30kVA to 2500kVA Cast Resin Dry Type Power Distribution Transformer
Three Phase Dry Type Transformer Information
♥ Passed UL certification, the coil adopts special technology to enhance its ability to resist salt spray and moisture, and improve operational reliability. all metal parts reach the anti-corrosion level of C4 and above, and have strong adaptability to the offshore environment.
♥ It has low loss, low noise, small size, light weight, no pollution, maintenance-free, flame retardant and fireproof, and can be installed in load centers to save investment costs.
♥ Temperature control device:
The transformer adopts the BWDK series signal thermometer. The temperature measuring element is embedded in the upper half of the low-voltage coil, which can automatically detect and display the respective working temperature of the phase coil, and has the function of over temperature alarm and trip.
♥ All the accessories you need to customize our products to your needs.
The casing is made from bolts on a steel plate with removable panels for attachment and tape. Depending on the application and your requirements, the surface treatment can be galvanized, painted.
The design is optimized to ensure the required cooling of the transformer at all levels of protection. The enclosure can be shipped assembled on the transformer or flat packed for on-site assembly.
Other Accessories
cooling fan.
Temperature monitoring unit (thermal control system)
1.Three leg core:Made of grain oriendted low loss electrolami nations insulated on both sides.
2.Resilient spacers:To insulate core and windings from mechanical vibrations,resulting in low noise emissions.
3.HV winding:Consisting of vacuum potted single foil type aluminum or copper coils.
4.LV winding:Made of copper or aluminum strip.Turns firmly glued together by means of insulating sheet wrapper material.
5.Insulation:Mixture of epoxy resin and quatrz powder.Makes the transformer maintenance free,moistureproof,tropicalized,flame resistant and self extinguishing.
6.Clamping frame and truck:Rollers can be swung around for lengthways or sideways travel.
7.LV terminals:
Normal arrangement:top,rear.
Special version:Bottom,available on request at extra charge.
8.HV terminals:Variable arrangerments,for optimal station design.HV tapping links on low voltage side for adjust ment to system conditions,reconnectable in deenergized state.
9.Cross flow fans:Permitting a 50% increase in the rated power.
Temperature monitoring
By PTC thermitor detectors in the LV winding
Paint finish on steel parts
Multiple coating,RAL 5009.On request:Two component varnish or hot dip galvanizing(for particularly aggressive environments)
Ambient class E2
Climatic category C2 (if the transformer is installed outdoors,degree of protection IP 23 must beassured)
Fire class F1
♥ Part Product Information
| Rated Capacity(kVA) |
Voltage Combined |
Vector-group |
No-load Loss(W) |
75ºC
Load Loss(W) |
No-load current(%) |
Short-circuit Impendance(%) |
| High voltage(KV) |
Tapping Ranges |
Low voltage(KV) |
| 30 |
6
6.3
6.6
10
10.5
11 |
±5%
±2×2.5% |
0.4 |
Dyn11
Yyn0 |
190 |
710 |
2.4 |
4 |
| 50 |
270 |
1000 |
2.4 |
| 80 |
370 |
1380 |
1.8 |
| 100 |
400 |
1570 |
1.8 |
| 125 |
470 |
1850 |
1.6 |
| 160 |
540 |
2130 |
1.6 |
| 200 |
620 |
2530 |
1.4 |
| 250 |
720 |
2760 |
1.4 |
| 315 |
880 |
3470 |
1.2 |
| 400 |
980 |
2990 |
1.2 |
| 500 |
1160 |
4880 |
1.2 |
| 630 |
1340 |
5880 |
1.0 |
| 630 |
1300 |
5960 |
1.0 |
6 |
| 800 |
1520 |
6960 |
1.0 |
| 1000 |
1770 |
8130 |
1.0 |
| 1250 |
2090 |
9690 |
1.0 |
| 1600 |
2450 |
11730 |
1.0 |
| 2000 |
6050 |
14450 |
0.8 |
| 2500 |
3600 |
17170 |
0.8 |
| 1600 |
2450 |
12960 |
1.0 |
8 |
| 2000 |
3050 |
15960 |
0.8 |
| 2500 |
3600 |
18890 |
0.8 |
♥♥Design Products for Customer Needs♥♥
Yixin Electric Power Equipment has more than 50 engineering and technical personnel, more than 1000 employees, covering an area of 240, 000 square meters. Whether in terms of design talent or production experience, our company is one of your best choices.
★Design and Engineering
- Specification Development: The process begins with understanding the customer's requirements, including the desired voltage, capacity, and environmental conditions.
- Electrical Design: Engineers design the electrical aspects, including the core, windings, insulation, and cooling system.
- Mechanical Design: Simultaneously, mechanical aspects like the enclosure, tank, and mounting features are designed to ensure they can withstand environmental and operational stresses.
★Material Selection and Procurement
Due to our rich experience in production and manufacturing for power transformer, we have a wealth of selection advantages and price advantages in the selection of raw materials and suppliers. The quality and price of the products are advantages for us.
