Three phase oil immersed type In daily operation, power transformer manufacturers deal with non operation safety production accidents of high-frequency three-phase oil immersed power transformers, and find the essence of difficulties through inspection. When three-phase oil immersed power transformer is used When the voltage transformer stops running suddenly, the high and low voltage sides will be injured by large current. In the short time when the high-voltage disconnector has no time to break, the effect of the induced current generated by the current in direct proportion to the total electrical flow square meters is divided into radial force and axial force on the three-phase oil immersed power transformer.
When not in operation, the radial force acting on it will make the high pressure bear the tensile force and the low pressure bear the capacity. The axial force caused by the sudden non operation process causes the bearing force of the transmission line, resulting in how many offsets. The axial force also acts on the transformer coil and cable branching device. Therefore, when the three-phase oil immersed power transformer has a sudden short circuit fault, the low voltage and balance deformation will follow one after another, which means that the high voltage transformer, the high voltage transformer, the high voltage transformer, the high voltage transformer, the high voltage transformer, the high voltage transformer, the high voltage transformer, the high voltage transformer, the high voltage transformer, the high voltage transformer, the high voltage transformer, the high voltage transformer. After the short circuit fault accident of three-phase oil immersed power transformer, in addition to checking the main line, core, cable branch and other parts, the manufacturer of three-phase oil immersed power transformer reminds everyone to pay attention to a series of related problems in handling methods.
When the high-frequency three-phase oil immersed power transformer is not in operation, the winding resistance is subjected to various forces, such as reduction, stretching, bending, etc. Under the action of electric power, common problems are hidden and cannot be maintained and repaired regularly. Therefore, it is essential to check the condition of the cable after there are no common problems.
In addition, according to the measured value of DC resistance of three-phase oil immersed power transformer, the unbalance rate of DC resistance of winding resistance can be checked and compared with the previous measured value, so that the damage of transmission line of three-phase oil immersed power transformer can be reasonably investigated. For example, after the safety production accident of a three-phase oil immersed power transformer short-circuit fault, the C-to-DC resistance at the low-voltage side increased by about 10 points, and it is very likely that the cable will have a newly listed stock. Hanging wire inspection found that the zero wire of C live wire was cracked.
The transmission line capacitor is composed of winding resistance turn to turn capacitor, solid layer capacitor, cake capacitor and winding resistance generation capacitor. There is a certain gap between them. When the transmission line is deformed, it will generally be bent into an "S" shape, resulting in a smaller gap between the winding resistance and the iron core, and a larger capacitor between the winding resistance and the ground. The smaller the gap is, the more the capacitor changes. Therefore, the resistor of the transmission line of high-frequency three-phase oil immersed power transformer can intermittently reflect the deformation level of the transmission line.
HENGFENGSHUAI ELECTRIC, is an electrical enterprise with transmission and distribution industry as its main business, integrating product research and development, manufacturing and trade. Designated suppliers for the world's top 500 enterprises .Its main products include power transformers, medium and low voltage switchgear, distribution panel ,circuit breakers, transmission tower ,Cable and other power distribution equipment .The group has five department: Transformer department, Panel department, power transmission tower department, cable department and electrical engineering department. HENGFENGSHUAI ELECTRIC, has been working hard to provide the best transmission, distribution solutions for users all over the world.【WhatsApp：+86158 5325 2696（Jack） +86158 5326 5269（Alisa）hfs@hengfengshuai.com https://www.hengfengshuai.com 】
