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Custom Power Transformers Solutions≤2500 kVA
Product parameters
|
Type |
Capacity |
Voltage Level |
Cooling |
Application |
|
Distribution Transformer |
1,600 kVA |
11 kV / 400 V |
ONAN |
Residential/industrial |
|
Power Transformer |
500 MVA |
220 kV / 33 kV |
OFAF |
Regional transmission hub |
|
UHVDC Converter Transformer |
±400 kV / 500 MVA |
±800 kV HVDC |
Forced oil |
Intercontinental grids |
|
Rectifier Transformer |
20 MVA |
33 kV / 1.8 kV × 6-pulse |
Dry-type, air-cooled |
Aluminum electrolysis |
product description
1. Rated Capacity (MVA/kVA)
Definition: Maximum continuous power output the transformer can deliver.
Typical Range:
Distribution Transformers: ≤2,500 kVA (e.g., residential or industrial terminal distribution).
Power Transformers: Thousands of kVA to several GVA (e.g., transmission substations).
Ultra-High Voltage (UHV) Transformers: For grid interconnection or industrial use, up to ±800 kV HVDC converter transformers.
2. Voltage Rating
Input/Output Voltages:
High Voltage (HV): Typically 33 kV to ±1,100 kV (e.g., transmission networks).
Medium Voltage (MV): Common 11 kV, 22 kV, 33 kV.
Low Voltage (LV): Usually 400 V or 6.6 kV (distribution to end-users).
Special Applications:
Rectifier Transformers: For metallurgy/chemicals, voltages up to 30 kV+.
Railway Traction Transformers: Adapted for locomotive power, e.g., 27.5 kV or 1×25 kV.
3. Frequency
Standard: 50 Hz (China/Europe) or 60 Hz (North America).
Special Frequencies: 400 Hz for aviation/marine applications.
4. Cooling System
Oil-Immersed:
ONAN (Oil Natural Air Natural): Natural convection cooling.
ONAF (Oil Natural Air Forced): Forced air cooling for higher efficiency.
Dry-Type: Air-cooled, suitable for indoor/fire-sensitive areas (e.g., data centers).
Gas-Insulated (GIS): SF6 gas insulation, compact design for high-density substations.
5. Insulation Type
Oil-Immersed: Mineral oil or ester-based oils (environmentally friendly).
Dry-Type: Epoxy resin casting or Nomex paper insulation (fire/explosion-proof).
Gas-Insulated: SF6 or mixed gases (high-voltage compact substations).
6. Efficiency
Typical Values:
Distribution Transformers: ≥98% (low no-load and load losses).
Power Transformers: ≥99% (ultra-high voltage models achieve even higher efficiency).
Standards: Comply with IEC 61620 or IEEE C57.12 (e.g., EU Ecodesign requirements).
7. Connection Group
Phase Difference: Identified as Dyn11, Yd11, indicating phase relationships between windings to manage harmonics and short-circuit currents.
8. Impedance Voltage
Definition: Percentage voltage drop during short-circuit testing, reflecting short-circuit withstand capability.
Typical Values: 4–10% (power transformers), ≤4% (distribution transformers).
9. Temperature Rise
Limits: Oil-immersed transformers typically allow ≤55 K temperature rise (top oil at 40°C ambient).
Environmental Adaptation: Desert regions require higher derating.
10. Protection Rating
IP Codes:
IP23: Dust-protected, water-resistant spray.
IP66/IP68: Fully sealed against dust/water (marine/offshore applications).
Special Environments: Salt spray corrosion resistance for coastal/subsea use.
11. Specialized Types
Rectifier Transformers: Multi-pulse designs (e.g., 12/24-pulse) to minimize harmonics.
Tap-Changing Transformers: On-load tap changers (OLTC) for voltage regulation.
Specialty Transformers:
Electric Furnace Transformers: Designed for short-term overload (e.g., steel smelting).
Zigzag Transformers: Neutral grounding systems for harmonic suppression.
Type Capacity Voltage Level Cooling Application
Distribution Transformer 1,600 kVA 11 kV / 400 V ONAN Residential/industrial
Power Transformer 500 MVA 220 kV / 33 kV OFAF Regional transmission hub
UHVDC Converter Transformer ±400 kV / 500 MVA ±800 kV HVDC Forced oil Intercontinental grids
Rectifier Transformer 20 MVA 33 kV / 1.8 kV × 6-pulse Dry-type, air-cooled Aluminum electrolysis
Why choose us
JIEZOU POWER, a professional designer, manufacturer and installer of power system solution around the World, was founded in 1989 year, occupies 200,000 square meter.
JIEZOU POWER, mainly manages power grid projects, 500KV EPC, 230KV hydroelectric power plant, 115KV power substation, etc.
JIEZOU POWER factory can manufacture oil type and dry type distribution transformer, max 500KV 480MVA power transformer, GIS, switchgear, substation, based on ANSI/IEEE/DOE2016/CSA/IEC60076 standard.
JIEZOU POWER successively obtain ISO9001, ISO14001, ISO45001,UL, CUL, CSA certificate, SGS, TUV,INTERTEK, TYPE TEST REPORT. Until 2023 year, worldwide branch companies and factories are distributed in United States, Canada, Dubai, Dominican Republic, Philippines, Chinese branch factories and companies are in BengBu city, FengYang city, HaiAn city, TaiZhou city, SuZhou city, ShenYang city, FoShan city.
Looking into the future, JIEZOU POWER's vision is to be the most trusted power system solution provider, solve the World's most urgent power management challenges, accelerate the planet's transition to renewable energy. So that everyone can have a more low-carbon and bright life. To this end. we will do our utmost to make efforts.
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