- Core Material: Grain-oriented electrical steel is typically selected for the transformer core due to its high magnetic permeability.
- Copper/Aluminum Windings: High-conductivity copper or aluminum is chosen for the windings.
- Insulation Materials: Insulating paper, pressboard, and varnishes are selected based on their dielectric properties.
- Tank and Enclosure: The materials for the tank and enclosure (usually steel) are selected for durability and corrosion resistance
★Core Construction
In order to assure the implementation ofthe advance design and manufactural tech-nology,some key equipments,moulds andtools had been repleced,moulds andimprovedwith the new technologies to meetthe requrements of product quality.
- Core Cutting: The steel sheets are cut into specific shapes and sizes according to the design.
- Core Assembly: These sheets are stacked together to form the transformer core, usually in a step-lap formation to minimize losses.
★Winding Process
- Winding Design: The windings are designed based on the voltage and current requirements.
- Winding Construction: The copper or aluminum wires are wound around the core using precision machines to create the primary and secondary windings.
- Insulation: Each layer of winding is insulated to prevent short circuits and ensure proper electrical isolation.
Foil Winding Machine
Automatic Coil Winding Machine
Horizontal Coil Winding Machine
Vertical Coil Winding Machine
★Assembly
- Core and Coil Assembly: The windings are placed around the core, and the entire assembly is secured in place.
- Tank Assembly: The core-coil assembly is placed into the transformer tank, and connections are made for input and output terminals.
- Filling with Insulating Fluid: The tank is filled with an insulating fluid, typically mineral oil, to provide cooling and electrical insulation.
★Vacuum Drying
The transformer is placed in a vacuum oven to remove any moisture trapped in the insulation and the insulating fluid. This step is crucial for ensuring the longevity and reliability of the transformer.
★Sealing and Painting
- Sealing: After vacuum drying, the tank is sealed to prevent any leakage of insulating fluid.
- Painting: The exterior of the transformer is painted to protect it from environmental factors like moisture, dust, and UV radiation.
★Testing
- Electrical Testing: The transformer undergoes various electrical tests, including voltage tests, insulation resistance tests, and short-circuit tests, to ensure it meets all specifications and standards.
- Leakage Testing: The transformer is checked for any leaks in the tank or bushings.
- Final Inspection: A thorough final inspection is conducted to ensure all components are properly assembled and functioning.
- Transformer ratio and connection
Measurement of load losses and short circuit impedance.
Measurement of no-load losses.
Separate source withstand voltage test
Induced over-voltage test
Temperature rise test
Lighting impulse withstand voltage test
Measurement of partial discharge
Other transformers like rectifier transformer are also available on request.
★Quality Assurance
A quality control team reviews all test data and inspections to ensure the transformer meets all regulatory and customer-specific requirements.
★Packaging and Shipping
- Packaging: The transformer is carefully packaged to prevent damage during transport.
- Shipping: It is then shipped to the customer or the installation site.
Our company has a relatively strong production capacity and efficient marketing team.Products include 110KV,220KV large ultra-high voltage transformers and 35KV below various dry transformers,oil-immersed transformers,amorphous alloy transformers,pre-installed substation and various specifications of box transformer,furnace transformer,rectifier transformer,mining transformer and other special transformers.All products of the company have passed the routine,type and special tests of the National Transformer Quality Supervision and inspection Center and wuhan High Voltage Research Institute of the State Electric Power Corporation.The enterprise has passed IS09001:2015 quality management system certification;Jiangsu province enterprise measurement certification;At the same time,10KV,35KV class power transformers,box substation and the adoption of IEC certification.Product sales cover the national market,but also exported to Australia,New Zealand,India,Madagascar,Vietnam and other countries and regions.
1.Who are we?
We are transformer company, based in Jiangsu, China, start from 1992,sell to Domestic Market(80.00%),Southeast Asia(20.00%). There are all about 1200-1500 people in our company.
2.How can we guarantee quality?
Always make a final Inspection before shipping.
3.What can you buy from us?
110kV-220kV Oil-immersed Power Transformer,Dry-type Transformer,Unpacked H Grade Dry Transformer,Oil-immersed Distribution Transformer, Pad-mounted Transformer,Enameled Wire,Composite Wire,Transposed Wire,Paper Covered Wire,Film Wrapped Wire.
4.Why should you buy from us not from other suppliers?
As an enterprise specializing in transformer production for 31 years, we have high quality, fast delivery, guarantee after-sales service and factory price. What's more, we have ISO9001-2008, OHSAS 18001:2007, ISO4001:2004L ,UL ,CE certificates and IEC, ANSI, KEMA, GOST standard.
5.What services can we provide?
Accepted Delivery Terms: FOB,CIF,EXW; Accepted Payment Currency:USD,CNY; Accepted Payment Type: T/T,L/C; Language Spoken:English,Chinese.
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