Advanced Dry-Type Transformer for Efficient Power Management and Distribution

• 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

DRY TYPE TRANSFORMER

SPECIFICATION

1. Product Description

The SCB epoxy resin dry-type transformers from Zhejiang Gangkong Electric Co., Ltd boast exceptional benefits including safety, reliability, energy efficiency, and low maintenance. Designed with economic and safety considerations in mind, these transformers are perfectly suited for a wide variety of applications due to their adaptable nature. This series of transformers offers extensive usability across multiple environments, making it a versatile choice for diverse needs.
Boasting advanced product design, stringent manufacturing processes, and flawless testing protocols, these transformers are engineered with premium materials. The HV winding employs 99.9% pure oxygen-free copper conductors, epoxy network cloth, and resin, while the LV winding utilizes the same purity copper foil. The iron core consists of high-grade and high-permeability cold-rolled silicon steel sheets, assembled with a distinctive binding method. As a result, these transformers exhibit superior mechanical and electrical strength, alongside an outstanding heat dissipation capability. Additionally, they deliver minimal local discharge, ensuring remarkable dependability and durability. They stand out with high reliability and a long operational lifespan, resistance to moisture, flame-retardant and explosion-proof properties, eco-friendly pollution-free design, minimal energy loss, lightweight construction, automatic temperature control, and a space-saving form factor. These attributes contribute to reduced installation and maintenance costs while enhancing energy efficiency, allowing seamless integration into the load center.Ideal for urban infrastructure projects, towering skyscrapers, bustling commercial hubs, vibrant residential complexes, lively entertainment and sports arenas, essential hospitals, captivating tourist attractions, as well as major transportation nodes like airports, ports, and rail stations. Additionally, they are perfect for subways, highway tunnels, civil defense installations, petrochemical and electrical enterprises, the food industry, sewage treatment plants, offshore oil platforms, mines, and other demanding environments. air defense facilities, petrochemical enterprises, electrical enterprises, food industry, sewage purification, offshore oil platforms, mines, and countless other challenging locations.




2. The ideal environmental and operational conditions for usage
2.1 The installation site should remain below 1000 meters in elevation, with ambient temperatures not surpassing 40°C. Should these parameters be exceeded, a specialized design can be custom developed to accommodate these conditions.ll not exceed 40 ° C (if this requirement is exceeded, special design can be carried out).
2.2 This product excels in environments with 100% relative humidity, functioning perfectly between +40ºC to -25ºC. If operating at -25ºC, an on-load switch and temperature controller are necessary.
2.3 Typically, these transformers are designed for indoor use, demanding a clean installation site free from electric dust and corrosive gases, while ensuring optimal ventilation. In areas like basements where airflow is limited, forced ventilation becomes essential. These transformers require approximately 3-4 cubic meters per minute of fresh air per 1kW of energy loss (this includes both no-load and load loss). ventilation per 1kw loss (no-load loss + load loss).
2.4 It is generally recommended to position the transformer 800mm away from walls or other obstacles, maintaining a 300mm gap between adjacent units. These dimensions can be adjusted if space constraints within the distribution box or installation area necessitate.
2.5 Under standard conditions, these transformers can be directly placed at the usage site, ready for operation post-installation and inspection. In scenarios requiring shock-proof capabilities or other special considerations, mount the transformer on a foundation with bolts for secure fixation. bolts and nuts.

3. Key specifications and technical parameters
3.1 Rated frequency:50Hz
3.2 Cooling method: AN or as per user requirements.
3.3 Enclosure protection grade: IP20, or as specified by the customer.
3.4 Connection group designation: DynIl, or tailored to user requirements.
3.5 Transformer phase sequence: When viewed from the high-voltage side, the sequence is ABC for high voltage and abc for low voltage.
3.6 Winding insulation class: F class.
3.7 Insulation Level
Discover the formidable capabilities of our Advanced Dry-type Transformer, engineered for unparalleled power management and distribution. Experience the robust power frequency withstand voltage of 35kV and a remarkable impact withstand voltage of 75kV for 10kV products. Elevate your systems with 20kV products, boasting a power frequency withstand voltage of 55kV and a striking impact withstand voltage of 125kV. Further, explore the 35kV products that feature a substantial power frequency withstand voltage of 70kV and an impressive impact withstand voltage of 170kV.
3.8 Temperature Rise Limit: Discover the maximum efficiency with our precise temperature control capabilities.
Our Advanced Dry-type Transformer features an Insulation System Temperature of 155°C, ensuring optimal performance. With a maximum temperature rise of 100K, our transformer delivers outstanding reliability and efficiency, guaranteeing seamless operation under varying conditions.









