Falling foreign matters and piercing
Wiring mode of dry-type transformer:
BredaThe 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.
When leaving the factory， the production and processing are not smooth and the sealing is poor. The common fault of oil leakage will be caused after the oil transformer is sealed for a period of time.
AntalahaThe conductor insulation of power transformer is the main part of internal insulation. Some conductors should pass through the middle of electromagnetic coil， or between electromagnetic coil， iron yoke clamp and automobile oil tank wall. Therefore， it is necessary to ensure that this kind of conductor has sufficient insulation compressive strength， i.e. insulation spacing.
Power transformers are also used for testing， which are called test power transformers. They can be divided into inflatable， oil transformer， dry test and other test power transformers. They are the basic test equipment for communication AC compression test for many consumers such as power stations， power supply bureaus and scientific research institutions. According to the specifications of the Bureau of quality supervision， It is used to carry out insulation compressive strength test under required current for various electrical products， electrical components and insulating raw materials.
The insulating layer shaft and the connecting articles between the bell jar and the core shall be removed. If it is a hanging bell inspection， the oil shall be pumped into the bottom of the bell jar before the bell jar can be removed.
The insulating layer shaft and the connecting articles between the bell jar and the core shall be removed. If it is a hanging bell inspection， the oil shall be pumped into the bottom of the bell jar before the bell jar can be removed.
The grounding resistance of， high voltage and bottom voltage shall not be less than % (m & omega;) of the original value. The difference between the three-phase mean value of winding resistance measurement at the same temperature shall not exceed %， which shall not exceed % compared with the last accurate measurement result.
Sound causing short circuit obstruction. If not handled properly， it will cause great damage.
Quality improvementAvoid aging and damage of power transformer iron core insulation: aging of iron core insulation or damage of waterproof sleeve holding anchor bolt will cause large vortex of iron core， and we can"t neglect it in daily application. The common problems of power transformer conductor， power transformer winding and power transformer tapping power switch are analyzed below:
When sampling in bulk gasoline barrels， samples shall be selected according to % of the number of gasoline barrels， but not less than barrels. When sampling in batches of small and medium-sized pails or bottles， 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.
Interpretation and observationOverload or short circuit occurs inside the power transformer. Flammable insulating raw materials are endangered by high temperature and electric isolation，BredaTransformer State Grid， resulting in a lot of steam bodies greatly increasing the internal working pressure of the power transformer， causing the ignition of the casing， causing large-scale power failure，BredaPower system transformer， endangering all normal production， manufacturing and activities. There are three reasons for fire accidents in the operation of power transformers.
During the operation of the transformer， the resistance value of the grounding wire shall be measured accurately every two years.
Dry type transformer manufacturer
BredaWhen the manufacturer of the power transformer samples from the automobile oil tank， after opening the sealing cover， use the cleaned and dried rubber stopper to the oil. At the same time， clamp the branch pipe with your thumb and loosen your thumb to make the oil enter the pipe，
The power transformer is designed according to the temperature protection scheme. The embedded parts in the material layer of high (low) pressure electromagnetic coil poured with integral concrete are provided with longitudinal ventilation duct， which can be equipped with air-cooled machinery and equipment (cooling centrifugal fan). After selecting air-cooled machinery and equipment，BredaManufacturing standard of dry type transformer， the output capacity can be increased by %.
Use fiber materials to seal the bolts to achieve the goal of controlling leakage. The other is to screw out the bolt (nut)， wipe the Fushi blue film remover on the surface， and then tighten it after wiping the raw materials on the surface. After drying， the treatment goal can be achieved.