DL/T 976-XX is a standard in the Chinese power industry, which involves preventive test methods for power safety tools and equipment. This standard particularly focuses on the periodic inspection and testing of power safety tools to ensure their safety and reliability during use. For insulating boots, the relevant sections in DL/T 976-XX provide specific test methods and requirements. Below is an overview of the insulating boot withstand voltage test based on this standard:
Standard Name
DL/T 976-2017 "Preventive Test Procedure for Insulating Tools and Equipment Used in Live Working"
Scope of Application
This standard applies to the preventive testing of personal protective equipment such as insulating gloves and insulating boots used in the power system.
Insulating Boot Withstand Voltage Test
Test Purpose
Confirm whether the insulation performance of the insulating boots meets the requirements for use.
Check whether the insulating boots have any damage or aging phenomena.
Test Equipment
High-voltage generator
Dedicated test water tank
Insulation resistance tester
AC milliammeter
Test Method
Preparation Stage:
Clean the insulating boots and remove surface dirt.
Prepare the test water, and if necessary, add a conductive agent to increase the conductivity of the water.
Water Tank Preparation:
Use a water tank made of non-conductive material or ensure that the metal water tank is insulated from the ground.
Add enough water to the tank to ensure that the insulating boots are completely immersed in the water.
Test Process:
Place the insulating boots in the water tank, ensuring that the inside is also filled with water.
Use a high-voltage generator to apply the specified voltage (generally 15kV) for a duration of 1 minute.
Observe whether there is any current leakage or insulation breakdown.
Record the leakage current values during the test.
Test Requirements
The leakage current should not exceed the specified limit (for example, for insulating boots, generally not more than 10mA).
During the test, there should be no spark discharge, flashover, or breakdown phenomena.
Precautions
The test should be conducted under the guidance of professionals.
Carefully inspect the condition of the insulating boots before and after the test.
After the test, the insulating boots should be thoroughly dried before storage.
Conclusion
Through the above test method, it is possible to effectively evaluate whether the insulation performance of the insulating boots meets the requirements of DL/T 976-2017. If the insulating boots fail the test, they should be immediately taken out of service and replaced.
Please note that the specific test voltage and time may vary depending on the type of insulating boots and usage conditions, so it is recommended to refer to the latest standard document for testing. If you need more detailed information or a specific version of the standard, please let me know, and I will do my best to provide assistance.
