Six-channel SF6 density relay calibrator (WINFOSS-A26)

The six-channel SF6 density relay calibrator (WINFOSS-A26) is suitable for the calibration of various types of density relays. It is controlled by a high-performance single-chip microcomputer, with complete functions and easy operation. It is developed in strict accordance with national standards. Although the operation of the six-channel SF6 density relay calibrator (WINFOSS-A26) is simple, misoperation will cause accidents, reduce its performance, and shorten its service life. Use the instruction manual, master the correct use method and keep the instruction manual properly so that it can be used for a long time.

The Necessity of SF6 Density Relay Calibration

SF6 switches are high-voltage electrical appliances widely used in power systems. The reliable operation of SF6 switch has become one of the concerns of the power supply department. The SF6 gas density relay is an important component used to monitor the change of SF6 gas density in the SF6 switch body during operation, and its performance directly affects the operation safety of the SF6 switch. Due to the infrequent action of SF6 gas density relays operating on site, after a period of time, there are often inflexible movements and poor contact contact. Some of the density relays also have poor temperature compensation performance. When the ambient temperature changes, the density of SF6 is often caused. The relay malfunctioned. Therefore, DL/T596-1996 "Protection Test Regulations for Electric Power Equipment" stipulates that each SF6 switch user should regularly check the SF6 gas density relay. Judging from the actual operation situation, it is also very necessary to regularly check the SF6 density relay and pressure gauge in the field operation.

The basic principle of SF6 density relay verification
The gas pressure in the airtight container changes with the change of temperature. In order to facilitate statistics and comparison, the relative pressure value of SF6 at 20°C is usually used as the standard value. During on-site verification, the SF6 pressure value measured at a certain ambient temperature should be converted to its equivalent pressure value at 20 °C, so as to judge the performance of the density relay.

Latching recovery value verification: At ambient temperature, when the SF6 density relay is at zero pressure, slowly inflate the SF6 density relay at a certain speed, and when the latching contact of the SF6 density relay operates, record the pressure value at the current ambient temperature , and converted to the equivalent pressure value at 20°C, the equivalent pressure value at 20°C is the latching recovery value of the SF6 density relay.

Alarm response value verification: Continue to slowly inflate the SF6 density relay at a certain speed. When the alarm contact of the SF6 density relay operates, record the pressure value at the current ambient temperature and convert it into the equivalent pressure value at 20°C. The equivalent pressure value at 20°C is the alarm response value of the SF6 density relay.

Overpressure recovery value verification: slowly deflate the SF6 density relay at a certain speed. When the contact of the SF6 density relay moves, start to deflate the SF6 density relay slowly and uniformly. When the relay overvoltage alarm signal is issued, record The pressure value at the ambient temperature at that time is converted into the equivalent pressure value at 20°C. This equivalent pressure value is the overpressure recovery value of the SF6 density relay.

Alarm value verification: At ambient temperature, when the pressure in the SF6 density relay is greater than the alarm response value, the air is slowly released at a certain speed. When the alarm contact of the SF6 density relay is activated, the pressure value at the current ambient temperature is recorded. And converted into the equivalent pressure value at 20 ℃, the equivalent pressure value at 20 ℃ is the alarm value of the SF6 density relay.

Blocking value verification: Continue to slowly deflate the SF6 density relay at a certain speed. When the blocking contact of the SF6 density relay operates, record the pressure value at the current ambient temperature and convert it to the equivalent pressure value at 20°C. The equivalent pressure value at 20°C is the blocking value of the SF6 density relay.

Overpressure value verification: Continue to slowly inflate the SF6 density relay at a certain speed. When the overpressure contact of the SF6 density relay operates, record the pressure value at the ambient temperature at that time and convert it to the equivalent pressure value at 20°C , this equivalent pressure value is the overpressure value of the SF6 density relay.

Features of SF6 Density Relay Calibrator (WINFOSS-A26)
1. The calibration function of this model is divided into: "External Air Source Calibration" and "Internal Air Source Calibration".

2. External air source verification: The external air source supplies air, and the automatic test process is automatically completed by the equipment at a pressure of 0.001MPa.

