Pearl Electric Co., Ltd. >> 110KV Class Three-Winding Off-Load Tap-Changing Power Transformer

110KV Class Three-Winding Off-Load Tap-Changing Power Transformer

Name: 110KV Class Three-Winding Off-Load Tap-Changing Power Transformer
Brand: china-manufacturer-directory.com
SKU: 664977452
Availability: InStock
Rating: 4.9 (107 reviews)

Supplier:	Pearl Electric Co., Ltd.
Price:	US $ 1000-100000/Piece
Min Order:	1/Piece
Quantity::
Trade Terms:	FOB,FCA,EXW

Product Specifications

Prod Model:	S11, SZ11, SZ11-M
Markets:	North America,South America,Eastern Europe,Southeast Asia,Africa,Oceania,Mid East,Eastern Asia,Western Europe
Type:	Transformer
Application:	Audio
Phase:	Three
Coil:	Core-type Transformer
Cooling Method:	Oil-immersed Type Transformer
Winding Type:	Two-winding Transformer
Certification:	Kema CE
Brand:	PE

Product Description

110kV Class Three-Winding Off-load Tap-changing Power Transformer.

Generals
The 110kV Class Two-Winding Off-load Tap-changing Power Transformer manufactured by Pearl Electric with " Pearl" brand is the main product designed and developed on the basis of absorbing the most advanced technology at home and abroad. It features high reliability, low partial discharge, low noise, low loss and high anti-short circuit capability. Its excellent and reliable performance have won customers' as well as experts' reorganizations and appreciations.
Specifications:
Rated H. V.:	110kV± 2× 2.5% 121kV± 2× 2.5%
Rated M. V.:	38.5kV± 2× 2.5% 35kV± 2× 2.5%
Rated L. V.:	6.3 (6.6, 10.5, 11)kV
Vector Group	YNYn0d11
Capacity:	6300~63000
No-load Loss:	11.2~61.6kW
Load Loss	47~270kW
No-load Current:	0.60~0.30%
Tap-changing	Off-load Tap-changing
Cooling Method:	ONAN/ONAF
Reference Standards	IEC60076
Notes: The above specifications may be customized according to customer' s requirement.
Features & Advantages
1. Low partial discharge: the apparent discharge quantity is usually less than 100pC;
2. Low noise: Product of 63MVA or below 63MVA has a noise level less than 60dB;
3. Low loss: no-load loss is reduced by 20 percent compared with that specified in national standards;
4. High anti-short capability: the SFZ10-40000/110 transformer has passed the short-circuit test carried out by China National Transformer Quality Supervision Testing Center.
Electromagnetism calculation:
The insulation strength is comprehensively calculated with reference to the formula of " impulse voltage gradient+ actuation duration" . Parsing imaging method is used for precisely calculating winding magnetic field and ampere-turn balance between windings, thus to minimize the mechanical strength. Electric field wave process and field intensity are calculated, thus to ensure both the principal and longitudinal insulation having sufficient strength under impulse voltage. Advanced auxiliary computer programs are used to simulate and calculate the temperature rise on core and windings, with precision reaching each core step and each winding disk.
Winding:
The interleaved and continuous winding structure is adopted for HV windings, thus to improve the electric distribution and effectively improve the anti-lightning impulse capability. Inner and outer support strip structure is adopted. The support strips and pads are all rounded to improve insulation reliability. Oil-directing structure is adopted in the winding, thus to reduce the hotspot temperature and prolong insulation life. Both the H. V and M. V. windings are usually provided with separate voltage regulating windings, so the ampere-turn of all the windings are completely balanced. These can effectively eliminate the axial electrodynamics force during external short circuit and improve the dynamic stability under external short circuit.
Tank:
Bell-type tank is adopted for the transformer (for transformer of below-20MVA, barrel-type tank is used). The tank wall is made into a corrugated shape with special machining equipment. This will reduce the welding work and the mechanical strength will be much improved. The tank rims are sealed with oil-resistant rubber pad and there is a position-limit device on bottom part of the tank.
Core:
High-quality cold-rolled grain-oriented silicon steel sheets are used for core manufacturing. 45-degree mitring and steps-overlapping structure is adopted. No punching holes in the core. The silicon steel sheet is cut with the most advanced cutting machine, with the cut edging burrs less than 0.02mm. This greatly reduces transformer' s no-load loss.
Cooling Devices and Other Accessories:
The main cooling methods for transformers are ONAN (natural air cooling) and ONAF (air forced cooling). Transformers are designed to operate at full load when fans are in operation, and at 70% of the full load when fans are shut down. Panel-type radiators are used. A more compact size can be obtained for transformers equipped with such radiators. The fans generally blow horizontally, with lower speed and lower noise. The on/off operations of the fans are controlled according to changes in oil temperature and load. Conservator with rubber bladder is used for the transformer, within which are the oil-resistant and sealed bladder for isolating the oil from the atmosphere. To further improve the reliability, the air cell in the bladder are connected with exterior atmosphere through silica gel breather.

Pearl Electric's history may date back to the year of 1958 when it is founded as the Panyu Electrical Motor Factory. With more than fifty years development and company restructuring/reorganization in recent years, Pearl Electric is now ready to realize its ambition of becoming a global power transformer manufacturer and supplier.

Pearl Electric Co., Ltd. is a professional and high-tech manufacturing enterprise engaged in the R&D, manufacturing and sales of various power transformation and transmission equipment. The main product coverage is 110kV (and below 110kV) oil-immersed power transformer, 35kV (and below 35kV) dry-type power transformer, reactors, pad-mounted transformer and prefabricated substation. Pearl occupies a factory area of 9 hectares, with more than 6 hectares of modern factory buildings. Having more than 600 employees and possessing more than 260 sets of specialized manufacturing equipment, Pearl boasts an annual output capability of 6 million kVA transformers, 1.50 million kvar reactors and more than 2000 sets of pad-mounted transformer/prefabricated substation.

Pearl Electric boasts a professional R&D team with more than 50 engineers for the development of new products, design of customized model and guarantee of factory manufacturing. Pearl Electric has also established a complete Quality Management System, with the following certifications passed: ISO9001: 2008 Quality Management Certification, ISO14001 Environmental Management System certification and OHSAS18000 Occupation Health and Safety Management System certification.

Since the inception in 1958, Pearl Electric has always been winning customer's trust and support with the advanced technology, superior quality, considerate service and sincere cooperation. Pear Electricl is highly recognized by authority and enjoys a high reputation in the industry. Such titles are granted to Pearl Electric as "Guangzhou Top 100 Private Enterprises", "Valuing Contract and Keeping Credit Company for 17 Continuous Years", "Guangzhou High & New Technology Enterprise", " Guangdong Top Brand", "Guangdong Top 50 Key Equipment Manufacturing Enterprises" and etc...Pearl products have won various Scientific and Technological Progress Awards at national, provincial and municipal level. The marketing network spreads across the whole China and products are sold also abroad, for example Southeast Asia and Middle East.