The electromagnetic coil is wound with copper power wire or foil and lifted with glass fiber. The epoxy adhesive does not need filling. The vacuum drying equipment is used for degassing and dehumidification. The overall concrete is poured with high fracture toughness， resistance to short-circuit faults， common faults and impact. The work is diligent.
If the above provisions are not met， the problem of dryness shall be solved. Generally， it is OK to operate the centrifugal fan for a period of time. Check the cleanliness of the power transformer. If too much dust is found， it must be eliminated to ensure indoor ventilation and avoid insulation penetration. In particular， pay attention to cleaning the insulators of the power transformer and the top and bottom ends of winding resistance installation. Portable centrifugal fan or dry air compression or N shall be used to clean the dust in indoor space that is not easy to reach， such as ventilation duct， and there shall be no dirt.
ObenovaThe transformer manufacturer shall not use hand touch method to detect energized high-voltage equipment， such as transformer in operation and neutral grounding equipment of arc suppression coil. For the equipment without power supply and whose shell is reliable grounding device， the temperature or temperature rise must be tested by hand. The secondary equipment can be inspected by hand touch method when it is hot and vibrated.
& ldquo; of wiring transformer; Enter & rdquo; And & ldquo; Output & rdquo; Use a megger to test the grounding resistance between the terminal and the ground wire. When accurately measured by V megger， the resistance value exceeds m ohm bus.
Zhang BoliCommon problems of tap changer of power transformer
The sampling container is a colorless glass bottle with a wide mouth ground glass plug with a volume of .kg or kg. - bottles shall be collected at a time for analysis and experiment. Labels shall be attached during sampling. Pay attention to the name source， sampling date， sampling person， weather conditions and other materials of the oil sample.
How to reduce the failure of dry-type transformer?
In the electric field of the winding to the yoke， there must be a strong line breaking component， so that sliding flash charge and discharge may occur at a lower current. In order to better solve this disadvantage， the appearance of the insulating parts between the winding and the iron yoke should be the same as that of the medium horizontal plane of the winding to the iron yoke insulation as far as possible，ObenovaPower supply transformer， so as to reduce the electric field component intersecting with the insulating parts.
Transformer manufacturer
The long-term overload of power transformer will slowly cause the scalding and insulation aging of solenoid coil， resulting in short circuit between coils， two-color short circuit or short circuit on the ground， resulting in the ignition of power transformer. Therefore， the insulation compressive strength of power transformer shall be tested before installation and operation， first take out the low-voltage waterproof sleeve and the on load transformer power switch， then lower the bell cover anchor bolt of the large cover， slowly hang the galvanized steel wire rope with sufficient lifting net weight on the commonly used earrings， wear round steel from top to bottom in the surrounding screw holes， and count the spacing and specifications for easy reinstallation. At the same time， the cable wind shall be added on all sides to ensure that the core international body will not be damaged during the whole lifting process. After lifting for mm， stop the lifting， stabilize the bell cover， and check the bearing capacity of the lifting core， center of gravity and Jack. After everything is normal，ObenovaDry type transformer 125kva， and rotate the crane to place the bell cover on the clean skid.
After tightening the loose bolts， seal the flange， and solve the bolts that are likely to leak， so as to achieve the goal of complete treatment. Tighten the loose bolts strictly according to the actual operation and processing technology.
The dry-type transformer is composed of two winding resistances， resulting in four wiring groups: & ldquo; y， Y & rdquo;， & ldquo; D， Y & rdquo; & ldquo; y， D & rdquo; and & ldquo; D， D & rdquo;. In China， only & ldquo; y， Y & rdquo; and & ldquo; y， it will not be upgraded. All marks show that with neutral line， it will not be upgraded The letter N after the English letter Y indicates that the neutral line has transformer grounding wire. Yn wiring group， when UAB and UAB overlap， it is indicated by & ldquo; & rdquo.
Noise dispersion of dry-type transformer
TrustworthyAfter the oil is drained， 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.
The equipment can eliminate the shortcomings found in the patrol inspection， clean the porcelain waterproof casing casing， remove and replace the cracked or brittle leather pad check and tighten the node， replenish the oil with less oil， check and replace the silica gel of the breathing mask， etc.
Then clamp the branch pipe with your thumb， clearly put forward the glass test tube， rotate and release the oil in the tube to clean the sampling tube， carry out it twice and then draw the oil sample.
ObenovaThere are also many problems to pay attention to in the preventive measures and process of dry-type transformer damping. What are the key effects and functions of dry-type transformer damping and the corresponding preventive measures? Let"s master and consult in detail with the small editor of the dry-type transformer manufacturer.
Noise pollution control and prevention measures of dry-type transformer
Loose core screw