4. Explore our range of cutting-edge solutions designed to meet your power distribution needs effortlessly.

Product Parameters

Type: SCModel: B
Voltage Class: KV
Capacity: KVA
Performance Level Code
Our low-voltage coil boasts a premium copper foil winding with epoxy resin casting, ensuring superior performance.
Phase: Three-phase


5. Comprehensive Product System Overview
5.1 Advanced Temperature Monitoring and Control System
Tailored to user requirements, this product features a state-of-the-art temperature display and control system, designed to: (1) Emit an overload alarm and instantly showcase temperature readings.
(2) Automate the fan operation when coil temperature surpasses pre-set limits, disconnecting power and halting transformer operation for safety.
5.2 Robust Cooling System
Cooling Methodology Natural Air Cooling (AN), maintaining full output capacity at 100%; Forced air circulation cooling (AF) allows for sustained 25% overload, with short-term capabilities reaching a 50% overload.
5.3 Enhanced Protection Level
Standard protection for this product is rated at IPO0, meaning it is not equipped with a protective enclosure, and thus requires indoor installation; It can be optionally equipped with a housing,if users require, offering IP20 or IP23 protection (note: higher protection levels may necessitate reduced transformer operation).
Note: IP20 housing safeguards against solid objects larger than 12mm, creating a secure barrier for live components. IP23 protection extends this to prevent water droplet entry within a 60° vertical angle.


6. Expert Product Packaging and Transportation Solutions
6.1 Products are classified into open-type (without protective cover) and protected type (featuring a sturdy protective shell), suitable for transport across railways, waterways, and highways. If needed, they can be partially disassembled for transport (e.g., on-load tap changer, temperature controller, air cooling device, protective cover, require separate packaging) or shipped as a complete unit within a protective case. Cranes, winches, or suitable machinery can be used for safe product handling.
6.2 During transit, ensure the product is covered with waterproof material to shield against rain exposure.
6.3 When lifting packaged products, tie ropes at the four bottom corners of the boxes. The products can be elevated 100-150mm from the ground using specialized lifting equipment, only proceeding if no abnormalities are detected.
6.4 During transportation, maintain a line gradient below 15° up or downhill. Position the product's center of gravity along the vehicle's vertical center line for balanced load distribution. Secure the product to prevent shifting or toppling, aligning the product's long axis with the direction of travel and firmly anchoring it to the transport vehicle.
6.5 When loading and unloading vehicles without cranes, it is crucial to adhere to stringent safety technical standards. Ensure the lifting capacity is thoroughly checked and perfectly aligned with the transportation weight of the Advanced Dry-type Transformer for Efficient Power Management and Distribution.
6.6 For products requiring a car with a bottom roller, during transportation, it is generally advised to remove these rollers to safeguard the product's stability. Upon arrival at the destination, restore them before installation. If the product features a trolley, consider adjusting the roller axle at both ends by 90° to facilitate effortless horizontal or vertical movement.
6.7 Upon reaching the destination, minimize the parking duration of the product in the transportation state, especially when exposed to the elements. Prior to installation, store it in a covered, dry, and well-ventilated environment. Take proactive measures to shield it from mechanical damage and contamination.


7. Inspection and acceptance
7.1 Upon receiving the product, users should promptly open the shell for comprehensive inspection and acceptance. Verify the completeness of the items listed in the packing list, inspect the transformer for any transit-induced damage, assess parts for any dislocation or harm, ensure fasteners are secure, and confirm the cleanliness of coil surfaces.
7.2 Verify the consistency of the product nameplate data with the user's specified product specifications, including capacity, voltage level, connection group label, and short-circuit impedance.
7.3 Ensure that all delivery technical documents are complete and accurate.
7.4 If the product is not immediately operational post-unpacking, it should be repackaged and stored in a secure indoor location to prevent potential damage and theft.
7.5 During transformer acceptance, a comprehensive handover document should be signed with the transportation department, detailing any issues detected during inspection.

8. Appearance inspection before installation
8.1 After opening the packing case, remove any protective devices and conduct a meticulous examination of the external condition. Pay special attention to the mechanical integrity and compression degree of the coil and core, as well as the tightness of the bolts connecting the assembly.
8.2 Post-inspection, re-tighten all fasteners and pressing components of the coil and iron core sequentially, ensuring there is no looseness whatsoever.
8.3 Disassemble and reassemble the transformer body, adhering strictly to the factory technical conditions and the complete assembly guidelines provided.
8.4 Use dry compressed air or clean rags to meticulously remove dust and dirt from the product, maintaining its pristine condition.
8.5 If the storage duration has led to water droplets or severe condensation on the transformer surface, undertake a drying process until the coil insulation resistance is thoroughly validated.

