
s
uc
c
e
s
s
f
ul
.
The
“
PASS”
a
nd
“
FAI
L””
me
s
s
age
ca
n
be
pr
i
nt
e
d
on
t
he
bui
l
t
-
i
n
t
he
r
ma
l
printer.
1.4 Furnished Test Accessories
The VBT-80P is supplied with one 10-foot long high-voltage test cable, one 10 foot long
voltage-return lead with alligator clamps. A Ground cable, power cord, and a shipping case are
also included with each VBT-80P.
Note
The VBT-80P high voltage cable can be replaced in the field. Do not remove this HV cable from
the connector except for cable replacement.