In fact， ground wire is not only a kind of grounding protection. The following describes in detail that ground wire is the general name of grounding system. Ground wire is divided into protective grounding and safety factor grounding device. Among them， safety factor grounding device can be divided into grounding protection， anti electric shock grounding device and anti electromagnetic wave radiation grounding device. Protective grounding is to use it for loop to make the facilities achieve the grounding wire specified by the function.
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.
TrenchinFirst of all， although dry-type transformer has strong moisture resistance， it is generally open structure or very susceptible to moisture， 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 plant
NdolaAccording 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.
With 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.
In fact， ground wire is not only a kind of grounding protection. The following describes in detail that ground wire is the general name of grounding system. Ground wire is divided into protective grounding and safety factor grounding device. Among them，Trenchin6 kV Transformer， safety factor grounding device can be divided into grounding protection， anti electric shock grounding device and anti electromagnetic wave radiation grounding device. Protective grounding is to use it for loop to make the facilities achieve the grounding wire specified by the function.
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， samples shall be taken according to % of the total number of barrels (bottles).
The 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 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， 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.
quality standardGradually， high-frequency vibration damping mechanical equipment，TrenchinPower transformer test report， such as low-frequency vibration damping platform， which can reduce the downward dispersion of the vibration of the dry-type transformer. Then replace the connection between the dry-type transformer and the surrounding engineering buildings， etc. with flexible connection， or use elastic yellow shock absorption mechanical equipment to prevent the vibration from spreading according to the rigid connection. If possible， the dry-type transformer room can also be soundproofed and decorated and sound-absorbing plates and silencing shutters can be used to improve the soundproofing capacity of the dry-type transformer room.
The power transformer is composed of two or more electromagnetic coils wound around the same transformer core. The winding resistance is connected according to the alternating electromagnetic field and works according to the basic principle of magnetic effect of current. The installation position of power transformer shall be considered to be conducive to operation， maintenance and transportation， and a reliable area shall be selected at the same time. The rated capacity of the transformer must be effectively used when applying the transformer.
Some are tied with plastic tape， because the socket can not be pressed firmly during installation， and there is still oil leakage without sealing effect.
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.
Equipment maintenanceFalling foreign matters and piercing
The domestic transformer market is slow
The vibration reduction of collecting and townhouse solves the soft connection of collecting and townhouse. For the copper bar of the low-voltage bus of the equipment， the electromagnetic induced noise oscillation may be transmitted from the townhouse to the building structure. The core of noise reduction solution must be changed to copper wire connection.
TrenchinOil leakage at looper flange
& 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，TrenchinS13-m-200 power transformer， the resistance value exceeds m ohm bus.
With 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.
