The main reasons for burning electric power transformers in the electrical grids are as follows:
▲Load Balance on the three sides 3 phase when linking the subscriptions by the engineering and technical personnel in order to find that a visa is loaded with a higher stream than the engine and another visa loaded with a low stream, which leads to extreme heat in the transformer files, and also a current pass in Line Equation, the order that if it continues, leads to the failure of transformers' work.... And when installing Powermonic devices on the adapters and analyzing them in the computer, he found that the load is unbalanced for most of the converters, as the load of one face reached most of the converts is 400 amp and the rest is between 70-100 amp .. And this is one of the reasons the transformers were burned....
▲There are many transformers without linkfuse Cut out fuse on the converter where the link is direct or by wire instead of Alment Fuse the important and sensitive part of link fuse in Qatar (10 mm square or 5 mm square) as a diligent engineer, technical or electrician without consideration of capacity The converter, which holds 100-200 amp, which leads to the burning of the transformers, where it is preferred to use the product fuse compatible with the converter capacity, and the use of the product fuse 50 amp for the converter (250 KVA), which is one of the big mistakes that cause the burning of the converters.
▲Do not install lightning barriers for many transformers especially in old transformers or there are lightning barriers but the connection is not scientific and not controlled especially at the bottom (tinking the faces from the bottom with some) by rolling a wire on a manual wire and not using (tide) the terminal and locking it through the cap Hydraulic or cutting ground wire by children, or the lack of ground rod and the lack of use of a buri and insert it with a plastering to protect the copper wire in the case of lightning and thunder, the ground network is inadequate for transporting cargo to the ground, leading to the burning of transformers.
▲High Voltage Side High Voltage Side broken or Low Voltage Side or the low pressure side or the presence of mushrooms in the weakness or the presence of luxury in the converters due to long periods of working and the absence of annual maintenance on the converters, so when rain falls, the water leaks. I'm inside the transformer and mix with Oil causes the burning of the transformers so it's a must to maintain the transformers before winter and climb the transformers....
▲Weakness and fragile in the interchangeable isolation from the high pressure and low pressure, or the weakness of installation, or the lack of good connection to the isolation as a result of continuous lack of maintenance and lack of cleaning the insurgents, a dangerous order leads to a touch or a palace between the metal parts and the stand of the current ...
▲There is no cycle cutters on transformers and direct link to increase load or burn cycle cutters and there is no alternative so all technicians and engineers must be informed to install two cycle cutters for each converter to take into account the not loading of the loader with more than 80% of its verified current with installation (se) tting) for every cycle cutter.
▲For more understanding, 2 cycle cutters are installed for each 2x A ِ250 capacity converter, 250KVA for each 250KVA converter with setting (Setting) for each cycle cutter on (1) and is the highest Range and in this case, the total bearing of 250A is (500)A for each conversion and this load exceeds The maximum load for a 250KVA roundabout, and the rest is 350A, which means more current than expected in this case, all engineers and technicians must be informed to install (Setting) cycle cutters (250A) at (0.7 or 0.8).
▲Network violations and lack of control over thefts and violations of many participants and violations of electrical equipment, and the license of electricity wages .. And the lack of security of the electric grid in full picture.
▲No brass bar mounted on the convertible pole from the low pressure side of the nap without getting a laziness between the conversion pole and the compounded pole.
▲Not imposing the transformers in an artistic way and being satisfied with the transformer body without imposing the neutral. .. These are all the reasons for the increase in loads on the network, in turn, a reason for the burning of the transformers.
▲The terrible rise in Over Loading, where it is known that the overloaded allowed leads to a higher pressure of isolated oil inside the main tank, and a higher evaporation rate, and this steam result can be ignited if it continues to escalate, besides the heat and heat of the files that The result of overloading, and not Cooling devices are operating... In addition to this, the non-working of preventive devices or the turnover cuts, burning them, and there is no alternative ..
▲The last but not the least, patrol tests and inspections of the alternator, oil and insulation, file temperature, centenary, and short circuit tests must be done to know any defects or shortcomings in the files, as well as a pregnancy test to know any defects and defects inside the iron heart... Also testing and maintenance of fans and coolers.
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