As the world’s largest consumer of new energy electric vehicles, new energy electric vehicles are developing rapidly, and the safety of electric vehicle charging piles is a top priority: whether the electric vehicle charging pile can avoid random plugging and unplugging during the charging process. The accident caused by the charging gun, whether it can…
The extensive application of nonlinear loads in power grids brings a series of problems harmonic wave. The main hazards of harmonic wave include: Increase the load of power facilities, reduce the power factor of the system, reduce the effective capacity and efficiency of power generation, transmission and electrical equipment, resulting in equipment waste, line waste and power loss;…
1. Residual current transformer wiring Before installing the residual current transformer, it is necessary to identify the phase line, N line and PE line in the power network. The phase line and the N line should pass through the residual current transformer together as much as possible, and the PE line should not pass through the…
Ferrite is a material that is relatively cheap in magnetic materials, and has good magnetic permeability and magnetic saturation strength, so it is now used in many current transformers, and in open-close current transformers, it is often based on customers. Therefore, we choose ferrites of different materials, such as PC40 and high-conductivity ferrite. We know that…
The current transformer is an instrument and equipment that converts a large current on the primary side into a small current on the secondary side for accurate measurement according to the basic principle of the magnetic effect of current. It is mainly composed of a closed iron core and windings. Its primary side winding has a very…
Preventive testing is an important link in the operation and maintenance of power equipment, and it is one of the effective solutions to ensure the safe operation of power equipment. In order to better ensure that various technical indicators of voltage transformers meet the standards, power engineering construction companies will carry out preventive tests on…
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