11kv 30~2500kva Oil-Immersed Distribution Transformer

TECHNICAL SPECIFICATIONS:

· Typical Primary: 11KV

· Capacity: 30 to 2500KVA

· Taps: ±2x2.5%

· Frequency: 50Hz or 60Hz

· Phases: Single-Phase or Three-Phase

· Vector Group: Dyn11, Yyn0 or others

· Cooling: ONAN/ONAF

· Insulation Class: A class

· Temperature rise: 60/65K

· Insulation material: Mineral oil or Vegetable oil

· Standards: IEC60076 or Local standard

OIL-IMMERSED TRANSFORMER CHARACTERISTICS

· Low loss, low noise, high reliability.

· Outstanding anti-short-circuit capability, high over-Load capability.

· Simulating analys is being used in the iron-core model, the resonance can be avoided and the noise is reduced. Simulation calculation and analysis of lighting impulse wave being used in the HV winding model; anti- lightning impulse capability is improved.

· The S(B) series of Oil-immersed transformer are the kind of product with low noise and low loss. With rational structure, high-quality material, scientific design, strict craftsmanship and advanced test method, the characteristics of the products are as follows;

· Excellent dynamic thermal stability, outstanding anti-short-circuit capability, high anti-lighting impulse receptivity, high reliability. We play a leading role in the country.

· With excellent overload capacity, the products could operate under 110% overload.

· Low lose, energy conservation, run economically and maintenance free.

· Contour artistic, compact size, small occupation and low cost installation.

· Performance and parameter conform to or excel the standards of GB, IEC or industry.

· Adopting corrugation tank in the fully sealing, the distribution transformer can prevent oil from corrosion effectively and the life time service of transformer is prolonged.

TECHNICAL DATASHEET

GENERAL OUTLINE DRAWING

MANUFACTURING TECHNOLOGY OF OIL-FILLED TRANSFORMER

INSULATION CONSTRUCTION

The insulation class of oil-immersed power transformer is A class. The high-voltage coil and low-voltage coil are placed with the same center. Between the coils, use the thin paper cylinder with little oil clearance construction.

THE OIL TANK CONSTRUCTION

The tank is jointed with high-quality steel. The surface is eliminated rust phosphate coating and painted with the type of FVC anticorrosive paint. It has ability to prevent the corrosion from oil and chemical matter. It can be broadly applied to outdoors with bad environment for its contour artistic, easily installation and maintenance free. 

ABOUT COMPONENTS

All the power transformers equipped with high-voltage bushing, low-voltage bushing, oil-release valve, earthling bolt, lifting board, name plate, pressure valve and so on. The transformers which are over 800KVA are equipped with signal thermometer and gas relay.

HOW TO AVOILD OIL LEAKAGE

· Selected high quality wide plate, vertical and non-splicing.

· All flange sealing surface finishing machinery to ensure the connection flange of the formation and smoothens to prolong the life time service of the seal.

· Adopting the double-seal structure to seal the box edges of the large and medium-sized transformer to ensure that the sealing surface along the boxes does not leak.

· Operating carefully with the shielded welding technology and other advanced technology can fully guarantee the quality of welding. X-ray detection technology is used to check each and every weld."

· The main components, such as casing, radiators, seals, diaphragm seals, butterfly valve, valve and valves are supplied by fixed-supplier. We select the high quality products manufactured by the domestic well-known manufactures with production licenses issued by the ministry of machinery.

· We use high elasticity & anti-Oil products (NBR) manufactured, and high quality components for seals.