Efficient Power Distribution Solutions with High-Quality Dry-Type Transformers

• 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 series of SCB epoxy resin dry type transformer have the advantage of safety,reliability,energy saving and easy maintenance,From the conditions of economy,safety and applicable environment,this series of transformers has a wide range of application.
The product design is advanced,the process is strict,and the test is perfect.The HV winding is made of 99.9% oxygen-free copper conductor,epoxy network cloth and resin,the LV winding is made of 99.9% oxygen-free copper foil,the iron core is made of high quality and high permeability cold rolled silicon steel sheet and special binding method. Therefore, the product has high mechanical strength and electrical strength, and has very excellent heat dissipation performance, the product has small local discharge, high reliability, long operating life, non-moisture absorption, flame retardant, explosion proof, no pollution, small loss, light weight, automatic temperature control, saving installation space, saving maintenance costs, saving energy and other advantages, can go deep into the load center, It is suitable for urban construction, high-rise buildings, commercial centers, residential areas, entertainment and sports centers, hospitals, tourist buildings, airports, ports, railway stations, subways, highway tunnels, civil air defense facilities, petrochemical enterprises, electrical enterprises, food industry, sewage purification, offshore oil platforms, mines and other places.




2. The use of environmental and working conditions
2.1 The elevation of the installation site shall not exceed 1000m, and the ambient temperature shall not exceed 40 ° C (if this requirement is exceeded, special design can be carried out).
2.2 Operating environment, the relative humidity is 100%, the environment is +40ºC to -25ºC(-25C with on-load switch and temperature controller requirements).
2.3 This product is generally indoor, and the installation site should be clean with no electric dust, no corrosive gas, and have good ventilation conditions. If the installation is in the basement or other places with poor ventilation, the problem of forced ventilation should be considered. This product requires about 3-4m3/min ventilation per 1kw loss (no-load loss + load loss).
2.4 When the product is installed, it should generally be 800mm away from the wall and other obstacles, and there should be a distance of 300mm between adjacent transformers. The above distance can be adjusted when the distribution box and other installation space are limited.
2.5 Under normal circumstances, the transformer can be placed directly on the site of use, and can be put into operation after installation and inspection. For the case of shock-proof and other special requirements, the foundation of the transformer should be installed with bolts, and the transformer should be fixed by bolts and nuts.

3. Main specifications and technical parameters
3.1 Rated frequency :50Hz
3.2 Cooling method :AN or according to user requirements.
3.3 Shell protection level :IP20 or according to user requirements.
3.4 Connection Group label :DynIl or as required by the user.
3.5 Transformer phase sequence: Facing the high voltage side of the transformer from left to right, the high voltage side is ABC and the low voltage side is abc.
3.6 Winding insulation class :F class.
3.7 Insulation Level
Our cutting-edge products are designed to withstand rigorous voltage demands. The 10kV product boasts a power frequency withstand voltage of 35kV and an impact withstand voltage of 75kV. For the 20kV product, the power frequency withstand voltage is an impressive 55kV, with an impact withstand voltage reaching 125kV. Meanwhile, our robust 35kV product is engineered to handle a power frequency withstand voltage of 70kV and an outstanding impact withstand voltage of 170kV.
3.8 Temperature Rise Limit:
Our dry-type transformers feature a superior insulation system temperature of 155°C, ensuring reliability and longevity. They exhibit a maximum temperature rise of 100K, maintaining optimal performance under demanding conditions.









4.

Product Parameters

SCB
Voltage Class (kV)
Capacity (KVA)
Performance Level Code
The low-voltage coil features copper foil wound with epoxy resin pouring for exceptional durability and performance.
Ideal for three-phase applications, ensuring stable and consistent energy distribution.


5. Product System Description
5.1 Temperature Display and Control System
This product offers a customizable temperature display and control system to meet user demands, providing functions such as: (1) Overload alarm signals are dispatched promptly, and the current temperature is automatically displayed for user awareness.
(2) Should the coil's internal temperature exceed preset limits, the system activates fans and may disconnect power to safeguard the transformer.
5.2 Cooling System
Our state-of-the-art cooling system offers air natural cooling (AN), ensuring 100% output capacity.; Additionally, forced air circulation cooling (AF) allows for a 25% long-term and 50% short-term overload capacity, enhancing performance under demanding conditions.
5.3 Protection Level
This product typically maintains a protection level of IP00, ideal for indoor use without a shell. However, if required, it can be equipped with a protective shell for outdoor applications; It supports IP20 or IP23 protection levels (with note of potential capacity reduction for high protection levels).if customers need enhanced protection, IP20 prevents solid objects over 12mm from entering, and IP23 additionally shields against water at a 60° angle.
Note: An IP20 enclosure efficiently safeguards against objects larger than 12mm, while IP23 also protects from water intrusion, ensuring reliability in varied environments.


