Advanced 33kv Oil-Immersed Transformer for Enhanced Energy Management
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Product Highlights
- Fully Sealed Design: Cancels oil conservator; corrugated tank adjusts oil volume automatically to prevent deterioration and reduce maintenance.
- High Efficiency & Low Loss: Achieves good energy-saving effect with low noise and high efficiency, reducing pollution compared to ordinary transformers.
- Customizable Specifications: Rated voltage, frequency (50/60Hz), and connection groups (Dyn11/Yyn0) can be customized according to customer requirements.
- Comprehensive Certifications: Complies with IEC standards and holds CE, ISO9001, CCC, and Type Test Report certificates for quality assurance.
- Robust Safety Features: Equipped with Buchholz relay, pressure relief device, and thermal relay to prevent explosions and monitor temperature/oil levels.
- Versatile Application: Suitable for power stations, mines, hospitals, airports, tunnels, and chemical plants in outdoor environments up to 1000m altitude.
- Professional After-Sales Support: Provides online installation assistance, solutions within one working day for issues, and regular technician visits for long-term reliability.
- Trusted Manufacturer: Established in 2011 with 71 utility model patents and 15 invention patents, exporting to over 40 countries globally.
Product Attributes
- Customization
- Available
- Application
- Power, Lighting
- Phase
- Three
- Core
- Core-type Transformer
- Cooling Method
- Oil-immersed Type Transformer
- Winding Type
- Two-winding Transformer
- Certification
- ISO9001-2000, ISO9001, CCC, CE
- Usage
- Power Transformer, Distribution Transformer
- Frequency Characteristics
- Power Frequency
- Shape of Core
- Ring
- Brand
- Tsty
- Product Name
- Oil Immersed Transformer
- Type
- Oil-Filled Transformer
- Material
- Copper / Aluminium
- Standard
- IEC / GB
- Transformer Type
- S11 Oil-Immersed Transformer
- Vector Group
- Dyn11 / Yyn0
- Warranty
- 2 Years
- Package
- Wooden Case
- Frequency
- 50/60Hz
- Coil Material
- Aluminum/Copper
- Connection Group
- Yyn0/Dyn11
- Transport Package
- Wooden Case or Pallet
- Specification
- IEC/ANSI/IEEE
- Trademark
- TSTY
- Origin
- China
- HS Code
- 8504220000
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Product Description
S9-M Series 33kv Oil Immersed Distribution Transformer
| Number of Phase | Three Phase |
| Winding Type | Two Winding |
| Rated Capacity | 200kVA |
| High Voltage | 10/11kV |
| Low Voltage | 0.4kV |
| Tapping Range | ±2x2.5% |
| Impedance Voltage | 4% |
| Load Loss | 2.73/2.6kW |
| No-load Loss | 0.34kW |
| No-load Current | 1.0% |
| Frequency | 50/60Hz |
| Connection Group | Yyn0/Dyn11 |
| Cooling Method | ONAN |
| Coil Material | Aluminum/Copper |
| Size | 1240x780x1360mm |
| Weight | 910kg |
The fully sealed oil-immersed power transformer developed by TSTY has the advantage of low loss, low noise and high efficiency, which can achieve good energy-saving effect and reduce pollution. Compared with the ordinary oil immersed transformer, the fully sealed transformer cancels the oil conservator, and the change of oil volume is automatically adjusted and compensated by the elasticity of the corrugated sheet of the corrugated oil tank. The transformer is isolated from the air, so as to prevent and slow down the deterioration of oil and insulation aging, enhance the operation reliability, and avoid maintenance in normal operation.
Mainly Components:
The mainly parts of this transformer include Oil Tank, Conservator, Buchholz Relay, Breather Unit, Oil Indicator, Temperature Detector, Pressure Relief Device, Thermal Relay, Radiator, and Bushing.
1. The oil tank is used to soak the windings by placing it in.
2. Comply with IEC standards with CE/ISO certificates
3. be easily contacted & enlarge throughout loading so that the temperature of the oil can be increased and decrease.
4. Buchholz relay is used when a conservator tank is used. Because it indicates errors like loss of oil once it goes low, improper flow of oil between the tank & transformer.
