Usage Two uses: (1) For the quality control of the arc extinguishing chamber in the vacuum interrupter production line, and for the inspection of the arc extinguishing chamber of the circuit breaker manufacturer. Strontium Acetate Formula,Chlormadinone Acetate,Strontium Acetate,Organic Chemical Strontium Acetate Vietnam Fine Chemical Factory , https://www.finechemvina.com
(2) It is used to detect the degree of vacuum of the vacuum interrupter installed in the switch machine. This type of inspection is mainly used in the routine maintenance and capacity testing of the power supply sector to determine the capacity of the vacuum interrupter.
Connect the magnetron current output terminal on the panel to the magnetron coil through the wire, make the interrupter contact point to the sub-state (the coil sleeve is in the arc extinguishing chamber), connect the high voltage line and the signal input line to the extinguishing chamber respectively. End and static end. Note that the high voltage line should be left open.
When measuring tube type selection, the tube type is selected first, and a variety of tube types have been stored in the instrument.
(1) Tube selection operation method Press [SELECT] to make [◢◢] point to the selected test tube type, press [ENTER], and use [+] or [-] key to adjust the tube type parameters. When the display shows the tube If the type is the same as the type code you want to measure, press [Enter] to return to the main menu. If the tube type to be measured is not given, the tube type with the same size and the same wiring method can be used instead.
(2) Measurement Press [Select] to [◢◢] to test vacuum tube “Paâ€, press [Enter] to measure the instrument. And automatically complete all the measurement, calculation, display and other whole process.
(3) Print If you want to print test data, press [Enter] to return to the main menu, press [Select] to enable [◢◢] to print test data, and then press [Print] to print out all measurement data.
(4) If there is no alternative parameter, press [Select] to point [◢◢] to “Aâ€, which can directly give the ionization current, generally speaking. The ionization current (A) is 2 orders of magnitude smaller than the vacuum (Pa).
The computer in the vacuum tester executes the measurement procedure to start the high voltage → leak current detection → automatically turn off the high voltage, turn on the charging switch → the voltage reaches the specified value → restarts the high voltage, starts the magnetron current, measures the leakage current + ionization leakage current → deducts the leakage current Current → current is converted to vacuum value → display, print. If [A key] is valid, the current value is displayed.
The vacuum tester adopts the method of starting the high pressure twice. If the high pressure is started for the first time and then returns to the initial state, the instrument is rejected for inspection at this time. Check whether the vacuum tube is in the closed state. If not, the tube has been seriously leaked or completely leaked.
Instructions for use The vacuum tester is an identification device for the vacuum degree of a vacuum interrupter. It uses a single-chip computer as the main control unit, and the testing process is completely automated. The instrument in principle changed the method of using current peaks for calibration of similar products at home and abroad, and uses ion charges for calibration. In this way, there is better accuracy on the physical principle, and the interference of the pulsed power supply during the test is effectively suppressed, making the test stable and reliable. The instrument uses two sampling methods to deduct the leakage power generated due to environmental factors, the accurate measurement of the vacuum interrupter on the machine. The measurement standard curve of 26 vacuum interrupters has been stored in the instrument, covering most of the domestic and foreign tube types.
Test principle Vacuum switch vacuum tester uses magnetron discharge method to measure. Pull the two contacts of the arc extinguishing chamber of the vacuum switch to a certain distance, apply the electric field pulse high voltage, place the arc extinguishing chamber in the solenoid coil or place the new type electromagnetic coil on the outdoor side of the arc extinguishing chamber, and pass a large current to the coil. Thus, a pulsed magnetic field synchronized with high voltage is generated in the arc extinguishing chamber. In this way, under the action of a strong magnetic field and a strong electric field, the charged ions in the arc extinguishing chamber move spirally and collide with the residual gas molecules. The resulting ion current is approximately proportional to the residual gas density, that is, the degree of vacuum. For different vacuum tube models (tube type), because of their different structures, the ion currents are not the same size under the same contact distance, the same degree of vacuum, and the same electric field and magnetic field conditions. Through the experiment can be calibrated a variety of pipe vacuum degree and ion current correspondence curve. After measuring the ion current, the degree of vacuum of the tube can be obtained by querying the ion current-vacuum curve of the tube type.
When the conventional magnetron discharge tests the degree of vacuum in the interrupter, in order to increase its test sensitivity, the arc extinguishing chamber needs to be removed from the circuit breaker and placed in the solenoid line pipe. As a result, the arc extinguishers need to adjust the mechanical parameters when reinstalling the circuit breaker. The workload is large and requires professionals. With the new magnetron coil, the arc extinguishing chamber can be surrounded from the side, so that it is not necessary to disassemble the arc extinguishing chamber. The use of a single-chip microcomputer for synchronous control and data acquisition and processing improves the on-site test sensitivity of the arc-extinguishing chamber vacuum.
Switching vacuum tester using method