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>> Micro-arc oxidation process and equipment
Regulator series
>> Single, three-phase high-precision fully automatic AC voltage stabilizer (0.5KVA-80KVA)
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Medium frequency heating power supply for oil well production
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Transformer / Reactor Series
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>> Zero Saver Transformer
>> YDJ series high voltage test transformer
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>> Autotransformer
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>> Three-phase isolation transformer
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Technology Exchange Home >> Technical Exchange
On-site partial discharge test and fault diagnosis of gas bushing transformer
<P> <FONT face = Verdana> Foreword Changchun Power Supply Company has built a new 220kV city center substation in the urban network reconstruction project. In order to reduce the gross area, cable outlets are used on both the high-voltage 220kV and low-voltage 66kV sides of the substation. The switchgear factory selected GIS combined electrical appliances. There are two 180MVA oil-gas casing main transformers in the substation. Considering the importance of load and geographical location, the main transformer chose a transformer produced by a famous domestic joint venture. After the installation of the transformer, the conventional high voltage test and chromatographic analysis were carried out according to the regulations. All tests ...
Function principle of transformer cooling device
<P style = "LINE-HEIGHT: 190%" class = f14> <FONT face = Verdana> Power transformer network news: When the transformer is running, its iron loss, copper loss and additional loss are all converted into heat, so that the iron core, windings, etc. Component temperature rises. The heat dissipation process of the oil-immersed transformer is: first, the heat inside the iron core and the winding is transferred to the surface by heat conduction, and then to the oil, and then the heat is continuously brought to the inner wall of the oil tank and the radiator oil pipe through the natural convection of the oil. Then, heat is transferred to the outer surface of the oil tank and radiator oil pipe through heat conduction, and then passes through ...
What are the principles for handling transformer trips?
What is the handling principle of transformer accident trip? <BR> Answer: The handling principle of transformer accident trip is: <BR> 1. Check whether the related equipment is overloaded; <BR> 2. If the main protection (gas, differential, etc.) ) Simultaneous operation, no power can be transmitted until the cause is eliminated and the fault is eliminated; <BR> 3. Jiangsu Province stipulates that one of the heavy gas or differential protection trips. After the gas inspection (if necessary, the DC resistance and chromatographic analysis) prove that there is no obvious failure inside the transformer, the equipment supervisor ...
Electronic basics-working principle of transformers
A transformer is a device that converts AC voltage, current, and impedance. When AC current flows in the primary coil, AC magnetic flux is generated in the iron core (or magnetic core), so that voltage (or current) is induced in the secondary coil. A transformer consists of an iron core (or magnetic core) and a coil. The coil has two or more windings. The winding connected to the power source is called the primary coil, and the remaining windings are called secondary coils. <BR> I. Classification <BR> Classified by cooling method: dry-type (self-cooling) transformer, oil-immersed (self-cooling) transformer, fluoride (evaporative cooling) transformer ...
Electrical industry is still expected to grow 20% this year
<TABLE id = table1 border = 0 cellSpacing = 0 cellPadding = 0 width = "100%"> <TBODY> <TR> <TD> <P align = center> <B> The electrical industry is still expected to grow 20% this year </ B > </ P> </ TD> </ TR> </ TBODY> </ TABLE> <P> This year is an extraordinary year in the development of the electrical industry. It faces rare development opportunities and major challenges and tests. Experts predict that after hard work, the electrical industry will still achieve steady and rapid growth, and the annual increase is expected to reach 20%. <BR> <BR> latest statistics table ...
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