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Oil-immersed transformer common failure analysis and testing technology
11/7/2010 8:29:19 PM  Hit:1
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Transformer oil leakage will not only give power enterprise to bring the great economic losses, environmental pollution, also affect the transformer safety running, may cause unnecessary lines even transformer damage accidents, to the power customer bring production loss and life then. Therefore, it is necessary to solve transformer oil leakage problem.
Tank weld oil leakage. For planar juncture oil leakage can be directly by welding, for corner and reinforced joint oil leakage tend to leak after searching forbids, or because the internal stress causes nickel-based again leakage. For such permeability point can be added with iron plate for repair, two sides connection, but will sizzling cropped to a spindle for repair, Three sides according to actual position will joints iron cropped to a triangle for repair, The method is also applicable to the casing current transformer second led 2 exisiting junction box plus connecting corner weld leakage welding.
Hv bushing elevated blocks or into manhole flange oil leakage. These areas is mainly due to improper installation pads, operation of the flange on glue sealing. Sealing glue used before plugging flange between aperture, plugging glue stay stuck completely after curing, exit a flange screw, will glue gun mouth twist into the screw hole, then injected with high pressure will sealant, until the flanges flanges clearance rims chamfered have glue extrusion so far.
Low voltage side bushing leakage. Its reason is affected by busbar stretching and low voltage side fuses derivation, glue bead partial short pressure in threads. By bus tensile, according to related provisions of busbar with expansion joints connected; Such as fuses partial shorter, can readjust fuses derivation length; To adjust electrode is difficult, can be in installation of each sealing glue bead add sealing glue, For increasing compaction force can be gained pressure cap for copper pressure cap.
Explosion-proof tube oil leakage. Explosion-proof pipe is transformer internal failure cause transformer internal pressure is too great, avoid transformer tank rupture security measures. But explosion-proof tube glass film in transformer operation due to vibration bursts easily, and not in time to replace glass, moisture so into the oil reservoir, make the insulating oil damp, insulation level is reduced, endanger the safety equipment. Therefore, the explosion-proof tube removed, modified pressure relief valves can.

 

 

 

 

 

 

Author: Jiande Tongyu Electrical Tools Factory
Website: www.tygluegun.com
Main Products: glue gun?glue stick

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