跳至主要内容

Oil Leakage Fault Analysis of Distribution Transformer


Why oil filled distribution transformer has the risk of leaking oil?
We will analysis from following  7points.
1. Oil Leakage at Welding Site
Mainly due to poor welding quality, virtual welding, de-welding, pinholes and sand holes in the weld, oil-immersed transformer exposes hidden dangers after operation due to the covering of flux and paint when it leaves the factory. In addition, electromagnetic vibration will cause welding vibration cracking, resulting in leakage. For those leakage phenomena that have already occurred, the first step is to find out the leakage points, which should not be omitted. For serious leakage parts, metal tools such as flat shovels or sharp punches can be used to rivet the leakage points. After controlling the leakage, the treatment surface can be cleaned up. Polymer composite materials are mostly used for curing. After curing, the purpose of long-term treatment of leakage can be achieved.
2. Oil Leakage of Seals
The reason of bad sealing is that oil-resistant rubber rod or rubber pad is usually used to seal the edge and cover of the box. If the joint is not properly handled, oil leakage will occur.  Some are tied with plastic tape, some directly press the two ends together, because of rolling during installation, the interface can not be pressed firmly, can not play a sealing role, is still oil leakage. Fushi blue can be used to bond the joint to form a whole, and the oil leakage phenomenon can be greatly controlled. If the operation is convenient, the metal shell can also be bonded at the same time to achieve the purpose of leakage control.
3. Oil Leakage at Flange Joint
Flange surface is uneven, fastening bolt is loose, installation technology is incorrect, so that the bolt is not tightened properly, resulting in oil leakage. Firstly, the loose bolts are tightened, then the flanges are sealed, and the bolts that may leak are also treated to achieve the purpose of complete treatment. To tighten the loosened bolts, the operation must be carried out strictly in accordance with the operation process.
4. Oil leakage from bolts or pipe threads
When leaving the factory, the process is rough and the seal is not good. The oil leakage fault will occur after the oil-immersed transformer is sealed for a period of time. The bolt is sealed with high polymer material to control leakage.  Another method is to screw out the bolt (nut) and apply Fushilan release agent on the surface, then tighten the bolt after applying the material on the surface. After solidification, the purpose of treatment can be achieved.
5. Oil Leakage in Cast Iron Castings
Oil leakage is mainly caused by sand holes and cracks in iron castings. For crack leakage, drilling crack stop hole is the best way to eliminate stress and avoid extension. According to the condition of cracks, lead wire can be inserted into the leak point or riveted by hand hammer. Then the leakage point is cleaned with acetone and sealed with material. Cast sand holes can be sealed directly with materials.
6. Oil Leakage from Radiator
Oil leakage often occurs in the bending part and welding part of the radiator tube, which is made by pressing the flattened seamed steel tube. This is due to the tension on the outer wall of the radiator tube, the pressure on its inner wall and the residual stress. The upper and lower plate valves (butterfly valves) of the radiator are closed, so that the oil in the radiator is separated from the oil in the tank, and the pressure and leakage are reduced. After determining the leakage site, proper surface treatment is carried out, and then the sealing treatment is carried out with Fushi Blue material.
7. Oil Leakage from Porcelain Bottles and Glass Oil Labels
Usually due to improper installation or seal failure. Polymer composites can bond metal, ceramics, glass and other materials very well, so as to achieve the fundamental treatment of oil leakage.

Transformer Tank Cooling Wall Production line:

corrugated transformer tank wall pressing machine
corrugated transformer tank wall pressing machine

 Automatic Corrugated Fins Wall Manufacturing Line




CORRUGATED FIN FOLDING AND WELDING MACHINES

Corrugated Fins Wall Forming Machine




corrugated fins wall making machine

Full-auto PLC Corrugated Fins Seam Welding Machine




corrugated fins wall seam welding machine

Hydraulic Decoiler




steel roll feeding machine

Corrugated Fins Wall Leak Testing Machine




corrugated fins wall leakage testing machine

Want to know more?(Marketing Title)

Phone: 008615195010186
Email: cnkylt@aliyun.com

评论

发表评论

此博客中的热门博文

How to choose Distribution Transformer?

The Key Selection points of   Oil-Immersed Distribution Transformer . Load Properties of Distribution Transformer: 1) When there are a large number of primary or secondary loads, it is advisable to install two or more transformers. When one transformer is disconnected, the capacity of the remaining transformers can meet the demand of primary and secondary loads. First, the secondary loads should be concentrated as far as possible and should not be too dispersed. 2) When seasonal load capacity is large, special transformer should be installed. For example, in large civil buildings, the load of air conditioning refrigerators, heating electricity and heat, etc. 3) When the concentrated load is large, special transformer should be installed. Such as large heating equipment, large X-ray machine, electric arc furnace, etc. 4) When the lighting load is large or the power and lighting use common transformer seriously affects the lighting quality and lamp life, special lighting tra
1 条评论
阅读全文

CNC MACHINE TOOL CLASSIFIED AS PER THE CONTROL TRACK MOVEMENT

Classification according to the control track of CNC machine tool movement. (1) CNC machine tool controlled by point and position Point position control requires to control the moving parts to move from one point to another for accurate positioning. The requirements for the motion track between points are not strict. In the process of moving, there is no processing, and the motion between the coordinate axes is irrelevant. In order to achieve fast and accurate positioning, the movement of displacement between two points generally moves fast first. And then approaches the positioning point slowly to ensure the positioning accuracy. As shown below, which is the motion track controlled by the point position. point position control motion track The machine tools with point control function mainly include CNC drilling machine,  CNC milling  machine, CNC punch, etc. With the development of numerical control technology, there are few numerical control systems which are only used for po
发表评论
阅读全文

where to buy full set of parts of a disposable skin stapler, who can supply them?

Where to buy a complete set of parts to assemble disposable skin staplers? What are the specific parts in the complete set? How to assemble these parts? If you are a medical device purchaser or manufacturer, you would like to purchase a complete set of standard disposable skin suture accessories that are commonly used in the market at the most favorable price, without the need to invest in molds and have your brand. Please contact us: cnkylt@aliyun.com "Ensure medical quality, source manufacturer supplies complete sets of molds and accessories for disposable skin sutures, providing a stable and reliable accessory option for your medical devices." We are the ORIGINAL Full Set of Disposable Skin Stapler Spare Parts Manufacturer & Supplier! Three key questions of disposable skin staplers manufacturing: Firstly, we need to address three issues regarding the procurement and production of disposable skin stapler parts:  where to buy a complete set of parts? What are the specifi
发表评论
阅读全文