Innovative Transformer Manufacturing: Compact Design for Power Efficiency

• Customization: Available
• Application: Power, Electronic, Instrument, Lighting
• Phase: Three
• Model NO.: S11
• Cooling Method: Dry-type Transformer
• Winding Type: Separated Winding Transformer
• Certification: ISO9001-2000, ISO9001, CCC
• Usage: Single-phase Transformer, Rectifier Transformer, Power Transformer, Distribution Transformer
• Frequency Characteristics: Power Frequency
• Shape of Core: OD
• OEM: Avaliable
• Transport Package: Export Wooden Case Packing
• Specification: 2400*800*1900
• Trademark: GANGKONG
• Origin: China
• HS Code: 8504210000
• Production Capacity: 35000pieces/Years

Product Description

Product Category: DRY TYPE TRANSFORMER

Key Attribute: SPECIFICATION

1. Product Description

Experience a paradigm shift in power technology with our SCB epoxy resin dry type transformers. These transformers redefine safety, reliability, and energy efficiency while ensuring minimal maintenance. Designed for economic viability and unmatched safety, this series promises a transformative approach to power management. Meticulously crafted for versatility, these transformers excel in a multitude of environments, adapting seamlessly to diverse conditions and applications.
Our transformers boast an avant-garde design and a rigorous manufacturing process, culminating in impeccable testing. The HV winding is meticulously crafted using 99.9% pure oxygen-free copper conductor, compounded with epoxy network cloth and resin. The LV winding utilizes 99.9% oxygen-free copper foil, while the iron core is comprised of premium, high-permeability cold rolled silicon steel sheets, strategically bound for perfection. This intricate construction endows the product with formidable mechanical and electrical strength, along with superior heat dissipation capabilities, ensuring small local discharge. Exuding exceptional reliability, these transformers promise an extended operational lifespan, resistance to moisture absorption, and a suite of protection features including flame retardancy, explosion proofing, and pollution-free operation. Their lightweight and compact nature, coupled with automatic temperature control, translates to significant savings in installation space, maintenance costs, and energy consumption. Ideal for penetrating deeply into the load center,they find their niche in urban construction projects, soaring high-rises, bustling commercial hubs, serene residential areas, vibrant entertainment complexes, and essential service centers like hospitals and airports. These transformers are equally at home in ports, railway stations, subways, and highway tunnels, providing robust solutions for civil air defense facilities, petrochemical ventures, electrical enterprises, the food processing sector, sewage treatment plants, offshore oil platforms, and mines.




2. The use of environmental and working conditions
2.1 The installation site elevation must not surpass 1000 meters, with ambient temperatures staying withina maximum of 40°C. Surpassing these parameters necessitates special design considerations.
2.2 Operational environments can accommodate up to 100% relative humidity, with temperature thresholds ranging from +40ºC to -25ºC, the latter with essential on-load switch and temperature controller installations.
2.3 Generally suited for indoor settings, the installation area must be free of electrical dust and corrosive gases, ensuring optimal ventilation. In cases where these conditions aren't met, particularly in basements or low-ventilation areas, forced ventilation should be implemented, requiring approximately 3-4 m³/min of airflow for each1kW loss, comprising both no-load and load losses.
2.4 Upon installation, maintain a minimum clearance of 800mm from walls and other obstacles,and ensure a 300mm gap between adjacent transformers. Adjustments can be made when installation spaces, such as distribution boxes, impose constraints.
2.5 Typically, the transformer can be directly positioned at the intended site, ready for operation following installation and inspection. For installations demanding shock resistance or meeting special criteria, mount the transformer on a secure foundation with appropriate bolt and nut fastenings.

3. Main specifications and technical parameters
3.1 Rated frequency:50Hz
3.2 Cooling method: AN or customizable to user preferences.
3.3 Shell protection level: IP20 or adaptable to user requirements.
3.4 Connection Group label: DynIl or tailored according to user needs.
3.5 Transformer phase sequence: From the high voltage side, observe from left to right for sequences ABC on the high voltage and abc on the low voltage.
3.6 Winding insulation class: Crafted to F class specifications.
3.7 Insulation Level
Our top-tier line of transformers is engineered to deliver exceptional performance across varying voltage levels. For our 10kv products, they are designed to withstand a power frequency voltage of 35kv and an impact voltage of up to 75kv. The 20kv product line showcases its resilience with a power frequency voltage endurance of 55kv and an impact voltage capacity of 125kv. Meanwhile, the robust 35kv products are crafted to endure a power frequency voltage of 70kv and an impressive impact voltage of 170kv.
3.8 Temperature Rise Limit: Discover the standard for excellence in thermal management.
Our advanced transformers are equipped with an insulation system that can withstand temperatures up to 155°C, ensuring durability and reliability. The maximum allowed temperature rise is 100k, setting new benchmarks in efficiency and safety.









