Quality Transformer Manufacturing: Compact Design for Energy Solutions

• 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: Efficiency Meets Innovation

SPECIFICATION: Meticulously Crafted for Superior Performance

1. Product Description

Introducing the SCB series epoxy resin dry-type transformers, a pinnacle of engineering excellence from Zhejiang Gangkong Electric Co., Ltd. These transformers shine with unmatched safety, unwavering reliability, superior energy efficiency, and hassle-free maintenance. Meticulously crafted to balance economic viability with top-tier security, these transformers are versatile enough to cater to a multitude of environments, making them ideal for a wide spectrum of applications.
Our commitment to cutting-edge design, rigorous manufacturing processes, and comprehensive testing ensures that each transformer is of the highest quality. Built with HV windings of 99.9% pure oxygen-free copper conductor, epoxy network cloth, and resin, and LV windings of the same superior copper foil, along with an iron core of premium high-permeability cold-rolled silicon steel, these transformers exhibit exceptional mechanical and electrical prowess, along with outstanding heat dissipation capabilities, minimal local discharge, extraordinary reliability, and extended operational longevity. They boast non-moisture absorption, flame retardancy, explosion-proof qualities, zero pollution, minimal energy loss, lightweight, automated temperature control, optimized installation space, reduced maintenance expenses, and remarkable energy savings, making them perfect for centraldistribution. Suitable for urban development, towering skyscrapers, bustling commercial zones, serene residential areas, dynamic entertainment hubs, critical hospitals, vibrant tourist attractions, busy airports, maritime ports, railway terminals, intricate subways, expansive highway tunnels, and various industrial and defense settings, including petrochemical enterprises, power facilities, food processing plants, wastewater treatment, offshore oil platforms, and mining operations.




2. The Use of Environmental and Working Conditions
2.1 The installation site elevation must not surpass 1000m, and ambient temperatures should remain within40 °C (provisions for exceptions can be made through specialized designs).
2.2 Designed for diverse operational environments, these transformers endure 100% relative humidity withstanding temperatures from +40ºC to -25ºC, accommodating on-load switches and temperature controller needs.
2.3 Primarily intended for indoor settings, the installation area must be spotless, free from electric dust and corrosive gases, and must have exemplary ventilation. In scenarios like basements where ventilation is compromised, forced ventilation options should be explored, with approximately 3-4m3/min ventilation requiredper 1kw loss (including both no-load and load losses).
2.4 Generally, a clearance of 800mm is required from the wall and other surroundings with obstaclesand 300mm between neighboring transformers. Adjustments can be made based on space constraints of the distribution box and other installations.
2.5 Typically, the transformer can be stationed directly at the site and activated post-inspection. For scenarios necessitating shock-proof measures, the foundation should be anchored with bolts, ensuring secure fixation through bolts and nuts.

3. Main Specifications and Technical Parameters
3.1 Rated Frequency:50Hz
3.2 Cooling Method: AN or tailored to user preferences.
3.3 Shell Protection Level: IP20 or customized as per user specifications.
3.4 Connection Group Label: DynIl or according to user requirements.
3.5 Transformer Phase Sequence: Observing from the high voltage side, the sequence follows ABC on the high voltage side and abc on the low voltage side.
3.6 Winding Insulation Class: F class.
3.7 Insulation Level
Discover the remarkable power and resilience of our transformers! For our 10kV products, they boast a power frequency withstand voltage of 35kV and an impressive impact withstand voltage of 75kV. Our 20kV products elevate performance with a power frequency withstand voltage of 55kV and an outstanding impact withstand voltage of 125kV. Experience the robustness of our 35kV products, designed to endure with a power frequency withstand voltage of 70kV and an incredible impact withstand voltage of 170kV.
3.8 Temperature Rise Limit: A crucial factor ensuring optimal performance and longevity of our transformers.
Our transformers are engineered with an advanced insulation system rated at a temperature of 155°C. They deliver exceptional reliability with a maximum temperature rise of 100K, ensuring consistent performance even under demanding conditions.









4.

