Reliable Transformer with Voltage Control for Optimal Efficiency

• 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

Discover the unparalleled excellence of our SCB epoxy resin dry-type transformers. Renowned for their intrinsic safety, unyielding reliability, outstanding energy efficiency, and remarkably easy maintenance, these transformers embody state-of-the-art engineering. Boasting a dynamic adaptability, this series of transformers cater to a vast array of environments. Their versatile nature makes them ideal for diverse applications, whether industrial, commercial, or residential.
Meticulously designed with advanced technology, our product stands as a beacon of quality. The high-voltage winding utilizes 99.9% pure oxygen-free copper conductors, interwoven with epoxy network cloth and resin. Meanwhile, the low-voltage winding employs equally pure copper foil. The core, crafted from high-grade, high-permeability cold-rolled silicon steel sheets, combined with a unique binding technique, ensures exceptional mechanical and electrical strength, along with superior heat dissipation. This translates to minimal local discharge, bolstered reliability, and an extended operational lifespan. Our transformers are engineered to resist moisture absorption, be flame-retardant, explosion-proof, environmentally friendly, and exhibit minimal power loss. With a design focused on lightweight construction and automatic temperature regulation, they optimize installation space, reduce maintenance costs, and enhance energy savings, even in the most demanding settings.These transformers seamlessly integrate into urban infrastructure, adapting to high-rise constructions, commercial hubs, residential locales, and beyond. Whether for recreational venues, medical facilities, tourist attractions, or transportation terminals, their adaptability is unmatched. From civil defense installations to industrial enterprises like petrochemical, electrical, food processing, and offshore ventures, these transformers are the epitome of versatility, efficiency, and safety.




2. The Use of Environmental and Working Conditions
2.1 The installation site must not exceed an elevation of 1000 meters, while the ambient temperature should remain within a manageable range of 40 °C. Should these conditions be surpassed, our team can tailor a special design to meet your needs.Our transformers are robustly constructed to endure environments with 100% relative humidity and temperatures ranging from +40ºC to a chilly -25ºC, provided with an on-load switch and temperature controller requirements.
2.3 Generally suited for indoor settings, installation sites should be pristine, devoid of electrical dust or corrosive gases, and well-ventilated. In cases where ventilation is insufficient, like basements, forced ventilation solutions should be implemented.
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 installing, maintain at least an 800mm distance from walls or other obstaclesand ensure a 300mm gap between adjacent transformers. Adjustments to these distances can be made when space constraints are present, such as inside a distribution box.
2.5 Typically, transformers can be positioned directly at the site of use, ready for operation post-installation and inspection. However, for locations with specific requirements like shockproofing, the foundation should be secured with bolts, ensuring stable installation. Utilize bolts and nuts to firmly anchor the transformer, guaranteeing steadfast performance.

3. Main Specifications and Technical Parameters
3.1 Rated Frequency:50Hz, engineered for precision performance.
3.2 Cooling Method: AN or tailored to meet unique user requirements, ensuring optimal thermal management.
3.3 Shell Protection Level: IP20 or as per user specifications, offering robust defense against environmental challenges.
3.4 Connection Group Label: DynIl, customizable to user preferences for seamless integration.
3.5 Transformer Phase Sequence: Viewed from the high voltage side, the sequence is ABC for high voltage and abc for low voltage, ensuring precise electrical orientation.
3.6 Winding Insulation Class: F class, providing superior insulation and performance reliability.
3.7 Insulation Level
Experience unrivaled reliability and safety with Zhejiang Gangkong Electric Co., Ltd's transformers, designed to meet the most demanding electrical requirements. Our 10kV product boasts a power frequency withstand voltage of 35kV and an impressive impact withstand voltage of 75kV, ensuring exceptional durability. Upgrade to our 20kV solution, offering a power frequency withstand voltage of 55kV and a remarkable impact withstand voltage of 125kV, perfect for enhanced performance. Our 35kV product stands out with a robust power frequency withstand voltage of 70kV and an outstanding impact withstand voltage of 170kV, providing unmatched resilience and efficiency.
3.8 Temperature Rise Limit: Zhejiang Gangkong Electric Co., Ltd ensures that our transformers maintain optimal performance and longevity through diligent temperature control.
Engineered with precision, our transformers' insulation system operates safely at a temperature of 155°C, with a maximum temperature rise of 100K. This careful consideration of thermal regulation underscores our commitment to superior performance and safety.









4.

