Supplier Details

 

Year Established:2013

Business Type:

Management Certifiation:

  • 220KV Power Transformer

220KV Power Transformer

Load-ratio voltage regulation, high reliability, advanced level of performances, reasonable economical indicators. The core joints are of stepped shape with 3 steps, and the surface of the core is coated with cured paint to lower losses and noise. Please contact us! Email:

Product Details

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Description

Skype:liujingmec
liujing@mec.com.cn
 
 
Coil        
                         
The high-voltage (HV) coil adopts an interleaved-continuous structure to improve the voltage characteristics under impact voltage and make voltage evenly distributed. All stays and pads are chamfered to keep highly reliable insulation.
    In the transformer winding there is a zigzag oil guide structure so as to fully cool all areas inside the winding, lower the temperature rise of the winding and the hot points of the winding and prolong the service life of insulation. The HV and MV regulation system are independently provided with voltage-regulating winding to balance the ampere turn of each winding, effectively lower the axial electrodynamic force generated at short-circuit of transformer and improve abrupt short-circuit withstanding capacity
The winding adopts radial”0”margin design, between the core and the paper sleeve of LV winding, and between the LV, HV, voltage-regulating windings, as well as before insertion of stays and shroud plate they are fully dried and tightly matched to ensure extremely good compactness and concentricity of the entire winding.
 
Core  
 
The core is made of high-permeable grain-orientated top quality cold-rolled silicon sheet and the material is cut with advanced Germany Geoge GmbH automatic shear line with the cut burrs controlled within 0.02mm.
The silicon sheet fabrication adopts “no-upper yoke—lapped” technology and all lapped joints of the silicon sheet are 45°full-miters. The laminated core sheets are integrally pressed and adhered with epoxy resin to make the three-leg two-yoke core a strong and flat integral one with good verticality precision, this effectively improves no-load performance and reduces noise.
Bracing plates are used as support between coil leg and inner coil. The iron yoke is tied with epoxy resin-impregnated glass fiber band, and the lower iron yoke and the lower section of oil tank is tightened with counter-pressure bolts. The upper iron yoke and the upper section of oil tank are fixed at 3 locations. Hence the body inside the oil tank can withstand the vibration during transportation without any shift.
 
 
 
 
 
 
Rated
Power
(kVA)
High
Voltage
(kVA)
H.V.Tap
Range
 
Low
Voltage
(kVA)
Connection
Symbol
 
Short-Circuit
Impedance
(%)
No-Load
Loss
(kW)
On-Load
Loss
(kW)
No-Load
Current
(%)
 
 
 
 
Series9
Series10
Series11
Series9
Series10
Series11
 
 
31500
 
220
242
 
±8×1.25%
± 8×1.5%
 
6.3, 6.6
10.5, 11
20, 34.5
35, 37
38.5, 66
69
 
YNd11

 
 
12~14

 
 
38
34
30
135
128
128
0.7
 
 
40000
45
41
36
157
149
149
0.63
 
 
50000
54
49
43
189
180
180
0.56
 
 
63000
63
57
50
220
209
209
0.56
 
 
90000
80
72
64
288
274
274
0.49
 
 
120000
99
89
79
346
329
329
0.49
 
 
150000
116
104
93
405
385
385
0.42
 
 
180000
135
122
108
468
445
445
0.42
 
 
 
Main Technical Parameters for three-phase
two winding on-load-tap-changing Power transformer
 
 
Oil tank and accessories 
 
 
 
The tank wall adopts wide steel sheetwhich will be folded into corrugated structure without splicing, in this way welds are decreased mechanical strength is enhanced; meanwhile, the corrugated wall has diverging effect, and thus plays a role in decrease of noise. The routing troughs and control cabinets of the secondary circuit are all made of stainless steel, so the entire transformer has a simple and good looking.
All sealing surfaces use quality sealing material and are precision-machined.
On the edge of the tank there are double sealing grooves, and the outer sealing material is used to shade the atmosphere and ultra-ray to protect the inner sealing being damaged, thus at utmost prolonging service life and enhancing reliability of the seal.
 
         
   
 

Company Profile

We are a professional player in transformer industry,  our annual total production capacity is about 18,000,000 KVA, our factory covers an area of 370,000 square meters and a building area of 100,000 square meters, with total assets of 350 million CNY and more than 1000 staff members with engineering and technical employees accounting for 21%.
Our main products include 220kV and below&200MVA and below oil immersed power transformers, 110kV and below furnace transformers, 110kV and below rectifier transformers, 35kV dry type transformers, 35kV combined transformer substation, 35kV and below amorphous alloy transformer, 35kV and below reactor etc. All of our products' performance measures up to the standards established by International Electric Committee (IEC).
We have many advanced production and testing facilities which imported from Germany and Japan, such as silicon sheet shearing automatic lines, automatic and continuous extrusion lines of electromagnetic wires, Kerosene vapor vacuum drying systems and more than 1,500 sets of production and complete testing systems for professional transformer production and other testing equipment. We can meet the requirements of customers completely.
 We have obtained ISO9001 quality management system and ISO14001 environmental management system certifications and in strict accordance with these standards in our routine.
We also obtained the CE certificate, CTQC test report, Nation Standardization Management AAA Certificate, National Measuring System Certificate and others. Many prizes also have been awarded to us in the past years by the relevant national Authority and local government.
Owing to our good reputation on quality and service, our products have been exported to more than 20 overseas countries and regions.
We sincerely hope we can provide you with best products and satisfied service, and you are always warmly welcome to visit us.
 
 

MEC

 

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