Zero value detection of insulators is an effective method to determine whether the performance of insulators in operation meets the conditions for continued operation, identify potential low value insulators that have not yet been broken down, and reduce the occurrence of sudden faults. Common insulator zero value detectors include insulator resistance testers, insulator distribution voltage testers, etc. So, how should we choose the type?

1、 Select zero value detection equipment based on the voltage level of the tested line: different models and categories of zero value detection equipment have different performance and parameters. To choose a suitable equipment, the first step is to determine the voltage level of the tested line, which is also the most basic step to ensure that the insulator zero value detection equipment to be used can meet the various parameter requirements of the detection line, such as 35-500 kV insulator detection, You can choose the HB-RT20 insulator resistance tester for testing through the resistance testing method; If it is an insulator detection of 500-1000 kV, the HB-VD30 insulator distribution voltage tester can be selected for measurement using the voltage distribution method;

2、 Based on the requirements for power outage or live detection, it is important to confirm whether live detection is necessary before selecting the corresponding detection equipment. Currently, most insulator zero value detection is carried out with power, but there are still some detection items that require power outage detection;