Part Ⅰ: 500kV Power Transformer Overview

The 500kV series oil-immersed power transformer is a series of transformers with low noise, low loss, low partial discharge, high short-circuit resistance and strong overload capacity successfully produced by digesting and absorbing advanced concepts at home and abroad, and through independent optimization and innovation. The electromagnetic calculation and verification analysis of this series of transformers use advanced design software for calculation and analysis, and the structural design uses SolidWorks three-dimensional software for auxiliary design.

The 500kV power transformers are mainly made of iron core and windings, which are placed in the oil tank that filled with insulating oil. It is mainly used for power plant, power transmission and distribution station as the equipment of power transmission.

The transformer structure layout is reasonable. According to the calculation and analysis results, a reasonable insulation structure, wire specifications and magnetic flux density are selected. Perform accurate calculations on various cooling methods, perform thermal calculations on periodic overloads and temporary overloads of windings, and select the most suitable cooling method among cooling methods such as fin air cooling, strong oil air cooling, and strong oil water cooling. Minimize the oil level and winding temperature rise.

500kV 3-phase 2-winding Power Transformer
Product Attributes
Model No.
Application	Power
Coil	Core-type Transformer
Frequency	50/60Hz
Phase	Three
Cooling Method	Oil-immersed Type Transformer
Capacity range:	240000kVA-480000kVA
Operating Ambient Temperature	+40 °C--30 °C
Operating Altitude	≤1000m
Operating Max Wind Speed	≤35m/s
Earthquake acceleration	horizontal acceleration ≤0.3g
	vertica I acceleration ≤0.15g
Standard	IEC 60076-1:2000, IEC 60076-2:1993, IEC 60076-3:2000, IEC 60076-5:2006, IEC 60137:2003; ANSI, IEEE, AS, etc.
Supply Ability & Additional Information
Packaging	Seaworthy Packing
Transportation	Ocean
Supply Ability	High
HS Code	85042100
Payment Type	L/C, T/T
Delivery Time	60 Days
Place of Origin	China
Port	China Sea Port
Incoterm	FOB, CFR, CIF
Packaging & Delivery
Selling Units:	Set/Sets
Package Type:	Seaworthy Packing

Part Ⅱ: Product Features

1. High Reliability:

Temperature rise: the temperature distribution can not get effectively controlled may result in the aging of transformer insulation. There is no over-centralized temperature area in the transformer interior and the insulation life has been ensured through the analysis of oil flow and temperature field in transformers.

The reliability of products has been greatly improved.

2. Low power loss and low operation cost

The transformer has relatively low losses through the optimized design, the detailed analysis of leakage magnetic field and the losses distribution. The maintenance cost has been lowered through the Customer-oriented design.

3. Customer-oriented Design

Based on the 3D design method to simulate feeders, operation filed and terminal box arrangement are in full consideration of operating conveniences, which meets the requirements on cost lowering and customization, as well.

4. High Earthquake Resistance

The casing design adopts the dynamic design method, the horizontal acceleration is set as 0.5g, the waveform is set as the resonant sinusoidal third harmonic, and the loading position is the lower end of the casing flange seat. The transformer body adopts the static design method, and the static horizontal acceleration is 0.5g.

5. Good Mechanical Strength

① Through software simulation, the weak points of structural parts are eliminated to improve the mechanical strength of structural parts.

② Made of high strength steel plate.

③ Laser cutting equipment is used for processing, with small deformation and stress of structural parts.

Part Ⅲ: Structural Feature

1. Iron Core

① The iron core is made of cold rolled, granular-oriented, low-loss and high magnetic conductive silicon steel sheet, which is of multi-step completely tilted structure to reduce the loss and noise.

② Iron core with fixed clamps optimizes the design so as to ensure mechanical strength and to reduce leakage losses

③ Adoption of PET banding structure ensures the clamp force of core column and lowers the noise.

