The tap changer of power transformer shall also have strong insulation. kV off load tap changer is generally insulated from the ground by the produced insulating paper pipe factory.
The main reason is that the welding quality of electric welding is poor， there are empty welding， open welding，NarayangangeDry type transformer scb14， needle holes， sand holes and other shortcomings in welding. The oil transformer is easy to be covered with welding powder and paint when leaving the factory， and the potential safety hazards are exposed after operation. In addition， the electromagnetic induction vibration will crack the electric welding and lead to leakage.
NarayangangeUnder normal conditions different oil-based oils cannot be mixed. Under special circumstances， if it is necessary to use new oil of different grades， it should be determined whether the mixed oil with ice degree can be used according to the requirements of the region， and then the oil mixing test should be carried out.
Insulation and heat removal are different. Dry type transformers are generally insulated with epoxy resin， cooled by natural air and large capacity by centrifugal fan. Oil immersed transformers are insulated by insulating oil， insulated by insulating oil in the circulating system inside the transformer， and heat is discharged on the radiator (radiator) of the circulating system inside the transformer.
MasmehlenSound causing short circuit obstruction. If not handled properly， it will cause great damage.
The method and whole process of taking oil sample of power transformer are as follows:
The noise of dry-type transformer belongs to low-frequency noise. In a small area， and then causes gas vibration noise， which is then scattered to the ears of consumers. Although the amount of noise is not very large， the dispersion spacing and adverse effects are very large.
A zero line of the power transformer is connected with the working equipment. Since the voltage formed by the server during operation will be sent to the power transformer along with the cable， the power transformer will be transported and sent to the power consuming machines and equipment. What is the zero line of the actual power transformer? Let"s introduce it to us.
The cycle time of power-off cleaning and inspection shall be determined according to the surrounding environment and load conditions， generally from half a year to once a year;
Performance and main parameters of common metal composites， various welding processes and machinery and equipment， preparation treatment of thick steel plate， blanking process， production and manufacturing process and quality standards of automobile oil tank， riser， welding leakage test and NDT technology， surface treatment process and quality standards， copper， Production process and quality standard of aluminum shield; Body suit iron insertion process， wire installation process， body dryness solution and dry transformer oil solution process vacuum pump oil immersion， general installation process，NarayangangeMaintenance system of oil immersed transformer， leakage test and leakage detection process and quality standards. Performance parameters of key work clothes， machinery and equipment of each process flow; The natural working environment is basically regulated.
Quality inspection reportThe key reason for oil leakage is that there are defects in cast iron parts
Sound insulation treatment of main engine room the key to sound insulation treatment of dry-type transformer room is to start from three levels: window， ventilation and air exchange port and road surface， and apply sound insulation window， silencing cylinder， floating concrete floor damping pad and other sound insulation and noise reduction commodities to achieve sound insulation effect.
When we apply oil immersed transformer， we all know that it works with the help of oil. What if the oil immersed transformer is on fire? What countermeasures should we do?
The insulation distance between the winding and the iron yoke of power transformer is much larger than that between the windings， because the electric field between the winding and the iron yoke is far away and not as symmetrical as that between the windings. In the electric field in the middle of the winding， most of the cables are in phase with the insulating cylinder (plate) in the middle of the winding， that is， which can be equipped with air-cooled machinery and equipment (cooling centrifugal fan). After selecting air-cooled machinery and equipment， the output capacity can be increased by %.
The efficiency of transformer is closely related to the output power level of transformer. Generally the greater the output power， the smaller the loss to output power ratio and the higher the efficiency. On the contrary， the lower the efficiency.
Solenoid insulation deterioration
NarayangangeWith the rapid development of society and the continuous development trend of computers， the calculation of data in the whole process of oil immersed transformer wave has long had results. Only effective selection of calculation entity models and methods is needed， the accuracy of calculation conclusions can meet the needs of architectural design， and scientific and reasonable data method is selected， Not only can the current distribution of the oil immersed transformer be clearly defined in the development stage， but also the winding and other structures of the oil immersed transformer can be effectively arranged and distributed in a certain scope， which greatly facilitates the design scheme of the oil immersed transformer and ensures the stability of operation.
When checking the hook core， the insulation of the electromagnetic coil and the porcelain sleeve is usually accidentally damaged. After the shell of the pottery is broken， if you work again， turn on the photo flash when it"s light， and it"s short when it"s heavy. Therefore，NarayangangeDry type transformer 2500kVA， please pay attention during maintenance. It is not necessary to destroy the insulation. After maintenance， experts can inspect special tools， parts， insulation， etc. and deliver them after they are determined to be complete and reliable.
Dry type transformer