35kv 1250kVA Three Phase Two Winding Oil Immersed Power Transformer

Product Description35kv 1250kva three phase two winding on load tap changing oil immersed power transformer Specifications1 power transformer 2 ISO9001,ISO14001,OHSAS 18001, CE 3 Apply for IEC, ANSI 4.KEMA Introduction to ProductsThe performances of our S9,S10,S11 series 20KV and 35KV three-phase oil-immersed  transformer conform to standards GB1094-1996 "Power Transformer" and GB/T6451-2008 "Technical Parameters and Requirements of Three-phase Oil-immersed Power Transformer". Its core is made of quality cold-rolled silicon sheet and is of a full-miter non-puncture structure and its coil is made of quality oxygen-free copper. It is artistic in appearance and sage in running and is widely used in transmission and distribution of industrial and agricultural networks. Main Function and FeaturesHigh reliabity,advanced levelof performance,reasonable economical indicators The core joints are of stepped shape with 3 steps,and the surface of the core is coated with cured paint to lower losses and noise. The winding has novel structure and its oil passage is reasonable designed. Its newly designed insulation structure helps enhance its mechanical strength and the short circuit withstanding ability The oil tank is in various types,all have good outlook.   Main Technical parameters for 35kv level,SZ9,SZ10,SZ11 Series three-phase oil-immersed on-load-tap-changing power transformerRated PowerHigh VoltageH.V.Tap rangLow VoltageConnection SymbolShort-Circuit Impedance(%)No-load Loss(KW)On-Load Loss(KW)No-load Current(%)KVKVKV9type10type11type9type10type11type80035               38.5      ±3×2.5%6.3               6.6                                    10                          10.5           11Yd11               YNd116.513201190106010500998099801.051000157014101260128001216012160112501860167014901540014630146300.916002250203018001850017580175800.8520002880259023002025019240192400.825003400306027202173020640206400.8315074040364032302601024710247100.7240004840436038703069029160291600.7250005800522046403600034200342000.6863007.57040634056303870036770367700.6880009840886078704275040610406100.610000116001044092805058048050480500.61250081368012310109405985056860568600.56160001646014810131707402070320703200.54200001946017510155708714082780827800.54250002370021330189601E+051016501016500.5315002750024750220001E+051197001197000.45CertificationsCertificates owned by shenda: 100MVA/220kv power transformer short circuit test report -issued by CESI Italy&CTQC China 120MVA/33KV oil EAF transformer 50MVA/69KV oil power transformer 10MVA/33kv dry-type transformer Type test report -issued by KEMA Netherlands 63MVA/110KV Power transformer short circuit test report -issued by CTQC China 12.5MVA/22KV Rectifier transformer routine test -issued by V-Check korea ISO 9001&ISO14001&OHSAS 18001 CE-POWER TRANSFORMER&FURNACE TRANSFORMER&DRY-TYPE TRANSFORMER&REACTOR Transformer CharacteristicsWinding .The winding must be especially protected - both against high electrical stress due to external over voltages and against mechanical overloads by short circuits. They are made of copper or aluminum. Low-voltage windings are made of strip or flat wire while high voltage windings are manufactured from round or profile wire. ("diamond-dotted paper") bonds the winding into a compact block while drying and increases the short-circuit capacity additionally. Magnetic Core lamination.The three-limb iron core is made of oblique cut Grain-oriented, seven-step silicon steel lamination insulated on both sides, guaranteeing low losses and low noise. These values are even improved by laser treatment. It is protected on the surface with a flash-proof varnish in order to prevent the sheet from corrosion and to reduce the noise. Oil tank.Whether during transport or operation -the tank must be absolutely tight under mechanical stress. We have vast constructional experience, the most modern calculation methods and high-quality welding work. Special attention is paid to corrosion protection. Pretreatment of the surface is processed by phosphating pickling, contributes to corrosion protection, just like multi-coating with preset drying times for each layer. On request, hot-dip galvanization provides for even better protection Test labTesting are conducted for every transformer before delivery.Tests are classified to be routine tests and type test. A - Routine tests: According to IEC 60076 standard , the following tests must be carried out for all units of the transformers a- Measurement of winding resistance . b- Measurement of voltage ratio and check of phase displacement. c- Measurement of short circuit impedance and load losses. d-Measurement of no-load losses and current . e-Dielectric routine tests including the separate source AC voltage withstanding test and short duration induced over voltage withstanding test ( ACSD ) . B - Type tests : The following tests shall be carried out a- Temperature rise test b- Lightning impulse test C - Special tests : a- Determination of