Supplier Details

Year Established:2013

Business Type:Manufacturer, Trading Company

Management Certifiation:

  • Furnance transformer

Furnance transformer

An electric furnace transformer is used to supply power to an electric furnace, which lowers the high voltage to the furnace-required lower voltage.

Product Details

Quick Details

Description

Skype: liujingmec
liujing@mec.com.cn
 
 
Main function and features

An electric furnace transformer is used to supply power to an electric furnace, which lowers the high voltage to the furnace-required lower voltage.
Its type varies with the type of electric furnace, so the transformer has many types. Currently we manufacture following types: arc furnace transformers used for steel-smelting (including load- ratio voltage regulator type, ni-load voltage regulator type, and built-in reactor type); blast furnace transformers used for smelting of iron alloy, calcium carbide (single phase, three-phase, load ratio voltage regulator and no-load voltage regulator). All are energy-saving products with low power loss. The cooling modes are self-cooling mode, forced water cooling mode, etc.

Non-excitation-tap-changing Arc Furnace Transformer Technical Parameters.
 
Manufacture:
Core: effectively upgrade transformer’s no-load performance by below methods:
1)    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 burs controlled within 0.02mm.
2)    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 noises.
3)    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 section of oil tank is tightened with counter-pressure bolts. The upper iron and the upper section of oil tank are fixed at three locations. Hence the body inside the oil tank can withstand the vibration during transportation without any shift.
 Winding:
1)    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.
2)    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.
3)    The winding adopts radial “0” margin designed, 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.
Oil tank and accessories
1)  The tank wall adopts wide steel sheet, which will be folded into corrugated structure without splicing, in this way welds are decreased and 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.
2)  All sealing surface use quality sealing material and are precision-machined.
3)  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.
 

Rated power (KVA)

With series reactor

With series reactor

Primary voltage

Secondary voltage

(V)

Rated secondary current (A)

Type of taping

Connection symbol

Short circuit impedance

(%)

Series reactor

No-load loss

(KW)

On-load current (KW)

No-load current (KW)

No-load loss (KW)

On-load current (KW)

No-load current (KW)

Short-circuit impedance

Rated power (KVAR)

Reactance voltage drop (%)

Big

Small

630

800

1000

6

6.3

10

10.5

11

200

170

116

98

1819

2609

2887

No-load tap changing

Dd0

Dy11

8-9

7-8

120

150

190

19

2.4

2.7

3.1

8.6

11.0

14.0

3.0

2.9

2.9

2.2

2.7

3.1

11.0

13.5

16.5

3.0

2.9

2.8

24-26

10-11

1250

1600

2000

210

180

121

104

3437

4399

5499

200

260

320

16

3.6

4.1

4.6

17.5

22.0

27.0

2.6

2.5

2.4

3.7

4.6

5.6

18.5

24.0

28.0

2.6

2.5

2.4

22-24

9-10

2500

3150

220

190

127

110

6561

8267

280

350

11.2

5.2

6.0

32.0

39.0

2.3

2.2

6.7

8.0

34.5

41.5

2.3

2.2

21-23

8-9

4000

5000

240

210

139

121

9623

12028

340

360

8.5

7.6

9.4

46.0

54.0

2.1

2.0

 

 

 

19-21

7-8

6300

8000

260

240

210

139

23900

17765

430

460

5.7

11.8

15.0

63.0

74.0

1.9

1.8

 

 

 

 

 

 

Rated power (KVA)

Primary voltage (KV)

Secondary voltage (V)

Secondary step voltage (V)

Rated secondary current (A)

Regulation voltage step

Connection symbol

Short-circuit impedance (%)

Cooling method

Invariableness power

Invariableness current

10000

35

66

280-240

314-270

353-305

240-100

10

24056

5 steps invariableness power 14 steps invariableness current

Dd0

Yd11

Ynd11

7-8

6-7

(35KV)

7.5-8.5

(66,110KV)

OFWS

or

OFAF

12500

270-116

11

26729

16000

205-137

12

30287

20000

35

66

110

392-340

436-380

489-425

547-475

610-530

673-585

760-660

340-158

13

33962

25000

380-184

14

37984

31500

425-201

16

42792

40000

475-223

18

48619

50000

530-250

20

54467

63000

585-277

22

62467

80000

660-310

25

69982

 

 

Its type varies with the type of electric furnace, so the transformer has many types. Currently we manufacture following types: arc furnace transformers used for steel-smelting (including load- ratio voltage regulator type, ni-load voltage regulator type, and built-in reactor type) Please contact us! Email: liujing@mec.com.cn

Company Profile

Liaoning MEC Group Co., Ltd. is located in China’s famous coastal Dalian city. The company is a comprehensive group, the business scope includes international project contracting, international trade and domestic trade, environmental engineering, e-commerce, real estate and property management, warehousing and logistics , and investment.

The group company was founded in 1994. Up to now, the average annual turnover is around 2.2 billion yuans, of which, the volume of import and export amounts for more than USD 250 millions. The company keeps business relations with several thousand firms and enterprises home and abroad.

All along with the development during the past twenty years, we never forget our responsibilities to the society. The company is persistent in providing supports to the public welfares, its year in year out public donation activities have won broadly recognitions from the social communities as well as governmental authorities.

We adhere, with the company’s good HR resources and scientific management models, the ideas of advance decision making, moderate operation, prudent management, sustainable development, and abide by the core values of being realistic, to create and to share. We do our best to provide our customers with added service.

 

 

Post Buying Request

  • * Country:Please select country
  • * Title:Please input title
  • * Message:Please input message
  • Your message must be between 20-8000 characters
  • * Your Email Address:Please input Email
  • Your email is also your login ID