5. Breather Unit includes silica gel that absorbs moisture in the oil. It changes its color from blue color to pink color it is not capable to absorb moisture in the oil.
6. The oil indicator indicates the level of the oil within the conservatory unit.
7. The temperature detector monitors the temperature of the oil. If the temperature of the oil increases to a certain level then the transformer will be disconnected from the service.
8. Pressure relief device decreases the pressure within the transformer to avoid an explosion of the transformer.
9. Thermal relay is used as an indicator for the temperature of the winding
10. Full galvanized coating no rust
11. The bushing is used to connect the internal windings of the transformer with the help of an exterior electrical network.

1.Device types: outdoor type
2.Type of Voltage Regulation: Off-circuit or On-Ioad
3.Tapping Range: ±5 % ±2x2.5 % ±4x2.5 %
4.Frequency: 50Hz or 60Hz
5.Phases: Three or single
6.Connection Symbol: Dyn11,Yyn0 ( or as requested)
7.Short- circuit Impedance: Standard Impedance
8.Altiude is not exceeding 1000m,ambient temperature not exceeding 40OC. If it can't meet such conditions,we will modulate parameters in accordance with standard.
Waste incineration project,three gorges dam project,zhuhai-hong kong-macao bridge,state grid corporation,coal mine,photovoltaic project Power stations,compact transformer station, normal industrial factories , mines , hospitals, buildings, airports, tunnels, chemical plants, nuclear power plants etc.and so on.

1.Our company provides you with project design and process design, and designs and manufactures products according to your equipment purchase plan and specific needs. And train technical and operating personnel for you.
2.The newly purchased products are provided with online assistance for installation and debugging. The products are under the lifelong service system. If problems occur in normal use, we will provide solutions within one working day after receiving user's feedback. We will try our best to get the product up and running as soon as possible. And there are regular visits by professional technicians to ensure the long-term, safe and reliable use of our products.
3.We use quality authentic materials, process and manufacture in strict compliance with ISO9001:2000 international quality management to ensure the quality of excellence and the smooth installation!

TSTY Electric Co., Ltd. was established in 2011 and is an excellent and reliable transformer manufacturer in China. The company mainly develops and produces oil-immersed transformers, dry-type transformers, box-type substations and high and low voltage complete sets of equipment.
The equipment put into production and operation of the project advocates energy saving, intelligence, information and mechanization. The company has established the Henan Triangle Energy-saving Transformer Engineering Technology Research Center,with 71 utility model patents and 15 invention patents.
With years of accumulation in the transformer industry and strong technological innovation capabilities, TSTY Products are sold to the Middle East, North America, South America, Europe, Southeast Asia, Africa and other regions, covering more than 40 countries. 




FAQ
Q: Who are we?
A:We are a big professional manufacturer of oil immersed transformer, dry type transformer, transformer substation,HV and LV switchgear, established in 2011 year .
Q: Why should you buy from us not from other suppliers?
A:As an enterprise specializing in transformer production for 12 years. ISO9001-2008, OHSAS 18001:2007, ISO4001:2004L .CE,CCC,TYPE TEST REPORT,etc certificates
Q: How do transformers been shipped?
A: Transformers always been delivered by ship,train or truck for oversea,which with main active body in bulk and accessories in wooden cases.
Q: Can your product be customerized?
A: Considering differences in voltage, frequency and other speciality of transformer product in different countries and
regions,our product can be customerized according to your requirements.
Q: Do you offer guarantee for the products?
A: Yes. We offer at least two years guarantee for all of our transformers.
Q: Do you accept FAT(Factory Acceptance Test)?
A: Yes. It's available. We are responsible for each set transformer's testing.
Q: Do you assign engineer for after-sale service?
A: Yes. For our products,we all show after-sale guide installation adn question inquiry.
About the Supplier
This supplier has been audited by BV. Verify the report on the official BV website with ID "MIC-ASR269654". Items marked "" are certified.