3. Built-in gas source calibration: automatic gas pressure making mechanism, built-in pressure protection unit, and the output is always controlled at a pressure of about 1.1MPa through the pressure gauge display and pressure protection unit. Make the calibration fast, convenient, stable and reliable, so as to avoid the high labor intensity, unstable calibration pressure, and inaccurate calibration results caused by manual pressure methods such as hand cranking and pumping.

4. Fully automatic operating system, the entire calibration process does not require human intervention, under the step-by-step voltage stabilization state of 0.001MPa pulse width, the flow is automatically controlled, and automatic calibration is realized in intelligent judgment, and the calibration results are accurate and reliable. Avoid the poor repeatability of the calibration results caused by the unstable calibration pressure and flow caused by manual pressure adjustment and manual flow adjustment.

5. The calibration interface menu has options such as relay calibration, data browsing, resistance measurement, system setting, pressure zeroing, normal temperature pressure indication, 20 degree pressure indication, temperature indication, etc. It has three options for double locking and overpressure alarm. The verification of the density relay of the node can be completed at one time, avoiding the human error and misjudgment caused by the multi-level and step-by-step verification of the density relay with three pairs of points.

6. The WINFOSS-A26 density relay calibrator has a resistance measurement function, which can measure the contact resistance at the same time as the contact point.

7. The WINFOSS-A26 density relay calibrator can calibrate multiple SF6 density relays at the same time, and at most 2 SF6 density relays (Note: Customers need to select and configure).

8. In the calibration process, you can choose to complete the calibration once or automatically take the average value, which realizes the perfect combination of work efficiency and calibration accuracy.

9. It has the function of verifying the normal temperature pressure gauge within 1MPa, and the system automatically calculates the error result;

10. It has system self-checking function to ensure the accuracy of calibration.

11. It has system pressure self-correction function, which ensures the reliability of calibration accuracy.

12. The temperature acquisition of WINFOSS-A26 density relay calibrator is divided into two types: external acquisition and internal acquisition. The external acquisition is collected through a handheld infrared thermometer, and the temperature is collected into the temperature input device, and the CPU will automatically convert it into a 20°C pressure value. The internal collection is collected by PT100 and the temperature is sent to the CPU, and the conversion to P20 pressure value is automatically completed.

13 groups of signal lines can be plugged at will, and the device has the function of automatic identification of contacts. 

14. No constant temperature is required during the calibration process, and the SF6 gas density relay and pressure gauge can be calibrated within any valid temperature range. It automatically completes the pressure measurement and the conversion of 20 ℃ pressure value, realizes the dynamic automatic compensation between pressure and temperature, and completely solves the problem of difficult on-site verification of SF6 gas density relays.

15. Equipped with monochrome LCD screen, stainless steel keyboard, beautiful interface, simple operation, all parameters and status are clear at a glance.

16. The core gas path components, trachea, and quick connectors are imported brand-name products, with excellent performance and reliable work;

17. The instrument comes with a built-in high-performance lithium battery, and no external power supply is required for on-site calibration.

18. Equipped with various types of transition joints, the density relay of most types of switches can be checked on site without disassembly.

19. It can store multiple sets of verification results, and has the function of power-off data protection, which can query and print the stored verification results at any time.

20. The test results are printed in the Chinese character report form, and the test results are intelligently analyzed.

21. The test data is uploaded to the computer through the U disk, which can perform data storage, printing, query and other functions.

22. This product is a portable instrument with built-in battery and built-in gas source, which is easy to carry and reliable to use. It is an essential equipment for SF6 density relay calibration.

Chapter II Technical Specifications
1. Working temperature: -10℃～+60℃
2. Working voltage: AC220V 50Hz
3. Rated power: 160W
4. Instrument accuracy: 0.2 class (can be customized according to requirements)
5. Pressure display accuracy: 0.0001MPa
6. Pressure calibration range: 0～1.0MPa
7. Ambient temperature measurement range: -50℃～+99.9℃
8. Ambient temperature display resolution: 0.1℃
9. Display mode: 7-inch LCD screen
10. Air source: external air source and built-in air source
11. Operation mode: touch mode and stainless steel keyboard input
12. Printing method: Chinese character report printing
13. Storage capacity: about 800 sets of calibration data can be stored
14. Communication function: data can be uploaded to the computer
15. Dimensions: 540*340*336
16. Weight: 15.3Kg
17. Executive standard: Q/ZSO 002-2013
18. Type Approval Certificate No.: 2007F133-41