distribution transformer

Oil Immersed distribution Transformers with 110kV

Technical Characteristics:

• Low loss: The no-load loss reduced by about 40%, and the load loss reduced by 15%, compares to the actual National Standards GB6451-1999
• Low noise: The noise level achieved below 60dB, dropped by nearly 20dB compares to the National Standards. We can also manufacture transformers (below 55dB) to meet customers requirements
• Low partial discharge: The full procedure of 110kV products is completed in a depurated workshop, and the metal components, insulation components of the active part are completely rounded end. The partial discharge is controlled below 100pc
• Strong short-circuit withstand ability
• Good Aesthetic: Corrugated tank, shot blast cleaning, electrostatic powder spraying, wide slice radiator and never-fading
• No leakage: All the sealing is fixed, the rims use two sealing and all the sealing is imported. Seriously promise to be no leakage

Structure and Technical Features:

• Windings

HV winding adopts interleaved-continuous or inside continuous model, which improves the winding vertical capacitance distribution under the impulse voltage. Windings are oil-cycle structure so that they can reduce winding temperature rise. The products life is 30 years. The inside of winding has hard supporting and swallow-tail cushion, insulation of the top and the bottom ends are platform pressing plates, makes high mechanical strength and resistance to the sudden short circuit ability. Winding internal insulation parts and active parts of insulation are rounded to reduce partial discharge

• Active part

The active part assembled whole and dried under invariable pressure to ensure symmetrically shrink of windings with less rebound, so effectively improve electrical strength and the short circuit withstand ability.

• Core

The core is made of high quality cold-rolled silicon-steel sheet, without holes, frame structure; the D type yoke structure offers the large area platform. Step-lapping and laminated, cut by step-lap core lamination line from GEORG Co. of Germany in order to guarantee core burr smaller than 20¦Ìm, reduce no-load loss, no-load current and noise level

• Tank

Tanks structures are bell type and barrel type. The plates are curved to corrugated wall. All the sealing is fixed. Metal parts are round horn and go hair. Welding seam and sealed place pass three leakage testing (fluorescence, positive pressure, and negative pressure). The paint is according to the electrical appliances antirust requirements

Technical Data Table of Forced Air Cooling Three-phase Two -winding

Off-circuit Tap changing Power Transformers with Low-loss and Low-noise

for SF10 with 110kV