Dry Cell Transformer

• This series of SCB14 dry-type power transformers is a new generation of high-efficiency, energy-saving, safe, and environmentally friendly distribution transformers. They are designed and manufactured strictly in accordance with national standards GB1094.1～1094.5 "Power Transformers", GB/T10228 "Technical Parameters and Requirements for Dry-Type Power Transformers", and GB6450 "Dry-Type Power Transformers" . The products adopt a high-permeability silicon steel core, oxygen-free pure copper windings, and a vacuum epoxy casting and curing process. They possess outstanding advantages such as fire resistance, maintenance-free operation, low loss, low noise, moisture resistance, short-circuit resistance, and no pollution, completely solving the safety hazards of oil-immersed transformers, such as oil leakage, fire, explosion, and environmental pollution.
• This equipment is an indoor dry-type power distribution device. It contains no fuel oil and relies on natural air cooling or forced air cooling for heat dissipation. It has stable insulation performance, safe and reliable operation, and strong overload capacity. It is suitable for indoor power distribution scenarios with extremely high requirements for fire prevention, environmental protection, and safety, such as high-rise buildings, commercial complexes, hospitals, schools, subways, data centers, industrial and mining enterprises, and fire protection power distribution. It is the preferred energy-saving power transformer for urban power distribution, fire protection power supply, and key projects.

SCB14 - □ / 10

• S: Three-phase power transformer
• C: Epoxy resin casting type
• B: Foil winding structure
• 14: Energy Efficiency Rating 14 (Ultra-High Efficiency Energy-Saving Series)
• □: Rated capacity (kVA): 30～2500kVA
• 10: Rated high voltage 10kV (35kV optional)

■ High-permeability magnetic core assembly (low-loss core)

The core of this transformer is made of high-permeability, low-loss cold-rolled grain-oriented silicon steel sheets, using a fully oblique joint, no-punching, multi-stage step lamination process to effectively reduce hysteresis and eddy current losses, and significantly reduce no-load current and no-load losses. The core is clamped and fixed by a special steel structure, ensuring stability and strong shock resistance, effectively suppressing electromagnetic vibration, reducing equipment operating noise at its source. The magnetic circuit distribution is uniform, temperature rise is stable, and there are no issues with magnetic aging or increased noise during long-term operation, resulting in excellent energy-saving performance.

■ Pure copper epoxy cast winding (safe and durable core)

Both the high-voltage and low-voltage windings are made of 100% oxygen-free pure copper . The low-voltage winding adopts a foil-type integral structure, while the high-voltage winding adopts a segmented cylindrical structure. This ensures balanced ampere-turns, uniform electric field distribution, extremely high mechanical strength, and strong short-circuit withstand capability. The entire winding is cast with imported epoxy resin under vacuum and cured at high temperature to form a dense and hard insulating whole, free of air bubbles and impurities, exhibiting excellent insulation performance.

The casting body has the characteristics of moisture-proof, dust-proof, stain-proof, flame-retardant and self-extinguishing. It is not afraid of moisture condensation and dust pollution, and eliminates the faults of inter-turn and inter-layer breakdown of windings. It is safe and stable in operation, has a long service life, and is fully suitable for long-term uninterrupted indoor operation.

■ Cooling and Temperature Control System (Core of Constant Temperature Operation)

The equipment is equipped with AN natural air cooling for normal operation, requiring no auxiliary equipment. It relies on air convection for natural heat dissipation to meet the rated load for long-term operation. Under heavy load and high temperature conditions , AF forced air cooling can be activated , with bottom axial flow fan assisting in heat dissipation, which greatly improves overload capacity and heat dissipation efficiency.

Equipped with a standard intelligent temperature controller, it monitors the three-phase winding temperature in real time and features temperature display, over-temperature warning, over-temperature trip, and automatic fan start/stop functions. It automatically starts and stops the cooling fan based on the winding temperature, and automatically alarms and cuts off power when the temperature is too high, preventing overheating and winding burnout, achieving fully automatic unattended temperature control protection.

■ Non-excitation voltage regulation and protection structure

The high-voltage side is equipped with a non-excitation tap changer with multiple voltage adjustment levels of ±2×2.5%, allowing manual adjustment of the output voltage even during power outages based on grid voltage deviations, adapting to different power supply conditions in various distribution areas. The equipment casing is made of steel plate with an IP20/IP30 protection rating, effectively preventing accidental contact with live parts and preventing foreign objects from entering the equipment, ensuring high safety, a neat design, and aesthetically pleasing installation.

■ Safety and Environmental Protection Characteristics

This equipment contains no transformer oil, poses no risk of leakage, and operates without smoke, toxic substances, or pollution. It does not produce harmful gases upon combustion, is flame-retardant and self-extinguishing, and will not explode, ensuring extremely high fire safety. The equipment is resistant to moisture and contamination, and can operate stably for extended periods in high-humidity, dusty indoor environments without the need for regular oil changes or filtration, truly achieving maintenance-free operation.

