66KV Three-phase Oil-immersed Power Transformer

66 kvthree-phase oil-immersed power transformer according to theinternational electrotechnical commission standard IEC60076 and thePeople''s Republic of China national standards GB1094manufacturing. Frequency: 50hz, capacity range: 630-63000 kva, andcan be used for power transmission and distribution of power gridwith.
1, core choose high quality cold rolled silicon steel sheet, 45 °full chamfered joint, three steps into the fold iron way, corecolumn and iron yoke are multiple circular cross section shape, mayobtain the smaller no-load loss and lower noise.
2, according to the size of the transformer capacity, high and lowvoltage winding can be set to drum and spiral, continuous or raveltype structure, the structure of the coil insulation ability,mechanical strength, and the selected process to ensure the safeand 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 tothe requirement of customer tapping range.
4, tank structure to determine the size, when capacity is more than8000 kva, the ceiling bell type structure, the capacity is lessthan 8000 kva below the cylinder type structure, make the wholestructure is compact, high mechanical strength, good heatdissipation effect, ensure transformer in full load operationtemperature rise no more than specified value.
5, accessory part includes: high pressure casing, low pressurecasing, mercury thermometer, note oil drain valves, oil storagetank, grounding bolt, lifting climbing nameplate, etc., when thecapacity is more than 800 kva, equipped with gas relay, pressurerelease valve; More than 1000 kva, equipped with signalthermometer, More than 8000 kva, equipped with remote temperatureelement.
GB1094.1-1996 power transformer general rules
GB1094.2-1996 power transformer temperature rise
GB1094.3-2003 power transformer insulation level and insulationtest
GB1094.5-2003 power transformer under short circuit capacity
GB/T6451-2008 oil-immersed power transformer technology parametersand requirements
(a) 630 kva ~ 63000 kva three-phase double winding no excitationvoltage power transformer
66KV Three-phase Oil-immersed Power Transformer