Insulator zero-value detection is an effective method to determine whether the performance of an operating insulator meets the conditions for continued operation, to discover possible low-value insulators that have not yet been broken down, and to reduce the occurrence of sudden failures. Common insulator zero value detectors include insulator resistance testers, insulator distribution voltage testers, etc. So, how to choose one?

    1. Select according to the voltage level of the line being tested: Different models and categories of zero-value detector equipment have different performance and parameters. If you want to choose the appropriate equipment, the first step is to determine the voltage level of the line being tested. This is also the most basic step. Make sure that the insulator zero value detection equipment to be used can meet the various parameter requirements of the detection line. For example, for 35-500 kV insulator detection, you can choose the HB-RT20 insulator resistance tester and pass the resistance test method. For testing; if it is 500-1000 kV insulator testing, you can choose the HB-VD30 insulator distribution voltage tester to measure through the voltage distribution method;

    2. Judgment based on power outage or live testing requirements: At present, most insulator zero-value testing is performed with power on, but there are still some testing items that require power outage testing. Before selecting the corresponding testing equipment, it is important to confirm whether live testing is required;