2. Winding

① HV winding adopts entanglement or inner screened continuous type with phase insulation structure to ensure insulating strength.

② MV/LV windings adopt high strength or adhibit-transpostion conductor, reinforced cooling to reduce the temperature rise and enhance capability of short circuit withstand.

3. Active-parts Assembly

① Cold pressing ensures cleanness of the body active parts and the reliability of leads.

② Adoption of whole assembled phase insulation so as to reduce the assembly time and effectively guarantee the dimension and shape of the insulation structure.

③ HV lead adopts specially molded insulation parts for protection which effectively guarantees its insulating strength and reduces partial discharge.

4. Oil Tank

① Thee-dimension finite element strength analysis and Pro-E mold is adopted, which have reinforced the mechanical strength.

② Adopting of welding automatic submerged arc-welding and ultrasonic of fluorescence leakage test to guarantee leakage -free The surface coating is strictly controlled.

5. Assembly and Routine Test

① High qualified components to ensure good performances.

② After assembly, strict pre-delivery test according to standard, with exquisite testing technique and equipments to provide high quality and reliable product.

③ Effective positioning structure to guarantee the fastness of the body during transportation or in service.

Part Ⅳ: Product Main Parameter

500kV Two-winding Power Transformer
Rated Capacity (kVA)	Rated Voltage and Tapping Range		Vector Group	Impedance Voltage %	No Load Current %	No Load Losses kW	On Load Losses kW
	HV	LV
240000	500/√3±2×2.5%	10.5~20	li0	14~16	0.2	110	420
480000	550±2×2.5%		YNd11		0.2	190	950

500kV Three-winding Power Transformer
Rated Capacity (kVA)	Rated Voltage and Tapping Range			Vector Group	Setp-up set			Impedance Voltage (%)
	HV	MV	LV		No Load Current %	No Load Losses kW	On Load Losses kW	HV-MV	HV-LV	MV-LV
250000	500/√3	242/√3±8×1.25%	10.5~66	la0i0	0.2	70	370	11~12	34~38	20~24
334000					0.15	95	485

Part Ⅳ: Structural Diagram

Part Ⅴ: Quality Warranty

Part Ⅵ: Application

Part Ⅶ: Packaging and Transportation

Before packing the transformer, make a packing plan, and carry out packing according to the design scheme and plan when packing. The packing list corresponds to the materials in the box one to one. Pack the box in two copies, one in the packing box and the other nailed outside the packing box. Important parts and spare parts are packed in wooden boxes, and the box numbers are set in order.

The transformer is transported in bare installation, and the fuel tank is emptied before transport. It is tied to a transport vehicle by a wire rope, and the transport speed does not exceed 15km/h.

The terminal is guaranteed to have large-scale transformer lifting equipment, and the lashing is firm after loading to ensure safe and reliable transportation.

Part Ⅷ: Factory Tour

Part Ⅸ: Service Guarantee

1. To provide all technical information and drawings as per contract promptly. QRE is oblidged to invite client, if neccessory, technical design review.

2. To carry out spot technical service as per client's schedule, offer guideness for installation and commis-sioning according to technical information and drawings.

3. For relevant auxiliary equipment procured by customers, QRE will provide related technical information to meet requirement of equipment interface.

4. To execute stipulations in MOU or agreemaent signed by seller and buyer strictly.

5. To train staff from client for equipment installation, commissioning, application, maintenance as stipulated in the contract.

6. To reinforce pre-sales, mid-sales, after-sales service, to carry out "24-hour service", "service in advance", "overall process service", "lifelong service" in our manufacturing, installation, commissioining and main-tance.

7. To meet spare parts' requirement by customers at any time.

Part Ⅹ: Contact Us

Looking for ideal 330kV 3-phase 2-winding Power Transformer Manufacturer & supplier ? We have a wide selection at goods prices to help you get creative. All the330kV 3-phase 2-winding Power Transformer are quality guaranteed. If you have any question, please feel free to contact us.

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