69kv 16/20mva Mobile Substation Transformer

Product DescriptionMobile substation is suitable for power failure caused by sudden natural disasters or events such as flood, fire, earthquake and so on. It can quickly arrive at the scene and quickly restore power supply, which plays a role in ensuring economic and social development. SFZ11-20000/69-13.8   Capacity20 MVAPrimary voltage69 kVSecondary voltage13.8 kVFrequency50/60 HzCoolingOFAFConnectDyn1Transformer accessoriesCertificationsCertificates 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 noise level according to IEC 60551 . b- Oil leakage test c- Overload test at 150 % rated current for one hour after temperature rise test ( top oil temperature rise and winding temperature rise must be measured and recorded in the report test also hot spot temperature rise must be calculated and recorded on the report test ) . d- Short Circuit Dynamic stability Test (test report from independent and accredited laboratory for similar transformer will be accepted). Packaging and transportationCompany IntroductionSHENDA electric group is a manufacturer and wholesale company that manufactures good & high quality electric transformers from 2000. The company provides the customized products and OEM service. The factory own the 3 production base worldwide,2 in China and 1 in USA.We also own a transformer research institute with more than 30 electric engineers .Our Services1. Pre-Sale Service- Quick response: reply you within 8 hours, to save your time. - Professional solution: supply professional completed solution base on your technical requirements,  to complete your technical plan. - Quoataion: submit a competive price within 2 days, to promote your business 2. In Sale Service- Supplying stipulated completed drawings - Supplying manufacturing plan and processing photos - Making the test plan and book hotel for the witness person - Making good arrangement of the delivery and shipment 3. Afer Sale Service- Supplying professional supervision and commissioning within 15 days - Training the workers - Providing 12 months waranty of quality and perforance FAQ1,Q:Are you manufacturer?    A:Yes, we are manufacturer. Our factory is in JiangShan City, zhejiang  Province. 2,Q:What is your delivery time ?     A:Depend on the type of transformer. 3,Q:What is your payment term?   A:30% advance by T/T , 70% before delivery by T/T or L/C or we can discuss about it. 4,Q:Are your transformers supported for