Technical Information
What are the testing items for surge suppression varistors?
[ 11-07-2024 ]
The Surge suppression type varistor detection cover many aspects to ensure that their performance and quality meet relevant standards and requirements. Here are some of the main test items:
1. Appearance and size inspection
Appearance inspection: Check whether the surface of the varistor has defects such as cracks, stains, damage, etc.
Size inspection: Measure the size of the varistor to ensure that it meets the specification requirements.
2. Electrical performance test
Voltage or leakage current detection: Measure the current flowing through the varistor, that is, the leakage current, at the specified temperature and maximum DC voltage.
Limiting voltage detection: Apply a lightning current pulse current with a waveform of 8/20μs to the varistor and measure the peak value of its limiting voltage.
Varistor voltage detection: Measure the voltage value of the varistor at a specific current, that is, the varistor voltage.
Capacitance detection: Applicable to full-performance experiments, measure the capacitance of the varistor.
Insulation resistance detection: Measure the resistance value between the lead wire (pin) of the varistor and the insulating surface of the resistor body.
3. Surge impact test
Voltage test under pulse conditions: Use common mode and differential mode test levels to perform voltage tests on the varistor under pulse conditions to evaluate its performance under surge impact.
4. Other performance tests
Current impact stability: The varistor should be able to withstand a certain number of pulse current impacts and maintain its stable performance.
Limit impact current tolerance: Test the impact current tolerance of the varistor under extreme conditions.
Continuous voltage stability: Evaluate the continuous voltage stability of the varistor under the application of the maximum continuous AC voltage.
5. Safety performance test
Insulation package withstands voltage: Test the withstand voltage of the varistor insulation package to ensure its safety during use.
6. Environmental and mechanical performance test
High-temperature storage, low-temperature storage test: Evaluate the performance stability of the varistor under different temperature environments.
High temperature and high humidity test: Test the performance changes of the varistor under a high temperature and high humidity environment.
Salt spray test: Evaluate the corrosion resistance of the varistor in a salt spray environment.
Mechanical performance test: Conduct terminal strength, impact test, and vibration test to evaluate the mechanical properties of the varistor.
In summary, the testing items for surge suppression varistors cover appearance, size, electrical performance, surge impact, other performance, safety performance, environmental and mechanical performance, etc. These testing items are designed to ensure that the performance and quality of the varistor meet relevant standards and requirements, thereby ensuring its reliability and stability in various application scenarios.
1. Appearance and size inspection
Appearance inspection: Check whether the surface of the varistor has defects such as cracks, stains, damage, etc.
Size inspection: Measure the size of the varistor to ensure that it meets the specification requirements.
2. Electrical performance test
Voltage or leakage current detection: Measure the current flowing through the varistor, that is, the leakage current, at the specified temperature and maximum DC voltage.
Limiting voltage detection: Apply a lightning current pulse current with a waveform of 8/20μs to the varistor and measure the peak value of its limiting voltage.
Varistor voltage detection: Measure the voltage value of the varistor at a specific current, that is, the varistor voltage.
Capacitance detection: Applicable to full-performance experiments, measure the capacitance of the varistor.
Insulation resistance detection: Measure the resistance value between the lead wire (pin) of the varistor and the insulating surface of the resistor body.
3. Surge impact test
Voltage test under pulse conditions: Use common mode and differential mode test levels to perform voltage tests on the varistor under pulse conditions to evaluate its performance under surge impact.
4. Other performance tests
Current impact stability: The varistor should be able to withstand a certain number of pulse current impacts and maintain its stable performance.
Limit impact current tolerance: Test the impact current tolerance of the varistor under extreme conditions.
Continuous voltage stability: Evaluate the continuous voltage stability of the varistor under the application of the maximum continuous AC voltage.
5. Safety performance test
Insulation package withstands voltage: Test the withstand voltage of the varistor insulation package to ensure its safety during use.
6. Environmental and mechanical performance test
High-temperature storage, low-temperature storage test: Evaluate the performance stability of the varistor under different temperature environments.
High temperature and high humidity test: Test the performance changes of the varistor under a high temperature and high humidity environment.
Salt spray test: Evaluate the corrosion resistance of the varistor in a salt spray environment.
Mechanical performance test: Conduct terminal strength, impact test, and vibration test to evaluate the mechanical properties of the varistor.
In summary, the testing items for surge suppression varistors cover appearance, size, electrical performance, surge impact, other performance, safety performance, environmental and mechanical performance, etc. These testing items are designed to ensure that the performance and quality of the varistor meet relevant standards and requirements, thereby ensuring its reliability and stability in various application scenarios.