Reliable Compact Design Transformer for Power Distribution in Businesses

• 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

Our SCB epoxy resin dry-type transformer series stands out with its exceptional safety, unmatched reliability, energy-saving prowess, and effortless maintenance. Designed with economic efficiency and rigorous safety in mind, this series of transformers is extensively versatile, making it suitable for a wide array of applications.
With cutting-edge design, meticulous manufacturing processes, and impeccable testing, our transformers excel in performance. The HV winding is crafted from 99.9% pure oxygen-free copper conductor, epoxy network cloth, and resin, while the LV winding features 99.9% pure oxygen-free copper foil. The iron core is formed from premium, high-permeability cold-rolled silicon steel sheets, utilizing a special binding method. Thus, our product boasts high mechanical and electrical strength, along with remarkable heat dissipation capabilities, minimal local discharge, superior reliability, extended operational life, and resistance to moisture absorption. Our transformer is flame-retardant, explosion-proof, pollution-free, with minimal loss and lightweight. It features automatic temperature control, saving installation space, reducing maintenance costs, and optimizing energy use, making it perfect for penetrating the core of power needs.Ideal for urban development, towering skyscrapers, bustling commercial hubs, vibrant residential areas, entertainment and sports complexes, hospitals, tourist attractions, airports, ports, railway stations, subways, highway tunnels, and civil defense facilities. It's also perfect for petrochemical and electrical enterprises, the food industry, sewage purification centers, offshore oil platforms, and mines.




2. Environmental and Operating Conditions:
2.1 The elevation where the transformer is installed should not surpass 1000m, and the ambient temperature mustnot exceed 40 °C. If these conditions are exceeded, we offer specialized design solutions.
2.2 Operating conditions require 100% relative humidity, in an environment ranging from +40ºC to -25ºC (with specific on-load switch and temperature controller needs).
2.3 Primarily indoor, installation locales must be clean, free from electric dust and corrosive gases, with excellent ventilation. If installed in a basement or poorly ventilated area, consider forced ventilation with approximately 3-4m3/min of air flowper 1kW loss (encompassing both no-load and load loss).
2.4 Upon installation, a gap of 800mm from walls and other obstaclesis typically required, with 300mm between adjacent transformers. These distances may be adjusted to fit distribution box constraints or limited installation spaces.
2.5 Generally, transformers can be directly placed at the site of use, ready for operation post-installation and inspection. For scenarios requiring shock-proofing, install with bolts, securing the transformer firmly using bolts and nuts for stability.

3. Main Specifications and Technical Marvels
3.1 Rated Frequency: A steady50Hz for consistent performance.
3.2 Cooling Method: AN, or tailored to user specifications.
3.3 Shell Protection Level: IP20, with customization available upon request.
3.4 Connection Group Label: DynIl, or as per user requirements.
3.5 Transformer Phase Sequence: Facing the high voltage side, the configuration reads ABC for high voltage and abc for low voltage.
3.6 Winding Insulation Class: F, ensuring robust insulation.
3.7 Insulation Level: Crafted to perfection for optimal functionality.
Our transformers are engineered to deliver outstanding performance in power distribution with robust voltage withstand capabilities: - 10kV product: A power frequency withstand voltage of 35kV and an impressive impact withstand voltage of 75kV. - 20kV product: Offers a power frequency withstand voltage of 55kV, complemented by a remarkable impact withstand voltage of 125kV. - 35kV product: Featuring a power frequency withstand voltage of 70kV and a substantial impact withstand voltage of 170kV.
3.8 Temperature Rise Limit: Experience optimal performance with controlled and efficient thermal management.
Insulation System Temperature (°C): A robust 155°C ensures reliability. Maximum Temperature Rise (K): A controlled increase of 100K, securing long-term performance and stability.









4.

