Various problems may occur in the design and installation of transformer, busbar and line differential protection. Therefore, it is particularly important to carry out a load test when the corresponding protection is put into operation. This article introduces the research status of virtual reality technology and the necessity of load test, puts forward the load test methods and precautions, and proposes a simulation plan combining virtual reality technology and load test.

In view of the aging and corrosion of temperature probe caused by environmental problems, the traditional replacement method has problems such as long time consumption and difficulty in replacement. It is proposed to make a temperature indicator controller temperature probe replacement tool, which can further improve work efficiency and reduce power failure overhaul time. And in view of the human error in the temperature test of the temperature indicating controller and the technical error caused by the collision of the thermal resistance, combined with the relevant conditions of the electrical laboratory, a multi-functional temperature test tool rack is designed to realize the auxiliary temperature indication controller test and reasonable storage of thermal resistance. Finally, a practical experiment is carried out on the tools and instruments developed, and the results show that the tools and instruments designed and developed in this paper are feasible and practical.

The intelligent insulation resistance meter realizes a verification device that can simultaneously verify the insulation resistance meter and ground resistance meter, which can provide the standard resistance value for the verification of insulation resistance meter and ground resistance meter. The automation of the verification device had been achieved by the intelligent insulation resistance meter. The resistance value could be automatically output after inputting the value of resistance by the keyboard, which reduces the time of manually adjusting the knob of resistance value. The original verification record and verification certificate will be generated automatically after verification. The application of wireless communication technology enables the wireless connection of computer, automatic resistance box and printer.

The performance of the circuit breaker mainly includes mechanical performance and arc extinguishing performance. This paper reviews the current status of its detection methods. Research indicates that the dynamic characteristic instrument method can meet the needs of offline detection for the detection of mechanical properties, but it cannot be implemented with electricity. The traditional method for detecting the degree of contact ablation is the electrical life method, which determines the change in the degree of contact ablation of the high-voltage reactive switching switch by the weighted calculation of the number of breaking and the breaking current. This method can only reflect the deterioration of the contact ablation degree of the high-voltage reactive switching switch, but it cannot reflect the abrupt or abnormal contact ablation degree deterioration. It is necessary to carry out research on new technology for live detection of circuit breaker performance.

In the traditional power equipment positioning system, to achieve tag positioning, the system needs servers, base stations, and tags. To ensure more stability of the system, it needs to range with four base stations during tag positioning. However, the system will have excessive power consumption, and the time to initiate ranging between multiple tags is random, which will cause serious data distortion. Therefore, to adjust the system with complex power equipment management, this paper proposes a low power label time-sharing location method. First, establishing an ultra-wideband UWB between the BTSs to synchronize the time of each BTS. Then, the tag just ranges with one of the BTSs, and the other BTSs get a receiving time. Finally, the time difference method is used to convert the distance between the tag and all other base stations, to reduce the power consumption of the system. The feasibility of the proposed method is verified by an example. This method can effectively solve the problem of multi-label location, which makes the power consumption of label location low and the location will not conflict, and has good engineering practical value.