4. Discover the next section where unparalleled innovation meets precision engineering.

Product Parameters

SCB
Voltage class (KV)
Capacity (KVA)
Performance Level Code
The low-voltage coil features a copper foil wound with epoxy resin pouring, showcasing advanced engineering.
Three-phase


5. Product System Description
5.1 Temperature Display and Temperature Control System
Tailored to user requirements, this product can include a state-of-the-art temperature display and control system designed to perform the following: (1) Trigger an overload alarm signal and automatically display the temperature for enhanced safety.
(2) If the coil's internal temperature surpasses the threshold set by the signal thermometer, the system can activate the fan, halt power supply, and disconnect the transformer, ensuring optimal protection.
5.2 Cooling System
The cooling method is highly efficient, utilizing air natural cooling (AN), guaranteeing full output capacity at 100%; with forced air circulation cooling (AF), enabling long-term overload of 25% and short-term overload of 50%, offering flexibility and reliability.
5.3 Protection Level
The standard protection level of this product is IP00, meaning the transformer lacks a protective shell. It is essential for indoor use; however, it can be equipped with a robust shell if required, it can be equipped with a shell,if users demand IP20 or IP23. Note that higher protection levels may necessitate reduced transformer capacity operation.
Note: An IP20 housing prevents intrusion of solid objects larger than 12mm, offering a safety barrier for live components. Enhanced to IP23, it also guards against water droplets entering a vertical line up to a 60° angle.


6. Product Packaging and Transportation
6.1 Products are categorized into two types: open type (without protective cover) and protected type (with protective shell), typically transported by railway, waterway, or highway. If needed, components can be partially disassembled for transportation (including on-load tap changers, temperature controllers, air cooling devices, protective covers, etc.), and packaged separately or transported as a whole. Use cranes, winches, or other suitable machinery for lifting and unloading.
6.2 During transportation, products must be shielded with waterproof covers to safeguard against rain damage.
6.3 When lifting boxed products, ropes should be attached to the sleepers at the bottom four corners. The packaged items can be elevated 100mm-150mm from the ground using a specialized lifting device, proceeding to full lifting upon ensuring no abnormalities.
6.4 During transportation, ensure that the route's slope does not exceed 15° to maintain load balance. The product's center of gravity should align with the vehicle's vertical center line. To prevent shifting and toppling, the long axis should match the transport direction, and the product should be securely fastened to the vehicle.
6.5 When loading and unloading vehicles not equipped with cranes, ensure strict adherence to safety technical requirements. Verify the lifting capacity matches the product's transportation weight, guaranteeing both security and efficiency during handling.
6.6 For products transported with a car, the base is equipped with rollers, which are typically removed to maintain stability during transit and reinstalled at the destination prior to installation. For trolley-equipped products, rotate the roller axle at both ends of the frame by 90° to facilitate seamless horizontal or vertical movement.
6.7 Upon reaching the destination, minimize the product's duration in transportation state, especially outdoors. Ideally, store it in a covered, dry, and ventilated area before installation. Implement measures to shield the product from potential mechanical damage and contamination.


7. Inspection and Acceptance
7.1 Upon receiving the product, promptly open the shell for a thorough inspection and acceptance. Verify the completeness of items listed in the packing list, ensure no damage occurred during transport, check for displaced or damaged parts, loose fasteners, insulation integrity, and cleanliness of the coil surface.
7.2 Confirm that the product nameplate data aligns with the user's specified product specifications, including capacity, voltage level, connection group label, and short-circuit impedance.
7.3 Verify the completeness of delivery technical documents.
7.4 If the product is not immediately put into operation post-unpacking, repackage it and store it securely indoors to prevent damage and theft.
7.5 During transformer acceptance, ensure a handover document is signed alongside the transportation department, documenting any issues identified during inspection.

8. Appearance Inspection Before Installation
8.1 After unpacking, remove any protective devices and inspect the product's external condition, focusing on the mechanical integrity and compression of the coil and core, as well as the tightness of the bolts on external connections.
8.2 Post-inspection, systematically tighten all fasteners and pressing components of the coil and iron core to eliminate any loosening.
8.3 Disassemble and reinstall the transformer body as directed by the factory technical conditions and accompanying complete assembly instructions.
8.4 Use dry compressed air or clean rags to thoroughly remove dust and dirt from the product.
8.5 If stored for extended periods, check for water beads or condensation on the transformer's surface, and conduct drying treatment until coil insulation resistance is satisfactory.