Product Parameters

SCB
Voltage class kv
Capacity KVA
Performance level code
The low-voltage coil is meticulously crafted with copper foil wound in a durable epoxy resin pouring
three-phase


5. Product System Description
5.1 Temperature Display and Temperature Control System
Tailored to the needs of users, this product can be enhanced with a sophisticated temperature display and control system, offering capabilities including: (1) Triggering an overload alarm and automatically showcasing the prevailing temperature.
(2) Activating or halting the fan, disconnecting the power supply, and cutting off the transformer if the coil's internal temperature surpasses the limits predefined by the signal thermometer.
5.2 Cooling System
The cooling methodology employed is air natural cooling (AN), ensuring full output capacity at 100% efficiency; employing forced air circulation cooling (AF) allows for a long-term overload of 25% and a short-term overload of up to 50%.
5.3 Protection Level
Typically, this product offers a protection level of IP00, and it's not equipped with an external shell, requiring indoor usage; It can be outfitted with an external shell,if the user desires, allowing for IP20 or IP23 protection (at higher protection levels, consider reduced transformer capacity).
Note: The IP20 casing effectively blocks solid objects larger than 12mm, ensuring a protective barrier for live components. Additionally, IP23 further safeguards against water droplets falling at a 60° angle from the vertical.


6. Product Packaging and Transportation
6.1 Products are categorized into open type (without protective cover) and protected type (with a robust protective shell), ideally suited for railway, waterway, and highway transportation. If necessary, they can be partially disassembled for transport (like on-load tap changers, temperature controllers, air cooling devices, and protective covers, which may require separate packaging) or shipped whole in a secure packing box. Appropriate lifting machinery like cranes or winches should be used for handling these products.
6.2 During transit, products must be safeguarded with waterproof cloth to fend off rain and moisture.
6.3 For lifting boxed products, ropes should be secured on sleepers positioned at the bottom corners. Special lifting devices can elevate the packaged products 100mm-150mm above the ground to ensure safety before formal lifting.
6.4 During transport, the line should not exceed slopes of 15° up or down, ensuring even load distribution on the vehicle. The center of gravity should align with the vehicle's vertical centerline when loading. To prevent displacement and toppling, align the product's long axis with the transport direction and firmly secure it to the vehicle.
6.5 When loading and unloading vehicles without cranes, it is imperative to adhere to stringent safety technical requirements. The lifting capacity must be meticulously checked to ensure full alignment with the transportation weight of the product to guarantee secure and efficient handling.
6.6 For smooth and safe transportation, if the product is to be moved with a car, ensure that the roller at the bottom is typically removed during transit to maintain stability. Before installation at the destination, the roller should be reset. For products with a trolley, consider altering the direction of the roller axle at both ends of the frame to a 90° angle, enabling the product to navigate either horizontally or vertically with ease.
6.7 Upon reaching the destination, it is advisable to minimize the product's parking duration while in its transportation state, particularly when exposed to the elements. Ideally, the product should be housed in a dry, ventilated shelter prior to installation. Simultaneously, protective measures must be taken to shield the product from mechanical damage and environmental pollution.


7. Inspection and acceptance
7.1 Upon arrival, the user should promptly open the shell to thoroughly inspect and accept the product. This involves verifying the completeness of items listed on the packing list, checking for any transportation-induced transformer damage, displaced or damaged components, loose fasteners, compromised insulation, or dirt on the coil surfaces.
7.2 Ensure that all data on the product nameplate match the user's specified product specifications, including capacity, voltage level, connection group label, and short-circuit impedance, to confirm its suitability.
7.3 Confirm that all delivery technical documents are complete and in order.
7.4 Should the product not be immediately put into operation post-unpacking, it must be carefully repackaged and stored safely indoors to prevent any potential damage or theft.
7.5 During transformer acceptance, a signed handover document between the user and the transportation department is essential. This document should comprehensively detail any issues identified during the inspection process.

8. Appearance inspection before installation
8.1 Upon opening the packing case, remove any protective devices and conduct a thorough external inspection. Pay special attention to the mechanical integrity and compression level of the coil and core, as well as the tightness of the bolts outside the connection, ensuring everything is in impeccable condition.
8.2 Post-inspection, it is crucial to retighten all fasteners and pressing parts of the coil and iron core sequentially to prevent any loosening.
8.3 Follow the factory's technical conditions and assembly instructions to disassemble and reinstall the transformer body accurately and safely.
8.4 Employ dry compressed air or clean rags to meticulously remove all dust and dirt from the product, ensuring it remains spotless.
8.5 If the transformer has been stored for an extended period resulting in water beads or significant condensation, a drying treatment is necessary until the coil insulation resistance meets the required standards.