9. Inspection and test before operation
9.1 Measure the DC resistance of both high and low voltage windings to ensure data alignment with that provided in the factory test certificate.
9.2 Inspect the iron core grounding, typically located at the lower or upper iron yoke ends, to affirm reliable grounding and check for any unwanted body laps or multiple grounding issues.
9.3 Conduct an insulation resistance test
across varied Voltage levels: 10kv 20kv 35kv
High Voltage Coil to Low Voltage Coil Insulation Resistance: ≥500 MΩ - Ensure robust electrical insulation and safety. Outstanding Insulation: ≥ 800 MΩ - Exceed standard expectations for enhanced protection. Exceptional Insulation: ≥ 1000 MΩ - Maximum safety and efficiency in operation.
High Voltage Coil to Ground Insulation Resistance: ≥500 MΩ - Maintain optimal grounding and operational security. Reliable Insulation: ≥800 MΩ - Superior protection against electrical faults. Peak Insulation: ≥1000 MΩ - Unmatched safety and reliability.
Low Voltage to Ground Insulation Resistance: ≥50 MΩ - Essential for secure grounding. Dependable Insulation: ≥50 MΩ - Consistent safety assurance. Steadfast Insulation: ≥50 MΩ - Trustworthy operational stability.
Core to GroundConnection Insulation Resistance: ≥5MΩ - Fundamental for core safety and efficiency. Basic Insulation: ≥5MΩ - Ensures core-ground separation. Primary Insulation: ≥5MΩ - Integral for long-term reliability.
9.4 During the process of external construction frequency voltage resistance, it is imperative to ensure proper removal of the temperature control probe wire from the coil to prevent potential breakdown of the thermostat's internal components.
9.5 Conduct a thorough examination to confirm the normal operation of the protection system.
9.6 It is crucial to install the transformer at a distance of at least 800mm from walls and any objects that could impede heat dissipation. Once installed, securely connect the ground bolt to the main grounding loop for reliable grounding.

10, Network Operation
10.1 With the grounding and qualification of the attached protection device and monitoring system verified, the transformer should initially operate under no-load conditions. After three trial closings, proceed to inspect and calibrate the protection system as necessary.
10.2 Following product delivery, align the voltage regulation tap position on the High Voltage (HV) side with the rated position. For voltage adjustments during operation, refer to the tapping voltage indicated on the product nameplate. Ensure all voltage modifications are performed with the transformer power supply disconnected.
10.3 The transformer integrates a BWDK series temperature controller, with the temperature sensor situated at the upper end of the low-voltage coil. This setup facilitates automatic detection and display of each phase coil's working temperature. Upon reaching the set temperature, the thermometer can autonomously activate the fan, halt operation, trigger alarms, trips, and adjustments as dictated by the thermostat manual.

11. Maintenance
After a designated period of operation, it is essential to disconnect the dry transformer for comprehensive checks and maintenance.
11.1 Inspect the coil, iron core, wire seals, tap-connecting terminals, and fasteners across various sections for signs of damage, deformation, loosening, discoloration, overheating, or corrosion. Any abnormalities detected should prompt an evaluation for operational impact and the implementation of corrective measures.
11.2 Clean the transformer by removing dust. Use a dry cloth to wipe all accessible parts, avoiding volatile cleaners. Utilize compressed air to clean areas inside the iron core coil that are difficult to reach manually.
11.3 For transformers equipped with fans, ensure to remove any dust and soil accumulation in the fan, taking care to prevent deformation of the fan blades. Also, inspect the fan bearing grease, replenishing or replacing as necessary to maintain optimal performance.
11.4 Upon completing the thorough inspection and meticulous maintenance, it is crucial to ensure that no metal or non-metal objects have inadvertently fallen or been left within the coil, iron core, or insulation components before the transformer resumes operation.


12. Security Considerations
12.1 The power supply for the temperature controller, along with the fan, must be routed through the switch panel, rather than being directly linked to the transformer. 12.2 A comprehensive check of the grounding system in the transformer room is essential before initiating the transformer's operation.
12.3 Ensuring the door of the transformer casing is securely closed is vital for maintaining electrical safety.
12.4 The transformer room must be equipped with effective measures to prevent the entry of small animals, thereby avoiding potential accidents.
12.5 Personnel entering the transformer room are required to wear insulating shoes, maintain a safe distance from live parts, and must refrain from physical contact with the transformer.
12.6 In the event that the transformer begins to produce unusually loud noises, it is imperative to immediately check the load on the transformer and the voltage of the power grid, closely monitor temperature fluctuations, and promptly consult with relevant personnel.
12.7 It is recommended that the transformer undergo an inspection every 3-5 years, during which various preventive tests can be conducted to ensure continued reliability.
12.8 The installation, testing, operation, and maintenance of transformers must strictly be conducted by qualified and certified professionals.

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.