The 200kVA oil‑immersed transformer is a distribution‑type power transformer with rated capacity of 200 kVA. It is widely applied in 10 kV power distribution systems for residential communities, factory workshops, commercial complexes and rural power grids.
It adopts high‑permeability silicon‑steel sheets for the core and copper windings. Transformer oil serves as both insulation medium and heat‑transfer medium. Heat generated during operation is dissipated by natural convection through the tank and radiators.
Main components consist of oil tank, core‑winding assembly, conservator, HV/LV bushings, on‑load/off‑circuit tap‑changer, gas relay and temperature sensors. Voltage tap adjustment can be realized within ±5% or ±2×2.5% to compensate grid voltage fluctuation.
Oil‑immersed transformers feature good overload performance and proven reliability. Routine maintenance mainly includes oil quality test and sealing inspection.
Typical specifications: HV 10 kV, LV 0.4 kV, vector group Dyn11, impedance voltage 4%, for 3‑phase 50 Hz AC power distribution.
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