Dongguan Transformer Company: Compact Design for Optimal Power Distribution

• 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: Experience unparalleled efficiency and reliability with our cutting-edge dry type transformer, designed to elevate your power distribution with precision and safety.

SPECIFICATION: Delve into the detailed specifications of our product, meticulously engineered to meet the highest standards of performance and adaptability in diverse electrical environments.

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 transformers are engineered for superior performance, offering robust power handling at various voltage levels. For our 10kv product, experience a power frequency withstand voltage of an impressive 35kv and an impact withstand voltage of 75kv. Our 20kv variant excels with a power frequency withstand voltage of 55kv and an impact withstand voltage reaching a remarkable 125kv. The 35kv model is designed to deliver a power frequency withstand voltage of 70kv, withstanding impact voltages up to a notable 170kv, ensuring optimal power distribution across all models.
3.8 Temperature Rise Limit:
Our advanced insulation system is meticulously engineered to withstand high temperatures, ensuring reliability and longevity. It operates efficiently with an insulation system temperature rated at 155°C, accommodating a maximum temperature rise of 100k.









4.

Product Parameters

SCB
Voltage Class KV
Capacity KVA
Performance Level Code
The low-voltage coil is meticulously crafted with copper foil, and features an epoxy resin pour for enhanced durability.
Three-Phase


5. Product System Description
5.1 Temperature Display & Control System
Tailored to meet user specifications, this product can be equipped with a sophisticated temperature display and control system. This system provides crucial functionalities, including: (1) Emitting an overload alarm signal and automatically displaying temperature readings.
(2) Activating and deactivating the fan when the coil's internal temperature exceeds the limit set by the signal thermometer, allowing for power supply disconnection and transformer cutoff for safety.
5.2 Cooling System
The Cooling Method is Air Natural Cooling (AN), enabling the output capacity to reach 100%. ; A Forced Air Circulation Cooling (AF) system allows for long-term overload of 25% and short-term overload of 50%, enhancing operational versatility.
5.3 Protection Level
This product's general protection level is IPO0, and it does not come with a shell, making it ideal for indoor use. If indoor use is necessary; It can be equipped with a protective shell,if required by the user. Utilizing IP20 or IP23, consideration must be given to transformer capacity reduction under higher protection levels.
Note: An IP20 housing prevents the intrusion of solid objects larger than 12mm, safeguarding live components. Enhancing this, an IP23 shell protects against water droplets at a 60° angle, offering robust defense.


6. Product Packaging and Transportation
6.1 Products are available in two formats: open type (without a protective cover) and protected type (with a protective shell), suitable for railway, waterway, or highway transport. If needed, components can be partially disassembled for transport. For instance, the on-load tap changer, temperature controller, air cooling device, and protective cover may require separate packaging or comprehensive packing box transport. Use cranes, winches, or suitable machinery for efficient lifting and unloading.
6.2 During transit, ensure the product is covered with waterproof materials to guard against rain exposure.
6.3 When lifting packed products, ropes should be secured to the sleepers at the corners of the packing boxes. Lift the packaged goods 100mm-150mm off the ground using specialized equipment, ensuring no abnormalities before proceeding with a full lift.
6.4 During transportation, maintain the transport line at no more than a 15° gradient. This ensures even load distribution, with the product's center of gravity aligned with the vehicle's vertical center line. Securely fasten the product to prevent any displacement or toppling during transit.
6.5 For a seamless and secure experience when loading and unloading vehicles without cranes, it is paramount to adhere to stringent safety technical requirements. Ensure that the product's lifting capacity aligns perfectly with its transportation weight, safeguarding efficiency and safety.
6.6 To guarantee the utmost stability during transit, the user should have the product with a car, ensuring the roller at the bottom is removed throughout transportation. This practice ensures stability, with the roller reverted back to its original position upon arrival at the destination. For products equipped with a trolley, adapt the roller axle at both ends of the frame to a 90° angle, allowing the product to glide smoothly in both horizontal and vertical directions.
6.7 Once the product reaches its destination, strive to minimize the duration of its transportation state, particularly when exposed to the elements. Prioritize parking in a sheltered, dry, and well-ventilated area. Implement protective measures to shield the product from mechanical harm and contamination, preserving its integrity.


7. Inspection and acceptance
7.1 Upon receiving the product, users should promptly open the shell for a comprehensive inspection and acceptance process. Verify the completeness of the packing list items, assess potential transformer damage incurred during transit, and examine for displaced or damaged parts. Additionally, scrutinize fasteners for any signs of looseness, evaluate insulation for damage, and ensure the coil surface is pristine.
7.2 Confirm that the data on the product nameplate meticulously aligns 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 intact and complete for a seamless transition.
7.4 If the product is not immediately operational post-unpacking, it is crucial to repackage and secure it indoors to avert potential damage or theft.
7.5 During transformer acceptance, a collaborative handover document must be signed with the transportation department, documenting any issues uncovered during inspection for transparency and accountability.