9. Inspection and Testing Before Operation
9.1 Measure the DC resistance of both high and low voltage windings, ensuring consistency with data provided in the factory test certificate.
9.2 Assess the reliability of the iron core grounding (typically located at the lower or upper iron yoke end), checking for stable grounding, absence of other body laps or multiple grounding points.
9.3 Test Insulation Resistance
(Voltage Level) 10kv 20kv 35kv
HV Coil to LV Coil The insulation resistance is a minimum of 500 MΩ, ensuring robust protection and safety. The insulation resistance is an impressive ≥ 800 MΩ, showcasing superior insulation quality. The insulation resistance meets or exceeds 1000 MΩ, offering unparalleled electrical safety.
The HV coil is securely grounded to ensure optimal safety. The resistance here is a solid ≥500 MΩ, reinforcing reliability. An outstanding insulation resistance of ≥800 MΩ is featured, emphasizing durability. Exceeding expectations with a resistance rating of ≥1000 MΩ.
The LV to Ground connection is designed for maximum security. The insulation resistance is ≥50MΩ, providing essential protection. An assured insulation resistance of ≥50MΩ is maintained. Ensuring a safe operational environment with resistance ≥50MΩ.
Core to ground connection is essential for maintaining system integrity. The grounding connection is meticulously engineered.A robust grounding configuration ensures system stability. A dependable resistance of ≥5MΩ guarantees basic protection. Offering a reliable resistance of ≥5MΩ for consistent performance. A steadfast resistance rating of ≥5MΩ is provided for security.
9.4 During external construction frequency voltage resistance testing, it is critical to pay close attention to carefully remove the temperature control probe wire from the coil. This precaution prevents potential breakdown of the thermostat's internal components.
9.5 Verify that the protection system is functioning normally to ensure safety and reliability.
9.6 Install the transformer ensuring at least 800mm clearance from walls and any obstructions that could hinder heat dissipation. After installation, securely link the ground bolt to the general ground loop for effective grounding.

10, Network operation
10.1 Once the protection device and monitoring system are verified and grounded, initiate transformer operation with no-load. Conduct three shock closings, then meticulously check and adjust the protection system.
10.2 Upon delivery, connect the voltage regulation tap position on the HV side to its rated position. During operation, adjust the voltage by following the tapping voltage indicated on the product nameplate. This should be done only when the transformer power supply is disconnected to ensure safety.
10.3 Equipped with a BWDK series temperature controller, the transformer features temperature sensors located at the upper end of the low-voltage coil. This system automatically detects and displays the working temperature of each phase coil. When set temperatures are reached, it automatically manages the fan operation and initiates alarms or trips. Users can adjust settings according to the thermostat manual for optimal functionality.

11. Maintenance
After a period of operation, it is imperative to disconnect the dry transformer and conduct necessary inspections and maintenance.
11.1 Conduct a thorough check of the coil, iron core, wire sealing, tap-connecting terminals, and fasteners for any signs of damage, deformation, discoloration, overheating, or corrosion. Promptly address any anomalies by assessing operational damage and implementing corrective measures.
11.2 Clean dust off the transformer diligently. Use a dry cloth for accessible areas, and avoid volatile cleaners. For hard-to-reach places within the iron core coil, employ compressed air to ensure cleanliness.
11.3 If the transformer is equipped with a fan, ensure to remove dust and debris from the fan. Exercise caution to prevent fan blade deformation. Also, inspect the fan bearing grease, replenishing or replacing it as necessary for optimal performance.
11.4 After completing inspection and maintenance, ensure a meticulous examination is conducted before reintegrating the transformer into operation. Scrutinize the coil, iron core, and insulation components thoroughly to confirm the absence of any metal or non-metal foreign objects.


12. Security Matters
12.1 Ensure the power supply for the temperature controller and fan is routed through the switch panel, avoiding direct connections to the transformer. 12.2 Prior to the initiation of transformer operation, it is imperative to conduct a rigorous verification of the grounding system in the transformer room.
12.3 Securely close the door of the transformer casing to guarantee electrical safety.
12.4 Implement protective measures in the transformer room to deter small animals from entering, thereby preventing potential accidents.
12.5 Personnel entering the transformer room must wear insulated footwear, maintain a safe distance from live components, and refrain from touching the transformer.
12.6 If there is a sudden increase in transformer noise, immediately monitor the load and grid voltage conditions. Vigilantly observe any fluctuations in temperature and consult with relevant personnel promptly for advice.
12.7 Conduct a comprehensive transformer check every 3-5 years. During this period, it is also advisable to perform preventive testing to ensure optimal performance.
12.8 Only qualified professionals are authorized to undertake the installation, testing, operation, and maintenance of transformers.

Certifications

FAQ

Are you the manufacturer or trader?

GANG KONG is a leading & professional manufacturer located in Zhejiangprovince of China.

What is your main markets?

Our main market is in home & a half in South-East Asia, Middle East,West-AfricaEast-European countries & Some South America..etc

What is your delivery & after-sales serive?

The delivery is according to order gty, normally for containers order we need 1month. Per each month 20 containers (20'ft or 40'ft)are no problem for us . Wecan answer user's question and solve their problem in 24 hrs per each day andgive full technical support in time to all of our products.

Do you accept OEM and ODM?

Yes. Our R & D team owns latest technology ,can develop & produce products ascustomers' drawing & under their brand

What is your payment terms?

a. 30% T/T in advance as deposit ,balanced against the shipping documents

b. irrevocable L/C at sight for order which amount is over 100 thousand USD

C. for old business partner,we can negociate together for other special terms

If i want to visit you ,how to do ?

Our company is located in Yueqing city of Zhejiang province China,which is about40 minutes by car to Wenzhou air port & 30 minutes from Yueqing train station.About 1 hrs by air from Shanghai international airport and 1 hrs from Ningbo bytrain. lf you need invitation letter before come to China,we can give it to you.