Product Parameters

SCB
Voltage class kv
Capacity KVA
Performance level code
The low-voltage coil is copper foil wound epoxy resin pouring
three-phase


5. Product system description
5.1 Temperature display and temperature control system
According to the requirements of users, this product can be equipped with temperature display temperature control system, its function is :(1) send overload alarm signal, automatically display temperature.
(2) When the internal temperature of the coil exceeds the limit set by the signal thermometer, the fan can be started and stopped, the power supply can be disconnected, and the transformer can be cut off.
5.2 Cooling System
The cooling method is air natural cooling (AN), the output capacity is 100%; forced air circulation cooling (AF) can be long-term overload 25%, short-term overload 50%.
5.3 Protection Level
The general protection level of this product is IPO0, the transformer is not equipped with the shell, need indoor use; It can be equipped with a shell,if the user needs and IP20 or IP23(when the transformer protection level is high, the transformer capacity reduction operation should be considered).
Note: The IP20 housing prevents the entry of solid objects larger than 12mm, providing a safety barrier for live parts. On the basis of IP20, the protective shell of IP23 can prevent water droplets from flowing into the vertical line at an Angle of 60°.


6. Product packaging and transportation
6.1 Products are divided into two types: open type (without protective cover) and protected type (with protective shell), usually for railway, waterway, highway transportation, if necessary, can be partially disassembled transportation (such as on-load tap changer, temperature controller, air cooling device, protective cover, etc., need to be packaged separately) or the whole into the packing box transportation. Cranes, winches or other appropriate transport machinery can be used to lift and unload products.
6.2 During the transportation of the product, the product must be covered with waterproof cloth to prevent rain.
6.3 In the process of lifting the products with packing boxes, the rope should be hung on the sleepers at the bottom four corners of the packing boxes. The packaged products can be lifted 100mm-150mm from the ground with a special lifting device, and then formally lifted after there is no abnormal condition.
6.4 In the process of transportation, the transportation line should not be greater than 15° up and down slopes, in order to ensure that the vehicle evenly bear the load, the product center of gravity is located on the vertical center line of the vehicle when loading. In order to prevent the displacement and toppling of the product during transportation, the direction of the long axis of the product should be consistent with the direction of transportation, and the product should be firmly tied to the transport vehicle.
6.5 When handling vehicles without cranes, ensure rigorous adherence to safety technical requirements. It is essential to verify the lifting capacity in alignment with the product's transportation weight to ensure seamless and safe logistics.
6.6 For user convenience, products with an attached trolley should have the bottom rollers generally removed during transit to maintain stability, reinserting them only post-arrival and prior to installation. Adapt the roller axle at the frame ends to a 90° angle, facilitating both horizontal and vertical movements with ease.
6.7 Upon arrival at the destination, minimize parking time in transport condition, especially outdoors. Whenever possible, park in a sheltered, dry, and ventilated area. Meanwhile, implement protective measures to safeguard against mechanical damage and contamination.


7. Inspection and Acceptance
7.1 Upon receiving the product, users should promptly open the shell to conduct a meticulous inspection and acceptance process. Verify the completeness of items against the packing list, assess the transformer for any transit-induced damage, check for displaced or damaged parts, loose fasteners, compromised insulation, and dirt on the coil surface.
7.2 Confirm that the data on the product nameplate matches the user's specified product attributes, including specifications, capacity, voltage level, connection group label, and short-circuit impedance.
7.3 Ensure the delivery includes all requisite technical documents.
7.4 If the product will not be activated immediately post-unpacking, repackage and store it securely indoors to avoid any form of damage or theft.
7.5 For transformer acceptance, a formal handover document should be co-signed with the transportation department, highlighting any issues discovered during the inspection.

8. Appearance Inspection Before Installation
8.1 After unpacking, remove any protective devices and thoroughly assess the external condition. Pay particular attention to the mechanical integrity and compression state of the coil and core, and ensure the bolts outside the connection are properly secured.
8.2 Post-inspection, systematically retighten all fasteners and coil and iron core pressing parts to preclude any looseness.
8.3 Disassemble and reassemble the transformer following the manufacturer's technical provisions and precise assembly instructions.
8.4 Use dry compressed air or clean rags to meticulously remove dust and dirt from the product.
8.5 If prolonged storage results in water beads or severe condensation on the transformer surface, undertake drying treatments until the coil insulation resistance is satisfactory.