Product Parameters

SCB
Voltage Class (kV)
Capacity (KVA)
Performance Level Code
Expertly designed with a copper foil wound epoxy resin pouring, the low-voltage coil ensures unparalleled efficiency and durability.
Three-Phase


5. Product System Description
5.1 Temperature Display and Temperature Control System
This product can be customized to include a state-of-the-art temperature display and control system, which offers the following functionalities: (1) Emission of an overload alarm signal, with an automatic temperature display for user convenience.
(2) Enhanced safety features include automatic fan operation or power disconnection when the coil's internal temperature surpasses a pre-set threshold on the signal thermometer.
5.2 Cooling System
The cooling method employed is Air Natural Cooling (AN), ensuring full capacity utilization at 100%.; For more demanding conditions, a Forced Air Circulation Cooling (AF) system allows long-term overload of 25% and short-term overload of up to 50%.
5.3 Protection Level
The standard protection level for this transformer is IPO0, and it is designed for indoor applications without an external shell. Should you require indoor use; it can be upgraded with a protective shell,if necessary, with options for IP20 or IP23. Note: A higher protection level may necessitate transformer capacity adjustments.
IP20 enclosures prevent the entry of solid objects larger than 12mm, safeguarding live components. IP23 extends protection against vertical water drippage at a 60° angle.


6. Product Packaging and Transportation
6.1 Our products are available in two formats: open type (without protective cover) and protected type (with a protective shell). They are suited for railway, waterway, and highway transport, with the option for partial disassembly for transport (e.g., on-load tap changer, temperature controller, air cooling device, protective cover, etc. can be separately packaged) or for complete packaging in a transport box. Products can be safely loaded and unloaded using cranes, winches, or other suitable transportation machinery.
6.2 During transit, products must be shielded with waterproof coverings to protect against rain damage.
6.3 When lifting boxed products, ropes should be securely attached to the sleepers at the bottom corners. Products can be elevated 100mm-150mm off the ground with a specialized lifting device and formally lifted once stability is confirmed.
6.4 During transportation, ensure the slope of the transport line does not exceed 15°, maintaining vehicle load balance. The product's center of gravity should align with the vehicle's vertical center line when loaded. To prevent displacement and toppling, align the product’s long axis with the transport direction and firmly secure it to the vehicle.
6.5 For vehicle loading and unloading without cranes, adhere to safety technical requirements and verify that lifting capacity matches the product's transport weight.
6.6 To ensure seamless and stable transportation, the product's detachable trolley base, equipped with rollers, is typically removed during transit. This facilitates smooth movement and guarantees stability. Upon reaching the installation site, the trolley is reassembled. For versatile movement, the roller axles can be adjusted to a 90° angle, allowing the product to glide effortlessly in both horizontal and vertical directions.
6.7 Upon the product's arrival at its destination, it is crucial to minimize its time spent in transit mode, particularly if exposed to the elements. Prior to installation, aim to store the product in a dry, covered, and ventilated location. Additionally, proactive measures should be implemented to shield the product from any mechanical damage and contamination.


7. Inspection and acceptance
7.1 Upon receipt, the user should promptly open the shell to conduct a thorough inspection and acceptance process. Verify the completeness of items against the packing list, assess for any transportation-induced damages, check for displaced or damaged parts, ensure fasteners are secure, inspect the integrity of insulation, and confirm the cleanliness of the coil surface.
7.2 Validate the product's nameplate data to ensure consistency with the user’s specified requirements, including product specifications, capacity, voltage level, connection group label, and short-circuit impedance.
7.3 Ensure all technical documents accompanying the delivery are complete and intact.
7.4 Should the product not be immediately operational post-unpacking, it is imperative to repackage and store it securely indoors to prevent damage or theft.
7.5 During transformer acceptance, it is essential to have a co-signed handover document with the transportation department. This document should detail any issues identified during inspection.

8. Appearance inspection before installation
8.1 Upon unpacking, remove any protective devices and meticulously inspect the external condition. Focus on the mechanical integrity of the coil and core, their compression degree, and the tightness of the bolts at external connections.
8.2 Post-inspection, systematically tighten all fasteners and pressing parts of the coil and iron core. It is critical to eliminate any looseness.
8.3 Follow factory technical conditions and assembly instructions to disassemble and reinstall the transformer body accurately.
8.4 Use dry compressed air or clean rags to remove any dust and dirt from the product surface.
8.5 If prolonged storage has led to water beads or significant condensation on the transformer surface, perform a drying treatment until the coil insulation resistance meets the standards.

