Advanced Dry-Type Transformer with Copper Material 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

DRY TYPE TRANSFORMER

SPECIFICATION

1. Product Description

Introducing the SCB Series of epoxy resin dry-type transformers - a true marvel in the realm of electrical engineering! Embodying the pinnacle of safety, reliability, energy efficiency, and effortless maintenance, this series is meticulously crafted to cater to both economic and safety criteria. Designed for versatility, these transformers excel across a myriad of environmental scenarios, offering a broad spectrum of applications.
Our product boasts an innovative design, rigorous manufacturing processes, and impeccable testing standards. The high-voltage winding is crafted with 99.9% pure oxygen-free copper conductors, epoxy network cloth, and resin, while the low-voltage winding utilizes 99.9% oxygen-free copper foil. The iron core, made from superior high-permeability cold-rolled silicon steel sheets, is bound using a specialized method. This results in formidable mechanical and electrical strength, exceptional heat dissipation, minimal local discharge, and unmatched reliability, ensuring a prolonged operational lifespan. Engineered to resist moisture absorption, these transformers are flame-retardant, explosion-proof, environmentally friendly, minimal in energy loss, lightweight, equipped with automatic temperature control, and designed to save installation space, maintenance costs, and energy. They seamlessly integrate into the load center and are the perfect fit for urban developments, skyscrapers, bustling commercial hubs, residential districts, entertainment and sports venues, hospitals, tourist attractions, airports, seaports, railway stations, subways, highway tunnels, civil defense installations, petrochemical industries, electrical enterprises, the food sector, sewage treatment plants, offshore oil rigs, mining operations, and beyond.




2. Environmental and Operational Conditions
2.1 Installation sites should not exceed an elevation of 1000m, with ambient temperatures not surpassing40°C. For environments exceeding these parameters, bespoke designs can be arranged.
2.2 Operating conditions are defined by a relative humidity of 100%, within a temperature range of +40ºC to -25ºC (with on-load switch and temperature controller adaptations for -25ºC).
2.3 Typically designed for indoor use, the installation area should remain free from electrical dust and corrosive gases while ensuring excellent ventilation. For sites like basements with limited airflow, forced ventilation solutions are advised, requiring approximately 3-4m3/min ventilation per 1 kW loss (inclusive of no-load and load losses).
2.4 Upon installation, the product should generally maintain an 800mm clearance from walls and other obstacles,and ensure a 300mm gap between adjacent transformers. Adjustments can be made in distribution boxes and limited spaces.
2.5 In standard circumstances, the transformer is directly placed at the utilization site, ready for operation post-installation and inspection. In cases requiring shock-proof measures, the foundation should include bolted installations, securing the transformer with bolts and nuts.

3. Key Specifications and Technical Parameters
3.1 Rated Frequency:50Hz
3.2 Cooling Method: AN or customized as per user specifications.
3.3 Shell Protection Level: IP20 or tailored to user requirements.
3.4 Connection Group Label: DynIl or as specified by the user.
3.5 Transformer Phase Sequence: When facing the high-voltage side, sequence is ABC for high voltage and abc for low voltage.
3.6 Winding Insulation Class: F class.
3.7 Insulation Level
Our cutting-edge Advanced Dry-type Transformer is engineered to meet rigorous power standards, providing exceptional reliability and efficiency. For our 10 kV product, it boasts a remarkable power frequency withstand voltage of 35 kV and an impressive impact withstand voltage of 75 kV. The 20 kV variant elevates its performance with a power frequency withstand voltage of 55 kV and an extraordinary impact withstand voltage of 125 kV. Our flagship 35 kV product commands attention with a robust power frequency withstand voltage of 70 kV and an unparalleled impact withstand voltage of 170 kV. Trust in our transformative technology for uncompromised power delivery.
3.8 Temperature rise limit: Our transformers are designed with precision to ensure optimal performance and safety, setting a high standard in temperature management.
Insulation system temperature (° C): 155. Maximum temperature rise (k): 100. Experience peace of mind with our state-of-the-art insulation system, meticulously crafted to withstand a maximum temperature rise of 100 K, while operating seamlessly at an insulation system temperature of 155°C. This ensures flawless operation and prolonged durability under demanding conditions.