9. Inspection and Test Before Operation
9.1 Measure the DC resistance of the high and low voltage windings, ensuring the data aligns with that provided in the factory test certificate.
9.2 Inspect the iron core grounding (typically located at the end of the lower or upper iron yoke) to verify reliable grounding, ensuring there is no other body lap or multiple grounding occurrences.
9.3 Test the insulation resistance at the following voltage levels:
(Voltage Level) 10kV 20kV 35kV
Ensuring robust insulation between the HV coil and LV coil is critical for optimal performance. Insulation resistance: ≥500 MΩ ensures a reliable safety margin. Insulation resistance of ≥ 800 MΩ provides enhanced protection and durability. Outstanding insulation resistance of ≥ 1000 MΩ for superior reliability.
HV coil to Ground insulation Ensures safety with insulation resistance ≥500 MΩ. Advanced protection with insulation resistance ≥800 MΩ. Superior performance with insulation resistance ≥1000 MΩ.
LV to Ground insulation integrity Reliable protection with ≥50MΩ insulation resistance. Consistent safety with ≥50MΩ insulation resistance. Dependable insulation with ≥50MΩ resistance.
Core to Ground connection Ground Solid grounding with insulation resistance ≥5MΩ for operational safety. Ensures reliability with ≥5MΩ grounding insulation. Safety assured with ≥5MΩ grounding insulation.
9.4 During external construction frequency voltage resistance tests, ensure careful removal ofthe temperature control probe wire from the coil to protect the internal thermostat components from breakdown.
9.5 Inspect the protection system's functionality thoroughly.
9.6 For effective heat dissipation, install the transformer at least 800mm away from walls and objects. Ensure grounding reliability by connecting the ground bolt to the main ground loop post-installation.

10, Network operation
10.1 With the protection device and monitoring system firmly grounded, initiate transformer operation with no-load. Conduct three shock closings to verify and fine-tune the protection system.
10.2 Post-delivery, connect the HV side's voltage regulation tap to the rated position. Adjust voltage during operation as per the product name plate's tapping voltage, with transformer power supply cut off for safe adjustments. HV side is connected according to the rated position. The voltage adjustment is required during operation, and the corresponding tapping connection can be carried out according to the tapping voltage indicated on the product name plate (when there is no excitation voltage regulation), and the voltage must be carried out in the case of cutting off the transformer power supply.
10.3 The transformer employs the BWDK series temperature controller. Positioned at the low-voltage coil's upper end, it detects and displays the three-phase coil's working temperatures. Upon reaching set temperatures, it can initiate fan operation, stop, alarm, trip, with adjustable settings per the thermostat manual.

11. Maintenance
Essential maintenance checks should be performed on the dry transformer at intervals, cutting off power for safety.
11.1 Inspect coils, iron core, wire seals, tap-connecting terminals, and fasteners for any signs of damage, deformation, loosening, discoloration, overheating, or corrosion. Address any abnormalities promptly to prevent operational damage.
11.2 Thoroughly clean the transformer, wiping accessible parts with a dry cloth. Avoid volatile cleaners. Use compressed air to clean hard-to-reach areas within the iron core coil.
11.3 For transformers equipped with fans, remove dust and debris from the fan and check the fan bearing's grease, replenishing or replacing it if needed.
11.4 After completing the thorough inspection and maintenance, ensure heightened vigilance by meticulously verifying that no metallic or non-metallic foreign objects have inadvertently been left behind in the coil, iron core, and insulation components before the transformer is reactivated.


12. Security Matters
12.1 The power supply for the temperature controller (and fan) should be routed through the switch panel, instead of a direct connection to the transformer, ensuring a secure system. 12.2 Prior to activating the transformer, it is imperative to conduct a rigorous examination of the grounding system within the transformer room.
12.3 For optimal safety in electricity usage, the door of the transformer shell must be securely closed at all times.
12.4 Implement effective measures to prevent small animals from entering the transformer room to avert any unwarranted incidents.
12.5 Personnel entering the transformer room should wear insulated footwear, maintain a safe distance from live parts, and avoid any contact with the transformer to ensure utmost safety.
12.6 Should there be a sudden increase in transformer noise, immediate attention is required to assess the transformer load and power grid voltage, closely monitor any temperature variations, and promptly consult with the relevant personnel.
12.7 It is advisable to conduct a comprehensive inspection of the transformer every 3-5 years, including performing preventive tests during this period.
12.8 Only qualified professionals should undertake the installation, testing, operation, and maintenance of transformers to ensure 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.