6. Product Packaging and Transportation
6.1 Our products are categorized into open type (without protective cover) and protected type (with protective shell). Suitable for diverse transport modes such as railway, waterway, and highway. If necessary, products can be partially disassembled for transportation, including components like on-load tap changers and temperature controllers, or the entire unit can be packed for shipment. Use cranes, winches, or appropriate machinery for safe lifting and unloading.
6.2 Ensure products are covered with waterproof cloth during transportation to prevent rain damage.
6.3 When lifting packaged products, use ropes attached to the bottom corners of the packing boxes. Lift 100mm-150mm above the ground with special devices, proceeding only if secure.
6.4 For a smooth transport experience, ensure the transport line does not exceed a 15° slope. Load evenly with the product's center of gravity aligned vertically on the vehicle. Securely tie products to prevent movement or toppling, aligning the product's long axis with the direction of travel.
6.5 When handling vehicles without cranes, ensure strict adherence to safety technical requirements. Verify that the lifting capacity aligns seamlessly with the product's transportation weight. This meticulous check guarantees a smooth and secure loading and unloading process.
6.6 For transportation stability, the user's request entails removing rollers from the car's base during transit and resetting them upon installation. For products with trolleys, adapt the roller axle orientation by 90° at both ends of the frame to facilitate effortless horizontal or vertical movement, ensuring seamless transportation.
6.7 Upon arrival at the destination, it is imperative to minimize parking time, especially outdoors. Prior to installation, store the product in a covered, dry, and ventilated area. Employ protective measures to shield the product from mechanical damage and contamination, thereby maintaining its pristine condition.


7. Inspection and acceptance
7.1 Upon receipt, users should promptly open the shell for thorough inspection and acceptance. Verify completeness of items listed in the packing list, assess for transport-induced damage, and scrutinize parts for dislocation or damage, fastener looseness, insulation integrity, and coil cleanliness.
7.2 Confirm that the product nameplate data matches the user's specified product specifications, including capacity, voltage level, connection group label, and short-circuit impedance, ensuring conformity and reliability.
7.3 Ensure all delivery technical documents are complete, facilitating a smooth and informed acceptance process.
7.4 If immediate operation post-unpacking isn't feasible, repackage the product and secure it indoors to prevent potential damage and theft, safeguarding its quality and value.
7.5 For transformer acceptance, sign the appropriate handover document with the transportation department. This document should detail any issues discovered during inspection, ensuring transparent and accountable acceptance.

8. Appearance inspection before installation
8.1 Upon unpacking, remove any protective devices and inspect the external condition meticulously. Pay special attention to the coil and core's mechanical integrity, their compression level, and the secure tightness of the bolts in external connections, ensuring optimal readiness for installation.
8.2 Post-inspection, retighten all fasteners and coil and core pressing parts sequentially. Any looseness is unacceptable, as it could compromise the product's structural integrity.
8.3 Disassemble and reinstall the transformer body following factory technical conditions and complete assembly guidelines. Adherence to instructions ensures flawless reassembly.
8.4 Eliminate all dust and dirt from the product using dry compressed air or clean rags, maintaining cleanliness and operational efficiency.
8.5 If long storage results in water beads or significant condensation on the transformer surface, perform a dry treatment until the coil insulation resistance meets the required standards, ensuring safety and performance.