4. The fourth section highlights additional technical specifications and features that make our Advanced Dry-type Transformer a leader in its field, further exemplifying our commitment to innovation and excellence.

Product Parameters

SCB
Voltage Class KV
Capacity KVA
Performance Level Code
The low-voltage coil marvels with its copper foil wound epoxy resin pouring, ensuring efficiency and durability.
Three-phase


5. Product System Description
5.1 Temperature Display and Temperature Control System
Tailored to user requirements, this product can be equipped with an advanced temperature display and control system. Its functionalities include: (1) sending overload alarm signals and automatically displaying temperature for seamless operations.
(2) Activating or deactivating the fan, disconnecting the power supply, and cutting off the transformer when the coil's internal temperature exceeds the pre-set limit by the signal thermometer.
5.2 Cooling System
The cooling methodology embraces air natural cooling (AN), allowing the output capacity to reach 100%; forced air circulation cooling (AF) facilitates a long-term overload of 25% and short-term overload capacity of up to 50%.
5.3 Protection Level
This product boasts a general protection level of IPO0. Designed for indoor use without a shell, additional protective measures may be required; It can be outfitted with a protective shell,if desired by the user, with IP20 or IP23 options available (consideration for capacity reduction is necessary when the protection level is elevated).
Note: The IP20 housing is adept at preventing solid objects larger than 12mm from entering, offering a robust safety barrier for live parts. Enhancing from IP20, the IP23 shell prevents water droplets from breaching an angle of 60° from vertical.


6. Product Packaging and Transportation
6.1 Products are available in two distinct types: open type (sans protective cover) and protected type (featuring a protective shell)—ideal for railway, waterway, and highway transport. If necessary, partial disassembly transportation options are available (items like on-load tap changer, temperature controller, air cooling device, protective cover require separate packaging) or full assembly in packing boxes for transport. Suitable lifting and unloading can be conducted using cranes, winches, or other appropriate transport machinery.
6.2 During product transportation, it is imperative to shield the product with waterproof cloth to guard against rain.
6.3 For lifting packed products, ropes should be attached to the sleepers at the bottom four corners of the packages. The lifted products should maintain a height of 100mm-150mm above the ground using a specialized lifting device, ensuring stability before completing the lift.
6.4 Throughout transportation, ensure the transport line does not exceed slopes of 15° up or down. This ensures even load distribution, with the product's center of gravity aligning with the vehicle's vertical center line during loading. To prevent displacement or toppling, maintain alignment of the product's long axis with the transport direction, and secure the product firmly to the transport vehicle.
6.5 Ensure safety and technical compliance when loading and unloading vehicles without cranes. The lifting capacity must match the product's transportation weight to guarantee secure handling.
6.6 For safe transit, when using a vehicle equipped with a roller at its base, remove the roller to maintain product stability. Post-transportation, reinstall the roller before installation. For trolley-based products, adjust the roller axle direction by 90° for seamless horizontal or vertical movement.
6.7 Upon reaching the destination, limit the time the product remains in transit state, especially outdoors. Park it in a dry, ventilated, and covered location to shield it from mechanical harm and contamination before installation.


7. Inspection and acceptance
7.1 Upon product arrival, promptly open the shell for thorough inspection and acceptance. Verify all items in the packing list are complete. Check for transportation damage, part displacement, loose fasteners, insulation issues, and cleanliness of the coil surface.
7.2 Confirm that the product nameplate data aligns perfectly 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.
7.4 If the product isn't immediately operational post-unpacking, repackage and store it safely indoors to prevent damage and theft.
7.5 During transformer acceptance, coordinate with the transportation department to sign the handover document, which should detail any issues found during the inspection.

8. Appearance inspection before installation
8.1 After unpacking, remove any protective devices and meticulously inspect the external condition, focusing on the mechanical integrity of the coil and core, their compression levels, and the bolt tightness at the connection points.
8.2 Post-inspection, ensure all fasteners, as well as coil and iron core pressing parts, are securely tightened, disallowing any looseness.
8.3 Follow factory technical conditions and assembly instructions to disassemble and reinstall the transformer body.
8.4 Remove dust and dirt using dry compressed air or clean rags for a spotless finish.
8.5 If the transformer has been stored for extended periods, and water beads or significant condensation are present, conduct a drying process until coil insulation resistance meets required standards.

