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Oil Immersed Distribution Transformer

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Our teams of skilled professionals are dedicated towards managing the timely production and export of Oil Immersed Distribution Transformer - Up to 35kV. We ensure our range is manufactured using high-grade forged carbon steel and alloys which are good resistant against corrosion and rusting. The splendid technical features of this transformer are model of voltage regulation are excitation voltage regulation (OLTC), off-excitation voltage regulation. It is used at all power stations at an ample range.
Technical Specification:

  • Voltage level: 35kV
  • Model of voltage regulation: excitation voltage regulation (OLTC), off-excitation voltage regulation
  • Power Capacity: 4000kVA and below
  • Frequency: 50Hz, 60Hz
  • Phase No.: three phases
  • Vector Group: Yd11, Ynd11, Dy11, Dyn11, Ynyn0d11
  • Impedance Voltage: According to customers¡¯ requirements
  • Service Condition: According to customers¡¯ requirements
  • Type of cooling: ONAN, ONAF
  • Insulation level: Power frequency voltage withstand: AC-85kV, impulse withstand voltage: LI-200kV
Structure and construction features:
Core
The core sheets are cut by the step-lap core lamination line from GEORG Co. of Germany. They are step-lapping which ensures a particularly favorable magnetic flux distribution at the joints. No-load loss, no-load current and noise are minimized
Active Part
Bringing board construction is adopted. In order to strengthen ability of withstand short-circuit, we nail some pressure nails around pressure board and use support beam to connect HV and LV claps to make cores a whole. Otherwise, we paint special plastic to surface of core pole to make the silicon steel sheets link. After solidification, core sheets are a whole body so they can reduce noise and increase mechanical strength and prevent rust. Underside active part support wall of tank with strong electric pressure board in order to make underside active part fixed safely
Windings
HV winding is continuous model while LV winding is continuous or screwy model. And regulation windings are separate, so turns are even and mechanism power are minimized HV and LV windings use construction of conductor of oil which makes oil oriented, so oil stream will move heat away
Tank
Tanks structures are bell type and barrel type. The plates are curved to corrugated wall. Our tanks are good aesthetic, compact and high ability of mechanical strength. Avoiding leakage, there are fine machining flanges in key connection parts (bushings, pressure valves, switches etc.)
Technical parameters:
  • S10 series 35kV three-phase double-winding off-load tap changer power transformer
  • SZ10 series35kV three-phase double-winding load tap changer power transformer.
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