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Help Center250kva Three Phase Oil Immersed Power Transformer Manufacture
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250kva three phase oil immersed power Transformer manufacturer
About us---- Elolam Group :
Elolam Group,initiated and established by Shandong Elolam Electric Power Technology
Company,is the short of Elolam Electric Group.
Elolam Group is in the business of designing, producing and selling of high magnetic
oriented silicon steel,fold iron steel ,roll iron steel,cable ,transformer ,and switch.
Eloam aims to provide all-round comprehensive supporting services for the large
power companies.
Eloalm Group successively established transformer manufacturing enterprises and
selling companies in the form of joint venture or cooperation in Africa,East, south
and west of Asia countries and regions .
Eloam Group therefore become a real multinational group enterprise in the power
transmission and transformation supporting industry.
Elolam Group annual meeting in 2013
The detailed information of Winding:
1) The high-voltage (HV) coil adopts an interleaved-continuous structure to improve the voltage characteristics under impact voltage and make voltage evenly distributed. All stays and pads are chamfered to keep highly reliable insulation.
2) In the transformer winding there is a zigzag oil guide structure so as to fully cool all areas inside the winding, lower the temperature rise of the winding and the hot points of the winding and prolong the service life of insulation. The HV and MV regulation system are independently provided with voltage-regulating winding to balance the ampere turn of each winding, effectively lower the axial electrodynamic force generated at short-circuit of transformer and improve abrupt short-circuit withstanding capacity.
3) The winding adopts radial “0” margin designed, between the core and the paper sleeve of LV winding, and between the LV, HV, voltage-regulating windings, as well as before insertion of stays and shroud plate they are fully dried and tightly matched to ensure extremely good compactness and concentricity of the entire winding.
About the testing of power transformer:
• Measurement of winding resistance
• Ratio test
• Vector group
• Separate source voltage withstand test
• Induced over-voltage
• Insulation resistance
• Oil leakage test on fully assembled transformer for 12 hours
• Measurement of impedance voltage
• Magnetic balance
• Measurement of no-load loss and current
• Measurement of load loss (at normal & extreme taps)
• Tests on on-load tap-changer
• Tests on on-load tap-changer remote control panel
• Efficiency at 50%, 75%, 100% loading at unity p.f and rated terminal voltage (Corrected to 75C)
• Lightning impulse withstand test
Notes for placing orders:
Transformer type: rated capacity kVA
Number of phases: three-phase or single-phase
High voltage: KV
Low voltage: KV
Frequency: 50HZ 60HZ
Tapping range:±4×2.5% ±3×2.5% other
Connection group: Yyn0 or Dyn11 or other
Impedance voltage: 4% or 6% or other
Trade Terms:
1.Payment: 1) 30% in advance, balanced 70% to be paid before dispatch. 2) L/C
2.Port of loading: Qindao Port, Tianjin Port , Ningbo Port and Shanghai Port
3. Delivery time:10-30 days according to order quantities.
Other related accessories for oil immersed power transformer :
corrugated oil tank
electromagnetic wire
cooling finned radiator
iron silicon core .
Send Inquiry to This Supplier
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