Electrical TEST Instruments and Apparatus with high resistance
meter
The Insulating Oil Dielectric Loss and Electrical Resistivity
Tester mainly used for measuring the dielectric loss factor
and DC resistivity of liquid medium, such as insulation oil. Etc.
The instrument is characterized by integrated structure, and
integrates the dielectric loss of test cell, temperature
controller, temperature sensor, dielectric loss test bridge, AC
test power, standard capacitor, high resistance meter, DC high
voltage source and other major components. The instrument adopts
full digital technology and all of the intelligent automatic
measurement, is equipped with large screen (240*128) LCD display
with full Chinese menu, which each step has prompted the Chinese,
the test results can be automatically stored and printed output, so
that the operator without professional training will be able to use
it proficiently.
Key Function And Feature:
- The test cell used three-electrode-type structure in accordance
with the national standard of GB/T5654-2007, with electrode gap
2mm, can eliminate the effect of stray capacitance and reducing
leakage on the dielectric loss test results.
- Instruments used medium frequency induction heating, PID
temperature control algorithm. The heating method can make the test
cell and heated without contact, and uniform heating, fast,
convenient control, and make the temperature strictly controlled
within the preset temperature range.
- Internal capacitor is SF6 gas-filled three-electrode capacitance,
its dielectric loss and capacitance is not affected by the ambient
temperature and humidity. It can make the instrument accuracy be
guaranteed after prolonged use.
- AC test power supply using AC-DC-AC conversion, effectively avoid
the fluctuations in mains voltage and frequency on dielectric loss
measurement accuracy effect. Even a generator, the instrument
can work properly.
- Perfect protection function; When there is over voltage,over
current or high-voltage short circuit, instruments can quickly cut
off pressure, and issues a warning message. When the temperature of
the sensor failure or not connected, the instrument will also issue
a warning message.
There is a temperature
limiting relay in the medium frequency induction heating furnace.
When temperature above 120 degrees, the instrument frees the relay
and stops heating.
- More convenient the experimental parameter is set. Temperature
setting range 0~125℃, AC voltage setting range 500~2200V, DC
voltage setting range 0~500V.
- Large LCD display with backlight and clear display, Friendly
human-machine interface, simply follow the Chinese characters menu
prompt, enter the command, the instrument can be automatically
tested, and automatically store and print test results.
- The instrument comes with real time clock, the test date and time
can be saved,displayed and printed with the test results.
- Test cell calibration. We can judge the test cell’s cleaning and
assembly by measuring electrode capacitance and dielectric loss
factor of the test cell. The calibration data is automatically
stored, in order to accurately calculate the relative permittivity
and the DC resistivity.
Panle Discription And Operation Notice:
1. PANLE DISCRIPTION:
- Instrument instructions and matters needing attention:
- Be sure to connect the ground cord firmly before start up the
equipment, and switch on AC220V power supply.
- Open protective cover, and take out the test cell;We should shut
the protective cover, when heating and testing the dielectric loss.
- The cover is protective and when you open it, will interrupt the
heating and high pressure.
- During the test, there is high pressure and high temperature. Do
not contact the test cell and cable when the power is on and
testing.
- Be careful so as not to sprinkle oil into the test cell receptacle
and the side panel when injecting and discharging oil.
- If there was a crash test, turn the system back on, restart the
instrument.
Instrument instructions and matters needing attention:
- Be sure to connect the ground cord firmly before start up the
equipment, and switch on AC220V power supply.
- Open protective cover, and take out the test cell;We should shut
the protective cover, when heating and testing the dielectric loss.
- The cover is protective and when you open it, will interrupt the
heating and high pressure.
- During the test, there is high pressure and high temperature. Do
not contact the test cell and cable when the power is on and
testing.
- Be careful so as not to sprinkle oil into the test cell receptacle
and the side panel when injecting and discharging oil.
- If there was a crash test, turn the system back on, restart the
instrument.
Use the appropriate power supply cables.
Only use the product-specific power supply line in accordance with
the product specification. Be right to disconnect and connect.
The instrument must be adequately grounded.
Note that rating value of all terminals.
Use the appropriate fuse.
Align the locating slot when the internal electrode into the
external electrode.
Special notice: This instrument has high voltage output, improper
use can compromise personal safety, prior to the use of this
instrument, be sure to read the instruction manual carefully!
There is type test report for it, test items as following:
Type Test Items | 1. appearance and structure 2.function 3. electrical device
performance 4.low temperature performance 5.high temperature
performance 6.alternating temperature humidity7.vibrationendurance
8.incline drop test 9. electrical device life 10. static
electricity and elecro-discharge immunity test 11.radio frequency
electromagnetic field radiated immunity test 12.surge impact
immunity test 13. power frequency magnetic field immunity test. 14.
Adjacent interference test 15.short-circuit withstand impact test
16. fire hazard test 17. power consumption test 18. protection
grade test 19. gripping strength test of grip structure. |