Operation of oil immersed transformer
Oil leakage at electric welding position
FatikariFirst of all， although dry-type transformer has strong moisture resistance，FatikariThree phase transformer price，Fatikari315 box type transformer， especially the insulation level of dry-type transformer manufactured in China is low (lower flame retardant grade) Therefore， the dry-type transformer can obtain high stability only when the air humidity is below %. The dry-type transformer shall also be prevented from stopping operation for a long time to prevent serious damp. When the grounding resistance value is less than / V (operating voltage)， it indicates that the transformer is seriously damp， and the trial operation shall be terminated.
Power transformer is an idealized supporting facility transformer for medium cabinet and high-voltage cabinet at the present stage and can be equipped with safety protective casing according to different waterproof grades. It is applicable to key or unique natural environment sites such as multi-storey buildings， commerce， airports， tunnel construction， and the selected structures and connections are also different. Then， what are the groups of dry-type transformers? How to carry out the connection? Or basically introduce it with the network of dry-type transformer manufacturers.
Oil immersed transformer
For the leakage that has already occurred， find the leakage point first， which can not be ignored. For the position with serious leakage， shovel or sharp punch can be selected. The leakage point can be riveted with special tools for metal materials. After manipulating the leakage， the treatment surface shall be cleaned and tidy. Polymer composite materials are mostly selected for dry consolidation. After dry consolidation， the goal of long-term treatment of leakage can be achieved.
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.
The proper selection of Anhui dry-type transformer has a key effect on improving the safety and smooth operation of power system software. In the above original text， we have already mastered the structure and characteristics of dry-type transformer. In this part， we will describe how to select dry-type transformer according to the load characteristics and application environment of dry-type transformer.
The no-load impulse closing working voltage shall not exceed % of the working voltage marked on the gear of the transformer， the closing frequency shall be times， the delay time after power receiving shall not be less than min， and the time interval of each closing shall not be less than min.
Market trendThe time difference between different steps of three-phase power switch of switching power supply shall be less than ms， the closing shall be maintained by high-voltage arrester， and the neutral line of transformer shall be reliably grounded (it shall be grounded immediately).
The noise of dry-type transformer belongs to low-frequency noise. In a small area， most of it is scattered according to the building structure. This kind of low-frequency noise is scattered to the household house according to the house building， 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.
Under normal conditions the actual operation of the oil immersed transformer shall be undertaken by the on-site operation and maintenance management staff. Within one week of grid connected operation， and immediately communicate and contact with the on-site project staff in case of any problems the operation and maintenance management staff shall improve the safety inspection range of the transformer， so as to ensure the reliable and stable operation of machinery and equipment.
Oil leakage at electric welding position
Total quality assuranceThe no-load impulse closing working voltage shall not exceed % of the working voltage marked on the gear of the transformer， the closing frequency shall be times， the delay time after power receiving shall not be less than min， and the waist rail shall be & phi; mm galvanized wire shall be wound over turns in an even number. The iron wire shall not have a connector and shall be tightened after winding. The distance between the waist rail and the energized part shall not be less than .m.
FatikariSound 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，FatikariTransformer power， 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.
Difference between dry-type transformer and oil immersed transformer:
Before application， the sampling container shall be cleaned with vehicle gasoline， soapy water or other organic solvents (such as trisodium phosphate) except oil stains， and then washed with tap water until it is not alkaline， and the water can be evenly distributed from the bottle， and then cleaned with purified water for many times. The cleaned sampling container shall be dried in a ℃ drying oven. After refrigeration， the bottle cap shall be tightly closed and cannot be opened before application.