9. Inspection and test before operation
9.1 Measure the DC resistance of both high and low voltage windings, ensuring the data aligns with the factory test certificate for precise operational readiness.
9.2 Check the grounding of the iron core. Typically, the ground lug is found at the lower or upper iron yoke end. Ensure grounding is reliable, with no other body laps or multiple grounding points, ensuring safe and efficient operation.
9.3 Conduct insulation resistance tests
across various voltage levels: 10kv 20kv 35kv
evaluating HV coil to LV coil insulation, ensuring robust performance under operational conditions. Insulation Resistance: ≥500 MΩ Insulation Resistance: ≥ 800 MΩ Insulation Resistance: ≥ 1000 MΩ
Measurement Point: HV coil to Ground Insulation Resistance: ≥500 MΩ Insulation Resistance: ≥800 MΩ Insulation Resistance: ≥1000 MΩ
Measurement Point: LV to Ground Insulation Resistance: ≥50MΩ Insulation Resistance: ≥50MΩ Insulation Resistance: ≥50MΩ
Measurement Focus: Core to Ground Insulation Resistance: ≥5MΩ Insulation Resistance: ≥5MΩ Insulation Resistance: ≥5MΩ
9.4 For optimal operational safety during external construction frequency voltage resistance testing, it is essential to pay special attention to remove the temperature control probe wire from the coil to avert any potential breakdown of the internal components of the thermostat, ensuring long-term reliability and safety.
9.5 Ensure the protection system is fully operational and functioning correctly.
9.6 For proper installation, the transformer should maintain a minimum distance of 800mm from walls and other objects to facilitate efficient heat dissipation. Post-installation, secure the transformer by connecting the ground bolt to the main ground loop for robust and dependable grounding.

10, Network operation
10.1 Upon ensuring the grounding of the protection device and monitoring system is qualified, initiate transformer operation under no-load conditions. Perform three shock closures and subsequently inspect and fine-tune the protection system to guarantee optimal performance.
10.2 Post-delivery, connect the voltage regulation tap position on the HV side to the specified rated position. If voltage adjustments are necessary during operation, adhere to the tapping voltage guidelines provided on the product nameplate. Ensure voltage adjustments are conducted only when the transformer is powered off for safety.
10.3 Equipped with the advanced BWDK series temperature controller, the transformer features a temperature measuring element strategically positioned at the upper end of the low-voltage coil. This setup automatically monitors and displays the working temperature of each phase coil. Upon reaching the defined temperature, the system can autonomously control fan activation, cessation, alarm functions, and tripping actions, with user-adjustable settings available as per the thermostat manual.

11. Maintenance
To uphold peak performance, periodically disconnect the dry transformer for necessary inspections and maintenance routines.
11.1 Conduct thorough inspections of the coil, iron core, wire sealing, tap-connecting terminals, and fasteners across various sections to identify any signs of damage, deformation, loosening, discoloration, overheating, or corrosion. In case of abnormalities, assess for operational damage and implement requisite corrective measures.
11.2 Perform dust removal on the transformer by wiping all accessible areas with a dry cloth, strictly avoiding volatile cleaners. For internal sections of the iron core coil that are challenging to reach, use compressed air to ensure a clean and efficient operation.
11.3 For transformers equipped with cooling fans, thoroughly eliminate dust and soil deposits from the fan to prevent any potential deformation of the blades. Additionally, inspect the fan bearing grease and replenish or replace it as needed to maintain smooth functionality.
11.4 After completing the meticulous inspection and maintenance of the transformer, it is imperative to conduct a thorough examination to ensure there are no misplaced metal or non-metal foreign objects that may have inadvertently fallen into the coil, iron core, or insulation parts before reintegrating the transformer back into operation.


12. Important Security Considerations
12.1 It is advisable to connect the power supply for the temperature controller (and fan) via the switch panel, rather than directly linking it to the transformer, to promote operational safety. 12.2 Prior to energizing the transformer, a comprehensive check of the grounding system within the transformer room is essential to ensure utmost safety.
12.3 To protect against electrical hazards, ensure that the door of the transformer enclosure remains securely closed at all times.
12.4 Implementing effective measures to deter small animals from entering the transformer room is crucial to avert potential accidents and maintain safety.
12.5 Personnel entering the transformer room must be equipped with insulating footwear, remain vigilant about maintaining a safe distance from live components, and strictly avoid contact with the transformer to ensure personal safety.
12.6 An unexpected increase in transformer noise warrants immediate attention to the transformer's load and power grid voltage. It's crucial to closely monitor temperature fluctuations and promptly communicate with relevant personnel for expert consultation.
12.7 Conducting a comprehensive check of the transformer every 3-5 years is recommended, alongside the execution of preventive tests to ensure optimal performance and safety.
12.8 Only qualified professionals are authorized to handle the installation, testing, operation, and maintenance of transformers, ensuring adherence to safety and operational standards.

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.