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  • When does magnetizing inrush current occur in transformers?
    When does magnetizing inrush current occur in transformers?
    01 Inrush currentWhen a transformer is first energized, a phenomenon called magnetizing inrush occurs. Although inrush currents are generally not as disruptive as fault currents, the duration of magnetizing inrush currents is on the order of seconds (compared to periods with fault currents).
  • Troubleshooting of abnormal phenomena in transformers
    Troubleshooting of abnormal phenomena in transformers
    Analysis of abnormal operation of transformersTransformer sound is abnormalAs soon as the transformer is connected to the power supply, there will be a buzzing sound, which is mainly due to the effect of high-voltage magnetic flux. During normal operation, the sound of the transformer is uniform. When there are other noises, you should carefully find the cause and deal with it.
  • The principle, structure and operation and maintenance of transformer gas protection
    The principle, structure and operation and maintenance of transformer gas protection
    Gas protection is the main protection for transformer internal faults. It can act sensitively to transformer inter-turn and inter-layer short circuits, iron core faults, internal bushing faults, internal winding disconnection, insulation deterioration and oil level drop. When a fault occurs inside the oil-immersed transformer, the arc will decompose the insulating material and generate a large amount of gas, which flows from the oil tank to the oil pillow, and its intensity varies with the severity of the fault, reflecting the air flow and oil flow The action protection is called gas protection, also called gas protection. During the operation of the transformer, due to internal faults, sometimes we cannot identify and take measures in time, which is easy to cause some accidents. After the protection of the gas relay, the occurrence of similar incidents can be avoided to a certain extent.
  • How to judge and deal with these abnormal phenomena in transformers?
    How to judge and deal with these abnormal phenomena in transformers?
    1. Analysis of abnormal operation of transformers(1) The sound of the transformer is abnormalAs soon as the transformer is connected to the power supply, there will be a buzzing sound, which is mainly due to the effect of high-voltage magnetic flux. During normal operation, the sound of the transformer is uniform. When there are other noises, you should carefully find the cause and deal with it.
  • Power Transformer Basics
    Power Transformer Basics
    1. Classification and models of power transformers2. 1. Classification by use3. (1) Step-up transformer: used by the power plant to transmit electricity to the outside.4. (2) Step-down transformer: The substation of the power supply bureau is used for voltage conversion.5. (3) Distribution transformer: used to supply power to users.6. (4) Plant transformer: Provides internal electricity for the power plant.7. (5) Transformer for station: Provide internal electricity for the substation.8. (6) Converter transformer: for DC power transmission, one side is connected to AC power, and one side is connected to the converter valve.9. (7) Rectifier transformer: used in thermal power plants to supply power to electrostatic precipitators.
  • About transformers, you have to master the knowledge points!
    About transformers, you have to master the knowledge points!
    1. What is a transformer?In the AC circuit, the device that increases or decreases the voltage is called a transformer. The transformer can convert any value of voltage into the voltage value we need with the same frequency to meet the requirements of electric energy transmission, distribution and use.For example, the electricity from a power plant has a low voltage level, and the voltage must be increased before it can be transported to a distant power consumption area. The power consumption area must be reduced to a suitable voltage level to supply power equipment and daily electricity. Equipment.
  • The harm of transformer oil seepage and its treatment methods
    The harm of transformer oil seepage and its treatment methods
    1. The oil leakage of the transformer will not only seriously affect the appearance, but also cause economic losses because the transformer needs to be shut down to eliminate leakage. If there are many oil stains on the ground foundation of the transformer, it may also become a fire hazard.
  • Measures to improve the short-circuit resistance of power transformers
    Measures to improve the short-circuit resistance of power transformers
    The power transformer is the hub of transmission and distribution of electric energy, and the core component of the power grid. Its reliable operation is not only related to the power quality of the majority of users, but also to the safety of the entire system. The reliability of a power transformer is determined by its health status, not only depends on the design and manufacture, structural materials, but also closely related to the overhaul and maintenance. The problem of improving the short-circuit resistance of transformers in power systems is discussed.
  • The most complete explanation of transformer cooling system
    The most complete explanation of transformer cooling system
    The cooling system of the power transformer consists of two parts: the internal cooling system, which ensures that the heat of the winding and the iron core is dissipated into the surrounding medium; the external cooling system, which ensures that the heat in the medium is dissipated to the outside of the transformer. According to the size of the transformer capacity, the medium and the type of circulation, the transformer adopts different cooling methods.
  • Must see! A comprehensive explanation of the composition, structure, oil system and fault operation and maintenance
    Must see! A comprehensive explanation of the composition, structure, oil system and fault operation and maintenance
    Oil-immersed transformers have the characteristics of good heat dissipation, low loss, large capacity and low price. At present, most of the power transformers running on the grid are oil-immersed transformers, of which more than 80% are cooled by natural oil circulation. It is a commonly used cooling structure to set a guide plate in the coil of a natural oil circulation transformer. This paper focuses on analyzing the structure, operation and maintenance of oil-immersed power transformers, and specifically analyzes the oil system of oil-immersed power transformers, and briefly analyzes the faults of oil-immersed power transformers. Hope to increase understanding and analysis of my country's oil-immersed power transformers.
  • When the transformer core is stacked, what are the seam methods? When the transformer core is stacked, what are the seam
    When the transformer core is stacked, what are the seam methods? When the transformer core is stacked, what are the seam
    When the transformer core is stacked, what are the seam methods? What are the characteristics of each? This article starts from the popular science of iron cores, and expands and expands to check the seam method of silicon steel sheets when the transformer iron cores are stacked. (If there are any mistakes or additions, please leave a message at the end of the article)
  • How much KW power consumption can a 1000KVA transformer withstand?
    How much KW power consumption can a 1000KVA transformer withstand?
    Question:"There is an old-fashioned transformer of 1000KVA with an existing load of about 200KW. If a new load of about 600KW is to be added, can this transformer withstand it?" 
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