1. Indoor power distribution systems for high-rise buildings, residential communities, commercial complexes, office buildings, and hotels;

2. Key power distribution locations in public buildings such as hospitals, schools, stadiums, and libraries;

3. Enclosed power distribution spaces in data centers, computer rooms, rail transit, subways, and tunnels;

4. Fire prevention and power distribution scenarios in chemical plants, flammable and explosive material handling areas, fire pump rooms, and fire control rooms;

5. All indoor 10kV/0.4kV power distribution systems with high requirements for fire prevention, environmental protection, noise control, and safety.

■ Installation Environment Requirements

1. The equipment is for indoor use only and is installed in a dedicated power distribution room or transformer room. It is located in a well-ventilated and dry place, free from flammable and explosive materials, corrosive gases, and severe dust.

2. The installation ground is flat and firm, the levelness meets the standard, the equipment is firmly fixed on the ground, and there is no tilting or vibration;

3. Ensure good indoor ventilation and reserve sufficient space for heat dissipation and maintenance; do not seal or block the heat dissipation channels of the equipment.

4. The equipment must be reliably grounded with a grounding resistance of ≤4Ω to ensure the safety of personnel and equipment operation;

5. The ambient temperature should be controlled between -10℃ and +40℃. It is forbidden to install and use it outdoors in the rain or under the sun.

■ Pre-installation inspection

1. Check that the equipment is in good overall condition, with no cracks, damage, or dirt accumulation in the cast windings, and no deformation in the core or outer shell;

2. Verify that the equipment model, capacity, and voltage parameters are consistent with the design, and that the tap changer, temperature controller, and fan accessories are complete and in good working order;

3. Use a 2500V megohmmeter to measure the insulation resistance between high voltage and ground and between high voltage and low voltage, and a 500V megohmmeter to measure the insulation resistance between low voltage and ground. The insulation values are qualified and there is no breakdown or leakage.

4. Check that all wiring terminals are secure and not loose, and that there are no foreign objects or tools left inside the equipment.

■ Wiring and Power-on Specifications

1. Strictly follow the phase sequence when connecting high-voltage incoming lines and low-voltage outgoing lines, ensure that the wiring is secure and compacted, and ensure that the busbar connection insulation protection is in place to eliminate the hidden dangers of loose connection, phase reversal, and short circuit;

2. The equipment's working ground and protective ground must be reliably connected separately; mixing ground and neutral ground is strictly prohibited.

3. Voltage adjustment must be performed only after the power is completely cut off, the voltage is tested, and the voltage is fully discharged . After adjusting the voltage level, lock the switch and verify that the voltage level is consistent.

4. After the initial power-on and no-load test run for 2 hours, check that the equipment has no abnormal noise, no abnormal temperature rise, and no alarms. After the voltage stabilizes, gradually operate under load.

5. Natural air cooling should be prioritized for daily operation. Forced air cooling should be used when under heavy load and high temperature. Long-term operation under excessive temperature or overload is prohibited.

1. Routine inspection: Observe the equipment's operating sound, temperature display, and temperature controller status. There should be no abnormal alarms, no local overheating, no abnormal discharge noises, and the low voltage and current should be stable.

2. Quarterly maintenance: Clean dust and debris from the windings, iron core, and fan surface; check the tightness of the wiring terminals; and test the fan start/stop and temperature control alarm functions.

3. Annual maintenance: Conduct a comprehensive inspection of the winding insulation resistance, verify the accuracy of the temperature controller and the over-temperature protection tripping function, and check the casting body for cracks, aging and dirt accumulation.

4. Special maintenance during humid seasons: Strengthen indoor ventilation and dehumidification to prevent condensation on the winding surface and avoid discharge faults caused by reduced insulation.

5. The equipment requires no daily consumable maintenance, no oil changes or replenishment, and it is forbidden to grind, cut, or modify the casting winding structure without authorization.

1. Equipment installation, voltage regulation, maintenance, and testing must be performed by certified high-voltage electricians, and high-voltage electrical safety operating procedures must be strictly followed.

2. During the operation of the equipment while it is energized, it is strictly forbidden to open the protective casing, touch the high-voltage terminals and winding parts, and to prevent any violations of regulations.

3. All maintenance, voltage regulation, and cleaning operations must follow the safety procedures of power disconnection, voltage testing, grounding, and discharge to prevent electric shock from residual high voltage;

4. It is strictly forbidden to operate the equipment for extended periods under excessive temperature or load. It is also strictly forbidden to alter temperature control parameters, remove protective devices, or modify the equipment structure without authorization.

5. The power distribution room should be kept well-ventilated, dry, clean and dust-free. It is forbidden to pile up debris or flammable and explosive materials to ensure the heat dissipation and safe operation of the equipment.

6. The equipment grounding system must be intact and reliable. It is strictly forbidden to remove the grounding device. The grounding resistance must be tested regularly to ensure it meets the standards.

This product is manufactured and inspected in strict accordance with national power standards. Before leaving the factory, it undergoes a full range of tests, including transformer ratio testing, insulation testing, no-load and load testing, temperature rise testing, withstand voltage testing, and short-circuit impulse testing, to ensure it meets quality standards. The product comes with a 24-month warranty. During the warranty period, the manufacturer will repair or replace parts free of charge for equipment failures not caused by human error or force majeure. Failures caused by unauthorized modification, improper operation, overloading, human-caused damage, harsh environments, or natural disasters are not covered by the warranty.