Pearl Electric Co., Ltd. >> Power Transformer up to 110kv and 220mva (50~220MVA, 11~110kV)

Power Transformer up to 110kv and 220mva (50~220MVA, 11~110kV)

Name: Power Transformer up to 110kv and 220mva (50~220MVA, 11~110kV)
Brand: china-manufacturer-directory.com
SKU: 686584252
Availability: InStock
Rating: 4.3 (137 reviews)

Supplier:	Pearl Electric Co., Ltd.
Price:	US $ 10000/Piece
Min Order:	1/Piece
Quantity::
Trade Terms:	FOB,CFR,CIF

Product Specifications

Prod Model:	50~220MVA, 11~110kV
Markets:	North America,South America,Eastern Europe,Southeast Asia,Africa,Oceania,Mid East,Eastern Asia,Western Europe
Manufacturer:	Pearl Electric Co., Ltd.
Capacity:	up to 200mva
Voltage Class:	up to 220kv
Reference Standard:	IEC 60076
Phase:	Three
Application:	Rectifier
Coil:	Core-type Transformer
Winding Type:	Separated Winding Transformer
Certification:	Kema CE
Cooling Method:	Customized

Product Description

1, Dry-type Transformer:
1. Low loss,low noise,low partial discharge and high reliability
2. Excellent dynamic thermal stability and high anti-lightning impulse capability.
3. Epoxy resin pressure casting technology is adopted for HV coils,resulting in much excellent performance.
4. Simulation analysis is carried out for core mould designing,to avoid cavity resonance and reduce noise level greatly. Lightning impulse wave simulation calculation and analysis are carried for the HV coils,thus to improve transformer's anti-lightning impulse capability.

2, Oil-immersed Transformer
1. Low loss, low noise and high reliability.
2. Excellent dynamic thermal stability and high over-load capacity.
3. Simulation analysis was carried out for the core mould design, thus to greatly reduce noise level. Simulated lightning impulse wave process was carried out for HV winding mould design, thus to greatly improve product's anti-lightning impulse capability.

3, Pad-mounted Transformer

Pad-mounted transformer is the complete set of power transformation and distribution equipment that has the active part, HV load switchgear, protective fuse and HV&LV connections installed in a common hermetically sealed tank.

4, 110kV Power Transformer

The 110kV series low-loss transformer manufactured by Pearl with "Pearl" brand is the latest 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.

5, Amorphous Alloy Dry-type Transformer

Amorphous alloy is a new type of material with high magnetic conductivity and energy-saving performance. With the rapid quenching solidification production process, the metal atoms are disordered and arranged in non-crystal way. It is different from the crystal structure of tradition silicon steel and is much easier to be magnetized and demagnetized. Typical amorphous alloy steel sheet contains 80% iron, while the other ingredients are boron and silicon. The thickness of amorphous alloy steel sheet is very small, only 20 to 30um, less than 1/10 thickness of traditional silicon steel sheet.

6, Amorphous Alloy Oil-immersed Power Transformer

Amorphous alloy is a new type of material with high magnetic conductivity and energy-saving performance. With the rapid quenching solidification production process, the metal atoms are disordered and arranged in non-crystal way. It is different from the crystal structure of tradition silicon steel and is much easier to be magnetized and demagnetized. Typical amorphous alloy steel sheet contains 80% iron, while the other ingredients are boron and silicon. The thickness of amorphous alloy steel sheet is very small, only 20 to 30um, less than 1/10 thickness of traditional silicon steel sheet. The characteristics of amorphous alloy core are as follows: high saturation magnetic induction intensity, low-loss (20% ~ 30% of traditional silicon steel sheet), low coercive force, low excitation current and high thermal-stability.

7, Pad-mounted Transformer for Wind Farm

With the global requirements for energy becoming more and more pressing, traditional energy resources such as coal, petroleum and natural gas being consumed at higher and higher rate, human paying more and more attentions to environment protection and technology changing quickly along with each passing day, the newly emerging wind power electricity, as a type of reproducible resource, gains rapid development and becomes a new main force among the newly built power plant.

Generals
The oil-immersed 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.:	22, 33, 66, 88, 121, 145, 220kV or customize
Vector Group	YNd11, Dyn11 or customized
Rated L.V.:	6.3 (6.6, 10.5, 11)kV or custoized
Capacity:	up to 200MVA
No-load Loss:	Customized for each type
Load Loss	Customized for each type
No-load Current:	Customized for each type
Impedance Voltage:	10.5% or Customized for each type
Tap-changing	On-load Tap-changing or 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.