Velocity measurement simulation transformer internal faults
using the pressure-difference method measuring pulse velocity
principle by the department of energy power company organize
national experts technical reviews think: testing principle
is advanced, the measurement error rate is minor, discrete
accords with a requirement, easy to carry, suitable for
the field use, is the country much-needed test equipment,
good application value. Using the northeast, huazhong, yunnan
comprehensive measurement datum, can be in a nationwide
applicable. New design has two kinds of error correction
device, the measurement precision is accord with domestic
and abroad standard calibration Taiwan inspection requirements.
Function more and more wide application scope. Function
of 11, besides having direct test QJ - 25, 50, QJ -- --
QJ 80, QJ - 50W, 80W type QJ - relay velocity, volume, sealing
inspection items outside, still can satisfy transformer
YSF - 25, 50, 80, 130 disc-type pressure relief valve to
open and close the pressure test. This tester is a high
degree of automation. Using the microcomputer detection-control,
digital display, operation test except artificially cooperate
return oil outside, realized the measurement, parameter
adjustment, the control operation, record print automation.
This tester technical performance completely can replace
stationary pump, and the calibration method platform use
because of its small volume, easy to carry, satisfies site
test, saving equipment and LABS need plenty of investment,
etc. HRLC - 8/8QYG tester is equipped with QJ - 25, 50,
80 velocity of the ruler, respectively 3 direct test same
model gas relay action and velocity tester for regular check,
is the ideal value transmit.in tools. This tester is realized
gas relay velocity, volume, seal test and pressure relief
valves open and close inspection items, such as stress,
fully automated test and printed out.
1) Type HRLC-8/8QYG
HRLC verification code. HR representative huarui company
and patent inventor, L, C representative "velocity"
representative "ruler", because of the first generation
of design products as "velocity measurement feet",
after the product unceasing renewal all lihe "HRLC".
8/8QYG type: 8 represents the first 8 times design serial
number, Q is for gas relay, Y represents pressure relief
valves, 8QYG representative gas relay and pressure relief
valve automatically tester.
2) basic parameter
a) Gas relay velocity setting: Velocity range: 0.6 ~ 1.6
m/s (specific setting value see procedures), Precision:
pressure sensor precision 0.5 level, digital displays for
4 digits, 0.000 m/s, minimum resolution 0.02 m/s. Factory
test 80HRLC standard by QJ - velocity ruler and standard
checking Taiwan calibration, its absolute error acuities
0.04 m/s, with tester for velocity test, measurement values
can be printed automatically records.
b) Volume test: Volume measurement device measuring element
precision 0.5 level, minimum resolution for the test, the
factory 5ml by 300ml standard cups of test, its biggest
error acuities 5%, measured values can be printed automatically
c) Pressure (seal) test: Pressure range is 0 ~ 150kpa, digital
displays for 000.0 kpa, minimum resolution 1kpa, precision
1.5 level. Gas relay full of transformer oil at room temperature
15kpa sustained pressure 20Min should be no leakage, measured
values can be printed automatically records.
d) Test medium: gas relay calibration table test medium
for transformer oil, Pressure relief valve check table test
medium for air.
e) HRLC - QJ25, QJ50, QJ80 type velocity ruler
f) Microcomputer detection-control box. Power supply: 1
phi 220V 150W
g) Electric miniature air compressor: 1 phi 220V 120W