9. Inspection and test before operation
9.1 Measure the DC resistance of high and low voltage windings, ensuring data alignment with the factory test certificate.
9.2 Verify the iron core grounding, typically located at the lower or upper iron yoke ends, checking for reliable grounding, absence of other body laps, and avoiding multiple groundings.
9.3 Conduct insulation resistance testing
(Voltage level) 10kv 20kv 35kv
HV coil to LV coil ≥500 MΩ ≥ 800 MΩ ≥ 1000 MΩ
HV coil to Ground Ensuring superior insulation performance, the resistance to ground is an impressive ≥500 MΩ. Redefining reliability with a resistance of ≥800 MΩ, our transformers set new standards. Exceptional grounding resistance assurance of ≥1000 MΩ for heightened safety.
LV to Ground Enjoy peace of mind with ground resistance at a robust ≥50MΩ. Experience steadfast reliability with a ground resistance of ≥50MΩ. Remarkable stability guaranteed with a ground resistance of ≥50MΩ.
Core to Ground Secure performance with a core to ground resistance of ≥5MΩ. Trust in consistent quality with core to ground resistance at ≥5MΩ. Enjoy superior safety with core to ground resistance assurance of ≥5MΩ.
9.4 When performing external construction frequency voltage resistance testing, it is crucial to pay close attention to remove the temperature control probe wire from the coil to ensure the immaculate protection of internal thermostat components from breakdown.
9.5 Conduct a meticulous check to confirm that the protection system is operating normally.
9.6 For optimal operation, position the transformer at a minimum distance of 800mm from walls and any objects impeding heat dissipation. Once installed, secure the transformer to the general ground loop for steadfast reliability in grounding.

10, Network operation
10.1 Begin by ensuring the attached protection device and monitoring system are grounded and fully qualified. The transformer should initially operate under no-load conditions. Follow with three shock closings, and subsequently, calibrate the protection system for precision.
10.2 Post-delivery, connect the voltage regulation tap position of the HV side in accordance with the rated position. Should voltage adjustment be necessary during operation, adjust the corresponding tapping connection according to the product nameplate's tapping voltage. Ensure such adjustments occur only when the transformer power supply is disconnected to maintain safety.
10.3 Our transformer utilizes the innovative BWDK series temperature controller. The temperature measuring element is strategically positioned at the upper end of the low-voltage coil. This allows for automatic detection and display of the three-phase coil's operational temperature. As the coil temperature reaches pre-set levels, the system engages functions like fan control, alarms, and trip functions. Users have the flexibility to adjust these settings per the thermostat manual.

11. Maintenance
After a designated operational period, initiate a shut-off phase for essential checks and comprehensive maintenance to ensure long-term efficiency and reliability.
11.1 Conduct a thorough inspection of the coil, iron core, wire sealing, tap-connecting terminals, and fasteners. Look out for any signs of damage, deformation, loosening, discoloration, overheating traces, or corrosion. In case of anomalies, assess for operational impact and implement corrective measures as necessary.
11.2 Dust off the transformer with care. Clean all accessible parts with a dry cloth, strictly avoiding volatile cleaners. For hard-to-reach areas within the iron core coil, employ compressed air to ensure thorough dust removal.
11.3 For transformers equipped with a fan, remove any dust or soil accumulation carefully to prevent fan blade deformation. Inspect the fan bearings' grease, replenishing or replacing as needed to maintain optimal performance.
11.4 Upon completing inspection and maintenance, meticulously ensure no metal or non-metal foreign objects remain within the coil, iron core, or insulation before reinitiating transformer operation.


12. Security matters
12.1 For unparalleled safety, ensure the power supply to the temperature controller and fan is expertly routed through the switch panel, maintaining a clear separation from the transformer. 12.2 Prior to energizing the transformer, conduct a meticulous inspection of the grounding system within the transformer room to guarantee seamless operation.
12.3 Secure the transformer shell door firmly to uphold the highest standards of electrical safety and protect against unauthorized access.
12.4 Implement effective strategies to keep the transformer room off-limits to small animals, significantly reducing the risk of unexpected incidents.
12.5 As a safety protocol, personnel entering the transformer room must don insulated footwear, maintain a safe distance from live components, and strictly avoid any direct contact with the transformer.
12.6 In the event of a sudden increase in transformer noise, prioritize an immediate assessment of the transformer load and power grid voltage. Closely monitor any temperature fluctuations and promptly engage with specialized personnel for expert guidance.
12.7 Schedule a comprehensive inspection of the transformer every 3-5 years, incorporating essential preventive tests to ensure sustained reliability and performance.
12.8 Entrust the installation, testing, operation, and maintenance of transformers to skilled professionals, ensuring adherence to industry-leading standards for optimal functionality.

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.