9. Inspection and test before operation
9.1 Measure the DC resistance of both high and low voltage windings, ensuring the data matches the factory test certificate for consistency.
9.2 Inspect iron core grounding, typically found at the lower or upper iron yoke ends, to confirm reliability, absence of unauthorized body laps, and multiple grounding issues.
9.3 Conduct insulation resistance tests
(for Voltage levels) 10kv 20kv 35kv
between HV coil and LV coil for assurance. ≥500 MΩ ≥ 800 MΩ ≥ 1000 MΩ
HV coil to Ground ≥500 MΩ ≥800 MΩ ≥1000 MΩ
LV to Ground ≥50MΩ ≥50MΩ ≥50MΩ
Core to Ground ≥5MΩ ≥5MΩ ≥5MΩ
9.4 Ensure utmost caution during external construction frequency voltage resistance testing; it is essential to pay considerthe removal of the temperature control probe wire from the coil to safeguard against internal thermostat component breakdowns.
9.5 Verify that the protection system is functioning normally and optimally.
9.6 Position the transformer at a minimum distance of 800mm from walls and any objects that may impede heat dissipation. Upon installation, securely attach the ground bolt to the general ground loop for robust grounding.

10, Network operation
10.1 Once the associated protection device and monitoring system have been grounded and approved, initiate the transformer in no-load mode. Following three successive shock closings, diligently inspect and fine-tune the protection system.
10.2 Upon delivery, the voltage regulation tap position on the HV side is configured to the rated position. For operational voltage adjustments, the tapping connection can be modified according to the tapping voltage detailed on the product nameplate. Note that voltage modification must occur with the transformer power supply disconnected.
10.3 The transformer utilizes the BWDK series temperature controller, with temperature measuring elements situated at the upper end of the low-voltage coil. This arrangement enables automatic detection and display of the three-phase coil's operational temperatures. When the coil's temperature reaches a predefined level, the thermometer autonomously manages fan activation, deactivation, alarm signaling, and tripping, with adjustment settings customizable by the user per the thermostat manual.

11. Maintenance
After an operational period, the dry-type transformer should be deactivated for essential evaluations and upkeep.
11.1 Inspect the integrity and condition of the coil, iron core, wire sealing, tap-connecting terminals, and fasteners throughout various sections for any signs of damage, deformation, looseness, discoloration, overheating, or corrosion. Should anomalies be detected, assess potential operational impact and implement necessary corrective measures.
11.2 Clean the transformer thoroughly. All accessible components should be meticulously wiped with a dry cloth, taking care to avoid volatile cleaners. Use compressed air to cleanse inaccessible areas within the iron core coil.
11.3 For transformers equipped with fans, remove dust and debris accumulated in the fan. Exercise caution to prevent fan blade deformation due to damage. Inspect the fan bearing's grease, replenishing or replacing it as required.
11.4 Following the completion of inspection and maintenance, a meticulous check is imperative prior to reactivating the transformer. Ensure that no metallic or non-metallic debris or foreign objects have been inadvertently left behind within the coils, iron core, or insulation components.


12. Security Precautions
12.1 Ensure that the power supplied to the temperature controller (and fan) is routed through the switch panel, avoiding any direct connection to the transformer itself. 12.2 Prior to initiating transformer operations, it is crucial to conduct a thorough and detailed examination of the transformer room's grounding system.
12.3 For optimal safety and protection during electricity usage, the transformer shell door must remain securely closed at all times.
12.4 Implement measures to deter small animals from gaining entry to the transformer room, thereby preventing potential accidents and ensuring operational safety.
12.5 Personnel entering the transformer room must don insulation shoes and maintain a safe distance from live components. It is imperative to avoid any direct contact with the transformer.
12.6 An unexpected surge in transformer noise should prompt immediate attention to the load and power grid voltage; diligently monitor any fluctuations in transformer temperature, and promptly contact relevant personnel for expert consultation.
12.7 Regular transformer inspections should be conducted every 3-5 years, during which preventive tests can be carried out to ensure continued efficiency and safety.
12.8 The intricate processes of installation, testing, operation, and maintenance of transformers must be performed exclusively by certified and qualified 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.