8. Appearance inspection before installation
8.1 Carefully remove the packing case and any protective devices (if applicable) to meticulously inspect the external condition. Focus on the mechanical integrity of the coil and core, the degree of compression, and the precision of bolt tightness outside the connection. bolts outside the connection.
8.2 Post-inspection, diligently retighten all fasteners and pressing parts of the coil and iron core in sequence. Ensure there is absolutely no loosening, reinforcing product security.
8.3 Follow the factory technical conditions and accompanying instructions meticulously when disassembling and reinstalling the transformer body, ensuring complete and accurate assembly.
8.4 Employ dry compressed air or pristine rags to remove dust and dirt from the product surface, maintaining a spotless and professional appearance.
8.5 In cases where storage duration leads to water droplets or significant condensation on the transformer surface, undertake thorough drying treatments until the coil insulation resistance meets qualified standards.

9. Inspection and test before operation
9.1 Precisely measure the DC resistance of both high and low voltage windings, ensuring data consistency with the factory test certificate.
9.2 Scrutinize the iron core grounding, typically located at either the lower or upper iron yoke end, to verify the grounding's reliability and ensure there is no other body lap or multiple grounding present.
9.3 Conduct insulation resistance testing
(Voltage level) 10kv 20kv 35kv
HV coil to LV coil ≥500 MΩ Insulation resistance: ≥ 800 MΩ, ensuring superior electrical safety and performance. Insulation resistance: ≥ 1000 MΩ, offering enhanced protection and reliability.
High voltage coil to Ground: Exceptional safety standards maintained. Insulation resistance: ≥500 MΩ, demonstrating robust electrical integrity. Insulation resistance: ≥800 MΩ, ensuring durable and safe operations. Insulation resistance: ≥1000 MΩ, providing superior safety measures.
Low Voltage to Ground: Uncompromised grounding for enhanced protection. Insulation resistance: ≥50MΩ, promoting consistent and safe performance. Insulation resistance: ≥50MΩ, ensuring reliable operational safety. Insulation resistance: ≥50MΩ, maintaining dependable electrical security.
Core to Ground: Ensures stable and secure foundation. Ground: Unyielding protection against electrical hazards. Insulation resistance: ≥5MΩ, ensuring consistent safety. Insulation resistance: ≥5MΩ, providing reliable protection. Insulation resistance: ≥5MΩ, affirming safe operations.
9.4 When executing external construction frequency voltage resistance tests, pay carefulattention: Detach the temperature control probe wire from the coil to safeguard the internal components of the thermostat from potential breakdown.
9.5 Ensure the protection system functions optimally for unmatched security.
9.6 Position the transformer no closer than 800mm from walls or other barriers to heat dissipation. Once installed, secure the ground bolt to the primary ground loop, ensuring steadfast grounding.

10, Network Operation
10.1 With the protection device and monitoring system grounded and qualified, initiate transformer operation in a no-load state. After three shock closings, meticulously inspect and adjust the protection system for optimal efficiency.
10.2 Post-delivery, connect the voltage regulation tap position of the HV side according to the rated position. For voltage adjustments, refer to the tapping voltage indicated on the product nameplate. Ensure adjustments are performed with the transformer power supply disconnected, for safety.
10.3 The transformer utilizes the BWDK series temperature controller. The temperature measuring element is positioned at the low-voltage coil's upper end to automatically monitor and display the working temperature of each three-phase coil. Upon reaching the preset temperature, the thermometer will autonomously activate or deactivate the fan, trigger alarms, or initiate trips. Users can adjust these settings based on the thermostat manual, ensuring tailored temperature management.

11. Maintenance
After a designated operational period, disconnect the dry transformer for essential inspections and maintenance to ensure optimal performance.
11.1 Conduct thorough checks of the coil, iron core, wire sealing, tap-connecting terminals, and fasteners. Look for any signs of damage, deformation, looseness, discoloration, overheating, or corrosion. Promptly address any anomalies with necessary corrective actions.
11.2 Remove dust from the transformer. Use a dry cloth for accessible areas and compressed air for difficult-to-clean sections within the iron core coil. Avoid volatile cleaners to maintain component integrity.
11.3 For transformers with fans, ensure the removal of dust and soil accumulation. Avoid fan blade deformation and check the fan bearing grease, replenishing or replacing it as needed to ensure smooth operation.
11.4 Before reactivating the transformer post-maintenance, inspect thoroughly for any metal or non-metal foreign objects left in the coil, iron core, or insulation parts, ensuring a safe restart.


12. Security matters
12.1 To ensure optimal safety and functionality, it's imperative that the power supply to the temperature controller (and fan) is connected via the switch panel rather than directly to the transformer. Moreover, prior to the commissioning of the transformer, a thorough inspection of the grounding system in the transformer room is crucial.
12.3 To maintain electrical safety, it is essential that the door of the transformer enclosure remains securely closed.
12.4 Implement measures to prevent small animals from entering the transformer room, thereby mitigating the risk of potential accidents.
12.5 Personnel entering the transformer room should wear insulated footwear, maintain a safe distance from live components, and refrain from direct contact with the transformer to ensure their safety.
12.6 Should there be a sudden increase in transformer noise, it is vital to immediately assess the transformer load and the power grid voltage. Enhanced monitoring of the transformer's temperature fluctuations is necessary, and relevant personnel should be consulted promptly.
12.7 It's recommended that transformers undergo inspection every 3-5 years, during which preventive tests may also be conducted to ensure reliability and performance.
12.8 Only qualified professionals are authorized to handle the installation, testing, operation, and maintenance of transformers to ensure expert care and adherence to safety 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.