The vacuum switch vacuum degree tester launched by Yangzhou Topu Electric Technology Co., Ltd. is an upgraded and improved vacuum degree detection instrument. This device has the characteristics of better stability, higher intelligence, and higher testing accuracy.

The commonly used method for determining whether the vacuum degree of a vacuum circuit breaker has deteriorated is the power frequency withstand voltage method, which can only determine the arc extinguishing chamber with severe vacuum degree deterioration. When the vacuum degree deteriorates to 10-2-10-1 Pa, although the breakdown voltage does not decrease, the arc extinguishing chamber is no longer qualified. This vacuum degree tester uses an excitation coil and magnetic discharge method to test the vacuum degree of the arc extinguishing chamber without disassembling the chamber. Simultaneously using a microcomputer for synchronous control and data acquisition processing, the sensitivity of on-site testing of the vacuum degree in the arc extinguishing chamber reached 10-5Pa.

The outstanding feature of this vacuum switch vacuum degree tester is the use of a new excitation coil and data processing method, which achieves non disassembly measurement of vacuum degree. This instrument has the characteristics of easy use, simple operation, and non disassembly measurement. It is a practical detection instrument widely used in departments such as power, steel, railway, coal, textile, etc. that use vacuum switches.

working principle

Pull apart the two contacts of the arc extinguishing chamber by a certain distance and apply pulse high voltage; Place the arc extinguishing chamber inside the spiral coil or place the new electromagnetic coil outside the arc extinguishing chamber, apply magnetic field voltage to the coil, and generate a pulse magnetic field synchronized with high voltage inside the arc extinguishing chamber. Under the action of pulsed magnetic field and strong electric field, electrons in the arc extinguishing chamber undergo spiral motion and collide with residual gas molecules for ionization. The resulting ion current is proportional to the density of the residual gas (i.e. vacuum degree value). For different types of vacuum tubes (tube types), due to their different structures, the magnitude of ion current varies under the same contact distance, vacuum degree, electric and magnetic fields. The corresponding relationship curve between the vacuum degree of various tube types and the ion power source can be calibrated through experiments. After measuring the ion current, the vacuum degree of the tube type can be obtained by querying the ion current vacuum degree curve of the tube type.

When testing the vacuum degree of the arc extinguishing chamber using conventional magnetron discharge method, in order to improve the testing sensitivity, the arc extinguishing chamber needs to be removed from the circuit breaker and placed inside the spiral tube coil. In this way, when reinstalling the arc extinguishing chamber onto the circuit breaker device, it is necessary to readjust the mechanical parameters, which requires a large amount of work and professional expertise. The use of 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. Simultaneously using a single-chip microcomputer for synchronous control and data acquisition processing has improved the sensitivity of on-site testing of the vacuum degree in the arc extinguishing chamber.

Technical Specifications

1. Test object: Various types of vacuum switch tubes

2. Detection method: Non disassembly measurement of vacuum tube using excitation coil

3. Scope of application: This instrument is a multi-purpose type that can measure multiple types of vacuum switches

4. Detection range: 10-5 to 10-1 Pa

5. Measurement accuracy: 10-5 to 10-4 Pa, 10%

10-4～10-3 Pa，10%

10-3～10-2 Pa，10%

10-2～10-1 Pa，10%

6. Magnetic field voltage: 1700V

7. Pulse electric field high voltage: 30kV

8. Switch tube opening distance during vacuum testing: normal use opening distance

9. Operating environment: -20 ℃ to 40 ℃

10. Sampler: Magnetron coil

Top Electric's main equipment:

Complete set of equipment for frequency conversion series resonance test, DC high voltage generator, SF6 gas micro water meter, SF6 gas leak detector, SF6 gas purity tester, SF6 gas comprehensive tester SF6 density relay calibrator, test transformer (power frequency withstand voltage test device), frequency conversion anti-interference high voltage dielectric loss tester, triple frequency generator (induction withstand voltage test device), double frequency generator set, AC/DC voltage divider (high voltage measuring instrument), high current generator (current converter), transformer DC resistance tester, transformer ratio tester, transformer capacity characteristic tester, transformer no-load short circuit tester, transformer on load tap changer tester, transformer winding deformation tester, transformer characteristic comprehensive testing platform, transformer core grounding current tester, microcomputer relay protection tester, transformer characteristic comprehensive tester (transformer volt ampere characteristic tester), high-voltage switch mechanical characteristic tester (circuit breaker characteristic tester), circuit resistance tester Tester (contact resistance tester) Zinc oxide lightning arrester tester, transmission line parameter tester, capacitance and inductance tester, grounding resistance tester, insulation resistance tester (megohmmeter), insulation oil dielectric strength tester (insulation oil withstand voltage tester), insulation oil chromatograph, insulation boot (glove) withstand voltage test device, power safety tool testing equipment, battery constant current discharge tester, mining cable fault tester, mining power detection equipment, oil analysis instrument, subway system power detection equipment, intelligent solar photovoltaic junction box tester, vacuum oil filter, electric heating appliance, insulation products, etc.

Information organization: Yangzhou Topu Electric Technology Co., Ltd