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全自动Dielectric Loss Tester-扬州达瑞

Vacuum Switch Vacuum Degree Tester - Yangzhou Dary

Published: 2020-08-24 15:00:51

Views: 2922

Category: Switch Vacuum Degree

Product Description
Vacuum Switch Vacuum Degree Tester 

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Vacuum Switch Vacuum Degree Tester (English name: Vacuum Switch Vacuum Degree Tester or Vacuum Tester), is mainly used for quantitative measurement of the vacuum degree inside the arc extinguishing chamber of various types of vacuum switches. It uses a single-chip computer as the main control unit, and the testing process is fully automated. In principle, it changes the method of using current peak for calibration in similar products at home and abroad, and instead uses ion charge for calibration, effectively suppressing the interference of pulse power supply during the testing process, making the test more stable and reliable.

Testing Principle

The vacuum switch vacuum degree tester uses the magnetic discharge method for measurement. The two contacts of the vacuum switch arc extinguishing chamber are separated by a certain distance, a pulsed high voltage is applied, and the arc extinguishing chamber is placed inside a solenoid coil or a new type of electromagnetic coil is placed outside the arc extinguishing chamber, with a large current passed through the coil, thereby generating a pulsed magnetic field synchronized with the high voltage inside the arc extinguishing chamber. Thus, under the action of the pulsed strong magnetic field and strong electric field, the charged ions in the arc extinguishing chamber move in a spiral motion and collide with residual gas molecules to cause ionization. The resulting ion current is approximately proportional to the residual gas density, i.e., the vacuum degree. For different vacuum tube models (tube types), due to their different structures, under the same contact gap, same vacuum degree, and same electric and magnetic fields, the magnitude of the ion current is different. Through experiments, the corresponding relationship curves between vacuum degree and ion current for various tube types can be calibrated. Once the ion current is measured, the vacuum degree for that tube type can be obtained by querying the ion current-vacuum degree curve for that tube type.


In conventional magnetic discharge testing of the vacuum degree of the arc extinguishing chamber, in order to improve the testing sensitivity, it is necessary to remove the arc extinguishing chamber from the circuit breaker and place it inside the solenoid coil. As a result, when reinstalling the arc extinguishing chamber into the circuit breaker, mechanical parameters need to be adjusted, which is labor-intensive and requires professional personnel. However, using a new type of magnetic coil can surround the arc extinguishing chamber from the side, so there is no need to disassemble the arc extinguishing chamber. By using a single-chip microcomputer for synchronous control and data acquisition and processing, the on-site testing sensitivity of the vacuum degree of the arc extinguishing chamber is improved.



2. No need to disassemble the vacuum switch during on-site measurement;


3. Test results are accurate and reliable;


4. LCD Chinese character display, making operation simpler and more convenient;


5. Can save, print, and view test data;


6. The instrument is equipped with an RS232 communication interface, which can be connected to a computer to achieve multiple functions such as downloading vacuum degree-ion current curves and life estimation;


7. The instrument is lightweight and easy to carry;



2. Measurement range: 10~10Pa;


3. Electric field voltage: 18kV;


4. Magnetic field voltage: 1600V;


5. Instrument accuracy: 5%;


6. Operating environment: -10℃~40℃;


7. Dimensions: 460mm×335mm×330mm.


8. Host weight: 12kg;



Note: The above information and technical parameters are compiled and released by Yangzhou Dary Electric Co., Ltd.

 

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