9. Inspection and test before operation
9.1 Conduct a measurement of the DC resistance of both high and low voltage windings. Verify that this data aligns perfectly with the figures presented in the factory test certificate for reliability.
9.2 Verify the grounding of the iron core, typically located at the end of the lower or upper iron yoke. Ensure the grounding's reliability and check for any other body lap or multiple grounding issues to guarantee electrical safety.
9.3 Test the insulation resistance
(Voltage level) 10kv 20kv 35kv
HV coil to LV coil Insulation Resistance: ≥500 MΩ Insulation Resistance: ≥ 800 MΩ Insulation Resistance: ≥ 1000 MΩ
High Voltage Coil to Ground Insulation Insulation Resistance: ≥500 MΩ Insulation Resistance: ≥800 MΩ Insulation Resistance: ≥1000 MΩ
Low Voltage to Ground Insulation Core Insulation: ≥50MΩ Core Insulation: ≥50MΩ Core Insulation: ≥50MΩ
Core to Ground Insulation InsulationGrounding Core Insulation: ≥5MΩ Core Insulation: ≥5MΩ Core Insulation: ≥5MΩ
9.4 During external construction frequency voltage resistance testing, ensure that you carefully removethe temperature control probe wire from the coil to avoid internal issues with the thermostat.
9.5 Verify the normal operation of the protection system.
9.6 Ensure the transformer is at least 800mm from walls or heat-obstructing objects. Post installation, connect the grounding bolt to the main ground loop for secure grounding.

10, Network Operation
10.1 With grounded protection and monitoring systems, initiate the transformer under no-load conditions. After three closing shocks, verify and adjust the protection system.
10.2 Post-delivery, the high voltage side's voltage regulation tap is set as per the rated position. For voltage adjustments during operation, perform tapping according to the product's nameplate indications. Ensure to cut off the transformer power supply before adjusting. High Voltage Voltage regulation on the high voltage side requires following the guidance on the nameplate; ensure power is cut off before making changes.
10.3 The transformer employs the BWDK series temperature controller. The sensor at the low-voltage coil's upper end automatically detects and shows the working temperature of the three coils. When the coil temperature hits the preset point, the system can autonomously activate or deactivate the fan, trigger alarms, or trip. Adjust temperature settings as needed, following the thermostat manual.

11. Maintenance
After a period of operation, disconnect the dry transformer for essential inspection and maintenance.
11.1 Inspect the coil, core, wire sealing, connecting terminals, and fasteners for damage, deformation, looseness, discoloration, overheating signs, or corrosion. Address any abnormalities promptly.
11.2 Clean the transformer. Wipe all reachable parts with a dry cloth; avoid volatile cleaners. Use compressed air to clean areas within the core coil that are less accessible.
11.3 For transformers with fans, remove dust and dirt from the fan (carefully to avoid blade deformation), and check the fan bearing's grease, replenishing or replacing as necessary.
11.4 Once the inspection and maintenance have been meticulously conducted, a thorough check is imperative before re-energizing the transformer. Ensure that no metallic or non-metallic foreign objects have inadvertently been left behind in the coil, iron core, or insulation components, as this could compromise the performance and safety.


12. Security matters
12.1 Ensure that the power supply for the temperature controller and fan is routed through the switch panel, rather than being directly connected to the transformer. 12.2 Prior to transformer activation, a comprehensive examination of the grounding system in the transformer room is crucial to guarantee safety.
12.3 For optimal safety, ensure that the transformer enclosure door is securely closed, safeguarding all personnel from electrical hazards.
12.4 The transformer room must be equipped with reliable measures to prevent the intrusion of small animals, thereby averting potential accidents and ensuring smooth operation.
12.5 When entering the transformer room, it is essential for personnel to wear insulated footwear. Maintain a safe distance from energized components and refrain from physical contact with the transformer to prevent accidents.
12.6 In the event of an unexpected increase in transformer noise, promptly assess the transformer's load and the power grid's voltage. Closely monitor temperature fluctuations and consult relevant experts without delay to address any issues.
12.7 It is advisable to conduct a detailed inspection of the transformer every 3-5 years. At this time, implementing preventive tests can enhance the longevity and reliability of the unit.
12.8 The installation, testing, operation, and maintenance of transformers should exclusively be executed by qualified professionals to ensure optimal functionality and safety.

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.