Avoid the load operation of power transformer: if the load operation is long-term， it will lead to the scalding of solenoid coil， slow aging of insulation， short circuit fault between boxes， the cost of energy-saving transformers is significantly higher than that of traditional transformers and the price factor is also a key factor endangering the popularization and marketing of energy-saving transformers. Although there are energy-saving and convenient subsidy projects to help energy-saving transformers， the market has not yet fully operated.
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.
ElmosaWhat is the important role of power transformer
Solenoid insulation deterioration
For example， in the s the radio programs applied by every family in the countryside had a ground wire， and they were often wet with tap water. Protective grounding is to bury the copper plate of metal electrical conductor in the soil layer， and then lead a point of it out of the road with transmission line， which completes the grounding protection. The grounding wire specifies the grounding wire resistance ≤ Ω. Grounding protection is a safeguard measure adopted to avoid safety accidents when using household appliances， office and other electrical equipment.
(I) the distance between the external contour of kV and below dry-type transformer and the surrounding guardrail or courtyard wall shall take into account the convenience of transportation and repair of dry-type transformer， and the distance shall not be less than m; At the angle with actual operation， a spacing of more than m shall be reserved; If metal fence is selected the metal fence shall be grounded and a warning sign shall be hung at a prominent position.
In order to better avoid overvoltage damage， a group of overvoltage maintenance high-voltage Arresters (such as ycs active zinc oxide high-voltage arresters) shall be refitted at the working voltage bus duct side of dry-type transformer.
Therefore， it is necessary to find the short-circuit fault point according to the fault situation， lock the fault point， and analyze the short-circuit fault types of relay protection dry-type transformer. At the same time， if all fields are clear，BaldjovFully sealed oil immersed transformer， disconnect the switching power supply at the fault point， the maintenance work of employees will be carried out smoothly， and the harm will not expand to a greater extent.
discountConnection group structure of dry-type transformer
According to the condition of cracks， galvanized iron wire can be punched into the leakage or riveted with hammer. Then clean the leakage point with toluene and seal it with raw materials. Coated sand casting eyes can be sealed with raw materials immediately.
Before no-load impact closing，BaldjovHow much is 500KVA box transformer， the pose period of overcurrent protection shall be set to zero， and the data signal circuit of steam vehicle relay shall be temporarily connected to the pull-in circuit.
() the installation position of secondary commercial insurance of transformer on column and ground shall meet the following requirements: if there is an disconnector on the secondary side， it shall be installed between the disconnector and low-voltage composite insulator， or the circuit breaker shall be selected as the disconnector; If there is no disconnector on the secondary side， it shall be installed on both sides of the low-voltage composite insulator， and the insulated cable jumper shall be connected to the insulated cable on both sides of the circuit breaker.
Inspection standardAvoid the load operation of power transformer: if the load operation is long-term， it will lead to the scalding of solenoid coil， slow aging of insulation， short circuit fault between boxes， two-color short circuit fault or short circuit to ground fault and dissolution of oil.
In order to promote the use of energy-saving transformers，BaldjovTransformer distribution room， the Ministry of finance， the Ministry of industry and information technology and the national development and Reform Commission jointly promulgated the detailed rules for the implementation of energy-saving distribution transformers of energy-saving products benefiting the people project as early as ， providing subsidies of - yuan / KVA for energy-saving transformers.
Dry type transformer company
BaldjovThe flange surface is uneven， the tightening bolts are loose， and the installation and processing process is wrong， so that the bolts are not tightened well， all anchor bolts of the automobile oil tank at the upper end of the detachable oil cover shall be tied with the lifting jack， and the lifting point shall be on the common earrings or bolts. If necessary， the human resources traction belt shall be used as a guide.
In order to better reduce the probability of short-circuit fault of relay protection dry-type transformer， prevention and key are & ldquo; Prevention and Manipulation & rdquo; Is dominant.
