Development of split current transformer

The development of split current transformers has been rapid, and the power industry is particularly important for the development of split current transformers. This is especially true for the accuracy of split current transformers.

There are many types of split current transformers that we usually come into contact with. The split current transformers produced by Hemei Electronics include split current transformers, power extraction split current transformers, high-frequency split current transformers, zero-sequence split current transformers, and so on. However, in the power industry, the split current transformers used must be consistent with the use of the power system, and split current transformers with corresponding voltage levels and accuracy must be developed to meet the needs of power system measurement, maintenance and control. Therefore, with the development of science and technology and the application of new materials, the performance of split current transformers is getting better and better, and there are more and more types.

Split current transformers are adapted to the development needs of power construction with a variety of structures such as dry, oil-immersed and gas-insulated. However, with the continuous growth of power transmission capacity, the continuous improvement of grid voltage level and the continuous improvement of maintenance requirements, the general core-type split-type current transformer structure has gradually exposed its weaknesses that are not accustomed to it. Its inherent large size, magnetic saturation, ferromagnetic resonance, small dynamic range and many other shortcomings cannot meet the application requirements of the new generation of power system automation and power digital network, so it is necessary to continuously promote the development of the industry.

Split-type current transformer is an important equipment for power metering, current measurement and microcomputer protection in the power system. Generally, the primary winding of the split-type current transformer is connected in series in the power line during use, and the secondary winding is connected to the measuring instrument, microcomputer protection and automatic control device. Since the traditional split-type current transformer is connected in series in the equipment during the application of the substation, it is directly embedded in different circuits during the initial installation, and the electrical connection of the substation is a hard connection. Therefore, once the split-type current transformer needs to be repaired or replaced, it is necessary to dismantle it from the connection point, which is very inconvenient to maintain. However, the open-type split-type current transformer can be installed and disassembled under power, which is simple to install and maintain. Therefore, the open-type split-type current transformer will be a development direction of current measurement technology.