Custom OEM Transformer Solutions for Efficient Power Distribution Needs

• Customization: Available
• Application: Power, Electronic, Instrument, Lighting
• Phase: Three
• Model NO.: S11
• Core: Core-type Transformer
• 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

At Zhejiang Gangkong Electric Co., Ltd, our SCB series epoxy resin dry-type transformers are meticulously engineered for unparalleled excellence. They stand out for their safety, unwavering reliability, energy efficiency, and ease of maintenance. Meticulously designed to fulfill the economic, safety, and environmental needs, these transformers are a robust solution for diverse applications. Thanks to their versatile design, this series of transformers is ideally suited to a wide array of environments, offering unrivaled performance and adaptability.
Crafted with cutting-edge design, rigorous processes, and flawless testing, our transformers feature HV windings of 99.9% pure oxygen-free copper conductor, epoxy network cloth, and resin. The LV windings also harness 99.9% oxygen-free copper foil. The core, made from high-quality cold-rolled silicon steel sheet, uses a specialized binding method for exceptional mechanical and electrical strength, along with outstanding heat dissipation, minimal local discharge, and remarkable resilience. Our transformers boast high reliability and endurance, offering a prolonged operational lifespan. They are crafted to resist moisture absorption, flame retardant and explosion-proof, providing pollution-free, low-loss, lightweight solutions. With automatic temperature control, they save on installation space, maintenance costs, and energy. These transformers are engineered for applications deep within the load center.Ideally suited for urban development, from high-rise buildings to commercial hubs and residential complexes, these transformers are perfect for entertainment venues, hospitals, airports, ports, subways, railway stations, tunnels, and civil air defense systems. Additionally, they are excellent for petrochemical enterprises, electrical services, the food industry, sewage treatment facilities, offshore oil platforms, mines, and much more.




2. The use of environmental and working conditions
2.1 Installation sites should not exceed elevations of 1000m, while ambient temperatures should remain within 40°C.If these parameters exceed the standards, we offer specialized designs to accommodate.
2.2 In operational environments, relative humidity can reach 100%, with temperatures ranging from +40ºC to -25ºC. Special requirements, such as on-load switch and temperature control, are accommodated.
2.3 Typically designed for indoor use, these transformers require clean installation sites, free from electric dust and corrosive gases, with excellent ventilation. In confined spaces like basements, forced ventilation is essential, requiring about 3-4m3/min per 1KW loss. Ventilation is crucialper 1KW loss (encompassing both no-load and load losses).
2.4 Upon installation, maintain a distance of 800mm from walls or other obstacles, and a clearance of 300mm between adjacent transformers. These distances can be adjusted based on the distribution box and available installation space.
2.5 Typically, transformers can be directly placed at the site of use and commissioned after installation and inspection. For scenarios with specific requirements like shock-proofing, secure the transformer with bolts and nuts on a sturdy foundation. Utilizing bolts and nuts ensures firm anchorage.

3. Main specifications and technical parameters
3.1 Rated frequency:50Hz, providing consistency and reliability.
3.2 Cooling method: AN, or customizable to user specifications.
3.3 Shell protection level: IP20, adaptable to user needs, offering dependable protection.
3.4 Connection Group label: DynIl, tailored to user requirements for seamless integration.
3.5 Transformer phase sequence: When facing the high voltage side, the sequence is ABC for high voltage and abc for low voltage, ensuring clarity and precision in installation.
3.6 Winding insulation class: F class, guaranteeing superior insulation performance.
3.7 Insulation Level: Designed to meet the highest industry standards, ensuring exceptional durability and safety.
Our state-of-the-art transformers boast superior durability and resilience. For the 10kV models, experience a power frequency withstand voltage of 35kV and an impressive impact withstand voltage of 75kV. The 20kV models are engineered to deliver a robust power frequency withstand voltage of 55kV, coupled with an impact withstand voltage of 125kV. Finally, our 35kV models provide a remarkable power frequency withstand voltage of 70kV, along with a high impact withstand voltage of 170kV, ensuring unmatched performance and reliability.
3.8 Temperature Rise Limit: Our transformers are expertly designed with a focus on thermal efficiency to ensure optimal performance and longevity.
Insulation System Temperature (°C): 155. Experience peace of mind with a maximum temperature rise of just 100K, guaranteeing safety and stability under demanding conditions.









4. Explore further the cutting-edge features and advantages that set our transformers apart in the industry.

Product Parameters

SCB
Voltage class kv
Capacity KVA
Performance level code
Crafted with precision, the low-voltage coil features a copper foil wound epoxy resin pouring, ensuring superior performance and durability.
Designed for optimal efficiency, this product is a robust three-phase system.


