SF6 relay plays a crucial role in power equipment as they are used to monitor the density of SF6 gas to ensure the normal operation of the equipment. Regular testing and calibration are necessary to ensure the accuracy and reliability of density relays. When conducting SF6 relay tester experiments, there are some important precautions to be taken into account to ensure the effectiveness and safety of the tests.
Safety is always the top priority when conducting SF6 relay testing. Here are some safety considerations that must be adhered to before conducting the experiment:
Power Disconnection and Disconnecting Connections: Before calibrating a SF6 relay, it is essential to disconnect the power and devices connected to the relay. This avoids the risk of electric shock or equipment damage.
Temperature Matching: If the ambient temperature of the density relay differs from the temperature of the calibration device, ensure that they are tested at the same temperature for accurate calibration.
Disconnecting Signal Lines: Ensure that the alarm signal lines and lockout signal lines are disconnected from the terminal block to avoid any secondary circuits or circuits formed by signal lines that may affect the calibration results.
When conducting SF6 relay testing, attention should be paid to the following parameters:
Pressure Range: Ensure that the pressure range of the SF6 relay tester is suitable for the relay being tested. Typically, this range is between 0 and 1.0MPa.
Temperature Range: Check the temperature range of the calibration device to ensure that it can handle the temperature range of the SF6 relay. The temperature testing range of the calibration device is usually between -40℃ and 125℃.
Calibration Object: Determine the type of SF6 relay to be calibrated, such as single alarm, single lockout, single alarm and lockout, or single alarm and double lockout.
During the testing of the SF6 relay tester, attention to detail is crucial. Here are some specific points to note:
Relay Positioning: The density relay being calibrated must be positioned upright and should not be laid flat to ensure the accuracy of the calibration.
Exhaust Handling: After completing the test, it is imperative to purge any residual gas in the pipeline and then remove the gas pipe to prevent gas leaks.
Avoidance of Quick Exhaust Port: The quick exhaust port should not be used during the testing process to prevent wastage of gas in the air source.
Vibration: Vibration generation is strictly prohibited during the calibration of SF6 relays to ensure the accuracy of the calibration.
Storage and Transportation Conditions: The calibration device is a precision electronic product and should be stored in an environment with a temperature between -20°C and 70°C, a relative humidity not exceeding 90%, and free from gases that may cause corrosion.
Transportation Safety: During the transportation of the calibration device, avoid severe vibrations and impacts to prevent exposure to rain or snow.
By adhering to the above precautions, the testing of the SF6 relay tester can proceed smoothly, enhancing the reliability and accuracy of density relays. This, in turn, contributes to ensuring the safety and normal operation of electrical equipment. Density relays hold a significant position in the power industry, making regular testing and calibration crucial.