24/01/22

Layout requirements of dry-type transformer

Dry-type transformer factory is an important place for the production of dry-type transformers. Dry-type transformer layout is an important kind of dry-type transformer production should pay attention to the problem, dry-type transformer layout is also a lot of knowledge, dry-type transformer layout should pay attention to what:

24/01/22

Whether the power transformer has radiation to the human body

Whether power transformers have radiation to the human body, we must first clarify a concept to the general public: in the field of electromagnetic environment and public health, transformers and other power transmission and transformation facilities produce "electric field", "magnetic field", "electromagnetic field", not "Electromagnetic radiation". "Electromagnetic radiation" is a special engineering term in the field of radio communication engineering and electromagnetic compatibility. It refers to the phenomenon that energy is emitted from a source to space in the form of electromagnetic waves, or refers to the propagation of energy in space in the form of electromagnetic waves. It is not appropriate to quote "electromagnetic radiation" as an environmental impact factor in the field of electromagnetic field environmental health. Power transmission and transformation facilities use equipment as the carrier for energy transmission, rather than "electromagnetic waves" for energy transmission. Around the transmission and transformation facilities, "electric field", "magnetic field" and "electromagnetic field" are generated ".

24/01/22

Zero line connection of dry-type transformer

Dry-type transformers generally have two lines, one is the live line of dry-type transformers, and the other is the neutral line of dry-type transformers. These are important lines of dry-type transformers. Dry-type transformer has an important line is the neutral line of dry-type transformer, it is an important line. So dry-type transformer zero line is how to connect it, or dry-type transformer factory small make up a detailed understanding of it:

24/01/22

Six ways to protect the power transformer you know several

First of all, the * * * types are: gas maintenance: oil-immersed transformers with a capacity of 800k V.A and above shall be equipped with gas maintenance as the main maintenance for internal faults and oil level drop in transformer oil tank.

24/01/22

Factory Requirements for Power Transformers

In addition to the factory test, the new power transformer shall be subject to on-site hanging core inspection before the installation is completed and put into operation;

24/01/22

How to see the current of dry type transformer

According to the calculation formula, dry-type transformer current: I = S/(root number 3 * U)0/0.4KV dry-type transformer rated current calculation primary side similar 0.058 * KVA (dry-type transformer volume, specification model 10kV/0.4kV) secondary side similar 1.44 * KVA (dry-type transformer volume, specification model 10kV/0.4kV) subtitle response to the following calculation 50KVA dry-type transformer low voltage side rated current: 50*1.44 = 72A to calculate the rated current on the low voltage side of 80KVA dry-type transformer: 80*1.44 = 115.2A to calculate the rated current on the low voltage side of 100KVA dry-type transformer: 100*1.44 = 144A or so is the requirement for the calculation of the current and the current of dry-type transformer that people have introduced in detail to everyone for reference. In fact, the application of dry-type transformer is the key and the advantages of dry-type transformer should be shown, promote the safe and stable operation of dry-type transformers. According to the calculation formula, dry-type transformer current: I = S/(root number 3 * U)0/0.4KV dry-type transformer rated current calculation primary side similar 0.058 * KVA (dry-type transformer volume, specification model 10kV/0.4kV) secondary side similar 1.44 * KVA (dry-type transformer volume, specification model 10kV/0.4kV) subtitle response to the following calculation 50KVA dry-type transformer low voltage side rated current: 50*1.44 = 72A to calculate the rated current on the low voltage side of 80KVA dry-type transformer: 80*1.44 = 115.2A to calculate the rated current on the low voltage side of 100KVA dry-type transformer: 100*1.44 = 144A or so is the requirement for the calculation of the current and the current of dry-type transformer that people have introduced in detail to everyone for reference. In fact, the application of dry-type transformer is the key and the advantages of dry-type transformer should be shown, promote the safe and stable operation of dry-type transformers.

24/01/22

Fault Diagnosis Method of Oil-immersed Transformer

As the core component of the power grid, the power transformer plays an important role in the energy transmission and conversion of the power grid. If the transformer power failure, it will have a great impact on the quality of automatic equipment and products. Therefore, the author takes the oil-immersed transformer as the research object, and determines the operating state and internal fault of the transformer according to the type and content of dissolved gas in the oil under different operating conditions. Then a classified deep forest network model is established, and a new transformer fault diagnosis method is proposed based on the on-line monitoring data of power transformer oil chromatography and dissolved gas analysis data. Later, the fault diagnosis results of three comparative methods, BP neural network method and deep forest model are compared to verify the feasibility of the method proposed by the author.

24/01/22

Common structure of dry-type transformer shell

Dry-type transformers are widely used in substations, industrial and mining enterprises, hospitals, residential areas and other occasions because of their advantages of fire prevention, safety, reliability, energy saving, maintenance-free, low loss, low noise, long life, small size, light weight and so on. It has two main forms: epoxy resin insulation (abbreviated as ORDT) and paint impregnated non-sealed (abbreviated as OVDT). The former has mechanical strength and short circuit resistance, moisture, dust, corrosion resistance. After the end of life, only deep buried. The latter has good insulation pressure resistance, heat resistance and flame retardancy. The insulation class can reach H level. After the end of life, biodegradable recycling. Dry-type transformers are usually equipped with a housing. Its shell material, structure, in and out of the line, sealing heat dissipation, basic form, etc. are important factors that must be considered in the design of dry-type transformer shell.

24/01/22

Setting of box-type transformer box door lock

The theft of box-type transformer control facilities has always been a serious safety prevention problem in the maintenance of box-type transformers. Box-type transformers are the key supporting equipment on power transmission and distribution lines, because most of them are located along the highway pavement and at the junction of suburbs, with a wide distribution range and difficult protection. The criminal suspect uses various unlocking techniques to enter the transformer box transformer controller, and the theft of communication facilities such as transformer box transformer controller has long become a common problem of security prevention in many areas, which not only causes serious economic losses to the company, but also causes serious harm to the daily life of the masses. It has become a major hidden danger for national security and social development, and has seriously destroyed all normal operations in the work of continuous power supply and smooth flow. Despite the countermeasures adopted by various departments, the theft has not been stopped and the damage is increasing. In view of this, the purpose of this research is to show a transformer box door lock, anti-theft practical effect is good, simple structure, convenient installation:

24/01/22

Oil-immersed transformer single-phase inter-turn short circuit fault

The differential protection is carried out using Kirchhoff's current theorem. When the transformer is working normally or external fault, it is regarded as an ideal transformer, and then the current of the transformer and the outflow current (converted current) are equal, and the differential relay does not work. When there is a fault inside the transformer, both sides (or three sides) should provide short-circuit current to the fault point. The secondary current felt by the differential protection is proportional to the fault point current and the action of the differential relay.