5. Product System Description
5.1 Temperature Display and Temperature Control System
Tailored to user specifications, this product can be equipped with an advanced temperature display and control system. Key functionalities include: (1) Overload alarm signal notification with automatic temperature display.
(2) Proactively starts and stops the fan when the coil's internal temperature exceeds preset limits, disconnecting the power supply to prevent overheating.
5.2 Cooling System
Our cooling method is highly efficient, incorporating air natural cooling (AN),ensuring the output capacity is maintained at 100%; additionally, forced air circulation cooling (AF) allows for a long-term overload of 25% and a short-term overload capacity of up to 50%.
5.3 Protection Level
This product boasts a general protection level of IP00; the transformer comes without a shell by default, ideal for indoor use. However, it can be enhanced with a shell,if users require, achieving IP20 or IP23 levels. Note that higher protection levels may necessitate a reduction in transformer capacity.
Important: The IP20 casing prevents entry of solid objects larger than 12mm, safeguarding live components. An IP23 protective shell adds water droplet resistance at angles up to 60° from vertical.


6. Product Packaging and Transportation
6.1 Our products are categorized into two types: open type (lacking a protective cover) and protected type (featuring a protective shell).Suitable for railway, waterway, and highway transport, they can be partially disassembled for transport needs (such as on-load tap changers, temperature controllers, air cooling devices, protective covers) or shipped as a whole in packing boxes. Utilize cranes, winches, or other suitable transport machinery for lifting and unloading.
6.2 Ensure the product is covered with waterproof cloth to shield against rain during transport.
6.3 When lifting packed products, ropes should be secured to the sleepers at the bottom corners of packing boxes. Products can be lifted 100mm-150mm off the ground with special lifting equipment, proceeding only if conditions are stable.
6.4 During transport, limit slope gradients to within 15° to evenly distribute vehicle load. The product's center of gravity should align with the vehicle's vertical centerline when loaded. To prevent shifting or toppling, align the product's long axis with the transport direction and securely fasten it to the vehicle.
6.5 When it comes to loading and unloading vehicles without the aid of cranes, it is absolutely essential to adhere to stringent safety technical requirements. Prior to lifting, the lifting capacity must be meticulously verified to ensure it aligns perfectly with the product's transportation weight. This attention to detail guarantees seamless and secure handling every step of the way.
6.6 To meet the user's exacting standards, if the product is paired with a car, it is imperative to remove the rollers at the base during transit. This crucial step guarantees unmatched stability in transportation. Upon arrival at the destination, the rollers are reinstated for flawless installation. For products equipped with a trolley, the roller axle can be ingeniously adjusted by 90°, empowering the product to glide effortlessly in both horizontal and vertical directions.
6.7 Once the product reaches its intended destination, it is of utmost importance to minimize its parking duration in the transportation state, especially in open-air conditions. Prior to installation, the product should ideally be placed in a covered, dry, and well-ventilated area. Additionally, comprehensive measures should be implemented to protect the product from any potential mechanical damage and pollution.


7. Inspection and acceptance
7.1 Upon receipt of the product, users are urged to promptly open the shell for a thorough inspection and acceptance process. This involves meticulously verifying the completeness of items listed in the packing list. Users should also examine the transformer for any transit-related damage, displacement of product parts, loose fasteners, compromised insulation, or dirt on the coil surface, ensuring everything is in impeccable condition.
7.2 It is critical to ensure that the data on the product nameplate precisely matches the user's predetermined product specifications, including capacity, voltage level, connection group label, and short-circuit impedance, safeguarding against any discrepancies.
7.3 A comprehensive check must be conducted to confirm that all delivery technical documents are complete, ensuring every aspect is accounted for.
7.4 Should the product not be put into operation immediately post-unpacking, it is essential to repackage it meticulously and store it indoors in a safe location to prevent any potential damage or theft.
7.5 During transformer acceptance, a corresponding handover document must be signed in collaboration with the transportation department. This document should comprehensively reflect any issues identified during the meticulous inspection process.

8. Appearance inspection before installation
8.1 Upon opening the packing case, any protective devices should be carefully removed to facilitate an inspection of the external condition. Particular attention should be given to the mechanical integrity of the coil and core, the compression degree, and the tightness of the bolts outside the connection, ensuring everything is perfectly intact.
8.2 After conducting inspections, it is imperative to retighten all fasteners and pressing parts of the coil and iron core in sequence, leaving no room for any potential loosening.
8.3 The transformer body should be disassembled and reinstalled in strict accordance with factory technical conditions and relevant complete assembly instructions, ensuring optimal performance.
8.4 The product's surface should be thoroughly cleaned using dry compressed air or clean rags to remove any dust or dirt, maintaining its pristine condition.
8.5 If the storage duration has been prolonged and there are visible water beads or significant condensation on the transformer surface, a comprehensive drying treatment should be executed until the coil insulation resistance meets the required standards.

