66KV Three-phase Oil-immersed Power Transformer

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66 kv three-phase oil-immersed power transformer according to the international electrotechnical commission standard IEC60076 and the People's Republic of China national standards GB1094 manufacturing. Frequency: 50hz, capacity range: 630-63000 kva, and can be used for power transmission and distribution of power grid with. 1, core choose high quality cold rolled silicon steel sheet, 45 ° full chamfered joint, three steps into the fold iron way, core column and iron yoke are multiple circular cross section shape, may obtain the smaller no-load loss and lower noise. 2, according to the size of the transformer capacity, high and low voltage winding can be set to drum and spiral, continuous or ravel type structure, the structure of the coil insulation ability, mechanical strength, and the selected process to ensure the safe and reliable operation. 3, each station transformer are installed tap-changer, among them, without excitation regulating range: plus or minus 5%; ± 2 x 2.5%, on-load changer range: ± 8 x 1.25%, at the same time, according to the requirement of customer tapping range. 4, tank structure to determine the size, when capacity is more than 8000 kva, the ceiling bell type structure, the capacity is less than 8000 kva below the cylinder type structure, make the whole structure is compact, high mechanical strength, good heat dissipation effect, ensure transformer in full load operation temperature rise no more than specified value. 5, accessory part includes: high pressure casing, low pressure casing, mercury thermometer, note oil drain valves, oil storage tank, grounding bolt, lifting climbing nameplate, etc., when the capacity is more than 800 kva, equipped with gas relay, pressure release valve; More than 1000 kva, equipped with signal thermometer, More than 8000 kva, equipped with remote temperature element. GB1094.1-1996 power transformer general rules GB1094.2-1996 power transformer temperature rise GB1094.3-2003 power transformer insulation level and insulation test GB1094.5-2003 power transformer under short circuit capacity GB/T6451-2008 oil-immersed power transformer technology parameters and requirements (a) 630 kva ~ 63000 kva three-phase double winding no excitation voltage power transformer

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Zhong Yong Electric

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