Company Profile
TSTY Electric Co., Ltd. Was established in 2011 and is located in Jiaxian County, Henan Province. It is a digital management enterprise integrating R&D, production, sales and installation of power equipment. The company's products cover 6kv, 11kv, 22kv, 35kv, 220kv, etc. Power transformers, distribution transformers, box-type substations, high and low voltage switchgear, wind power, photovoltaic power generation equipment, etc.
At present, the company has three factory areas including dry transformer workshop, oil transformer workshop and intelligent complete workshop, with a construction area of 250, 000 square meters, 600 employees, and 180 invention patents. The technical performance of the products has reached the advanced level in the same industry in the world, and the quality is safe and reliable. The products have passed UL, IEC, SGS, GOST, CCC, CE and other international certifications. TSTY has many types of power distribution equipment, adopts new manufacturing technology, has the characteristics of low loss, low noise, easy installation, energy saving and emission reduction, and long service life; The product production cycle is short, easy to install, and fast delivery. Our team consists of very professional engineers, we strive to deliver your power equipment on time and within budget with excellent product quality to give you the ultimate experience.
TSTY Products are sold to the Middle East, North America, South America, Europe, Southeast Asia, Africa and other regions, covering more than 80 countries. The equipment put into operation in the project advocates energy saving, intelligence, informatization, and mechanization. TSTY relies on years of experience in the power equipment industry Accumulation, and strong technological innovation capabilities, are committed to providing comprehensive solutions for the international power industry.
Facing the future, TSTY will take "Let green electricity change the world" as its mission. With the vision of "becoming a world-class electrical equipment manufacturer", Adhering to the enterprise spirit of integrity, innovation, unity and forging ahead, TSTY strives to become a world-class and domestic leading modern and intelligent enterprise.
About Our Factory & Business Background
-
Business Type
- Manufacturer/Factory & Trading Company
- Address
- Middle of Xingye Rd, Jiaxian Industrial Area, Pingdingshan Henan, Pingdingshan, Henan, China
-
Plant Area
- 26054 square meters
-
Number of Employees
- 513
-
Terms of Payment
- LC, T/T, PayPal, Western Union, Small-amount payment, D/P
-
International Commercial Terms(Incoterms)
- FOB, CIF, CFR, EXW
-
Average Lead Time
-
Peak Season Lead Time: one month
Off Season Lead Time: within 15 workdays -
Nearest Port
- Qingdao Port,
Our Production Capability & Technical Expertise
-
Main Products
- Oil Immersed Transformer, Dry Type Transformer, Transformer Substation, High and Low Voltage Switchgear
-
Production Machines
- Automatic laminating machine, Automatic Winding Machine, Vacuum drying Oven, Vacuum Oil Filling Machine
-
ODM Service Available
- Yes
-
OEM Service Available
- Yes
-
Own Brand
- Yes
Our Industry Experience & Global Business Record
-
Year of Establishment
- 2011-01-12
- Export Year
- 2020-06-01
-
Main Markets
- South America, Europe, Africa
-
Number of Foreign Trading Staff
- 50
-
Overseas Agent/Branch
- Yes
Our Certifications, Standards & Industry Recognition
-
Product Certification
- CE, UL, Others
FAQ
- What is the warranty period for the transformer?
- We offer a minimum two-year guarantee for all our transformers, along with a lifelong service system.
- Can the transformer specifications be customized?
- Yes, we can customize voltage, frequency, and other special requirements according to your specific needs and regional standards.
- What certifications does the product hold?
- Our transformers comply with IEC standards and hold CE, ISO9001, CCC, and Type Test Report certificates.
- How are the transformers shipped overseas?
- Transformers are delivered by ship, train, or truck, with the main active body shipped in bulk and accessories packed in wooden cases.
- Do you accept Factory Acceptance Tests (FAT)?
- Yes, FAT is available. We are responsible for testing each set of transformers before delivery.
- What after-sales services are provided?
- We provide online installation guidance, solutions within one working day for any issues, and regular visits by professional technicians.
- What is the lead time for production?
- The lead time is within one month during peak season and within 15 working days during the off-season.
- What are the main components of the transformer?
- Main components include the oil tank, conservator, Buchholz relay, breather unit, oil indicator, temperature detector, and bushings.
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