9. Inspection and test before operation
9.1 It is essential to measure the DC resistance of both high and low voltage windings, ensuring the data matches the values specified in the factory test certificate, confirming impeccable consistency.
9.2 Conduct a thorough check of the iron core's grounding. The ground lug is typically located at either the end of the lower or upper iron yoke. This inspection confirms reliable grounding, checks for any other body laps, and verifies the absence of multiple groundings, maintaining flawless electrical integrity.
9.3 Conduct an insulation resistance test to verify the voltage levels:
(Voltage level) 10kv 20kv 35kv
from HV coil to LV coil, ensuring everything is in perfect operational order. Resistance Value: ≥500 MΩ Remarkable Insulation: ≥ 800 MΩ Superior Resistance: ≥ 1000 MΩ
Insulation Assessment: HV coil to Ground Resistance Value: ≥500 MΩ Remarkable Insulation: ≥800 MΩ Superior Resistance: ≥1000 MΩ
Insulation Evaluation: LV to Ground Reliable Resistance: ≥50MΩ Reliable Resistance: ≥50MΩ Reliable Resistance: ≥50MΩ
Insulation Test: Core to GroundConnection Secure Resistance: ≥5MΩ Secure Resistance: ≥5MΩ Secure Resistance: ≥5MΩ
9.4 When conducting external construction frequency voltage resistance tests, ensure to pay careful attention to removethe temperature control probe wire from the coil. This precaution is vital to prevent breakdown of the internal thermostat components.
9.5 Thoroughly check the protection system to confirm its normalcy.
9.6 For optimal performance, the transformer should be installed with at least 800mm clearance from the wall and objects that could hinder heat dissipation. Grounding is crucial; thus, ensure the ground bolt connects reliably to the general ground loop post-installation.

10, Seamless Network Operation
10.1 Upon successful grounding and qualification of the protection and monitoring systems, initiate the transformer in a no-load state. Conduct three shock closings to evaluate and adjust the protection system if necessary.
10.2 Post-delivery, ensure the voltage regulation tap of the HV side is set to the rated position. Any voltage adjustments during operation should correspond with the tapping voltage as listed on the product nameplate. Perform these adjustments only when the transformer power supply is disconnected.
10.3 Featuring the advanced BWDK series temperature controller, the transformer autonomously detects and displays the operative temperatures of the three-phase coil. The temperature-measuring elements, located at the upper end of the low-voltage coil, ensure real-time monitoring. The device automatically operates the fan and triggers alarms based on temperature settings, which can be tailored per the thermostat manual.

11. Maintenance Procedures
For optimal longevity, periodically cut off power to perform vital checks and maintenance on the dry transformer.
11.1 Inspect critical components such as the coil, iron core, wire sealing, tap-connecting terminals, and fasteners for any signs of damage, deformation, or discoloration. Address any abnormalities promptly to prevent operation impediments.
11.2 Perform thorough dusting of the transformer. Use dry cloths for all accessible areas and compressed air for internal parts like the iron core coil, avoiding volatile cleaners.
11.3 For fan-equipped transformers, clean out any dust and debris in the fan area. Carefully inspect and lubricate the fan bearing, replacing grease as needed to maintain optimal function.
11.4 Following the meticulous completion of inspection and maintenance, it is imperative to ensure no metallic or non-metallic foreign objects have inadvertently remained within the coils, iron core, or insulation components before reintegrating the transformer into operational status.


12. Security Matters
12.1 The power supply for the temperature controller (and fan) should be sourced through the switch panel rather than a direct connection to the transformer, ensuring a secure setup. 12.2 Prior to the transformer’s activation, a thorough examination of the grounding system within the transformer room is crucial to maintain utmost safety.
12.3 Ensure that the transformer casing door remains securely closed to uphold electrical safety standards.
12.4 Implement effective measures to prevent small animals from infiltrating the transformer room, thereby mitigating potential accident risks.
12.5 Personnel entering the transformer room must don insulated footwear, maintain a safe distance from live components, and refrain from physical contact with the transformer to ensure safety.
12.6 Upon noticing any sudden increase in transformer noise, it is crucial to immediately assess the transformer’s load and the voltage of the power grid, closely monitor temperature fluctuations, and promptly consult with relevant experts.
12.7 A comprehensive check of the transformer should be conducted every 3-5 years. During this period, conducting preventive tests is recommended to ensure continued operational reliability.
12.8 The assembly, testing, operation, and maintenance of transformers must be carried out by certified professionals, guaranteeing expertise and safety in all processes.

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.