Project Background

As urbanization accelerates, the number of high-rise residential communities is on the rise, resulting in increased demands for both quality and stability in power supply.

One specific high-rise residential community faced challenges due to the aging equipment of its original power supply system, which was unable to meet current and future electrical load requirements. Consequently, it was decided to undertake a comprehensive upgrade of the power supply system. A critical aspect of this upgrade was selecting the appropriate transformer.

After extensive research and evaluations, the 10kV/0.4kV dry-type transformer was ultimately chosen as the core component of the upgrade plan.

Transformer Selection and Configuration

• Model: SCB14 Series Dry-Type Transformer
• Capacity: 2 units × 1600kVA
• Rated Voltage: 10kV/0.4kV
• Tap Range: ±2×2.5%
• Cooling Method: Natural Air Cooling
• Insulation Class: F Class
• Protection Class: IP20
• Connection Group: Dyn11

Project Implementation

• Foundation Construction: A stable foundation was designed and constructed to accommodate the size and weight of the transformer, ensuring its stability and safety post-installation.
• Equipment Installation: Following the completion of the foundation, the dry-type transformer was hoisted into position, leveled, and secured. High and low voltage cables were subsequently connected to guarantee the reliability and safety of electrical connections.
• Debugging and Testing: Upon installation completion, comprehensive debugging and testing were conducted, including insulation resistance tests, direct current resistance tests, and transformation ratio tests, to ensure that the transformer met the specified performance criteria.
• Protection Configuration: Overcurrent protection, instantaneous protection, and gas protection measures were installed to ensure the transformer can quickly disconnect from the power supply in the event of a fault, thereby preventing escalation of accidents.

Operational Effectiveness and Benefits

• Enhanced Power Supply Quality: The dry-type transformer offers excellent electrical performance and stability, ensuring consistent and improved power supply quality that meets the high demands of the residential community.
• Reduced Maintenance Costs: With no need for oil immersion or cooling systems, the dry-type transformer offers simplified maintenance, thereby reducing overall costs. Its long lifespan also decreases the frequency and expenses associated with equipment replacement.
• Environmental Protection and Energy Savings: The dry-type transformer is free from oil pollution and adheres to environmental regulations. Its low energy losses result in significant energy savings, helping to lower the community’s electricity expenses.
• Improved Safety: Featuring fire and explosion-proof capabilities, the dry-type transformer ensures the safe operation of the community’s power supply system while minimizing the risk of safety incidents.

The implementation of the 10kV/0.4kV dry-type transformer to upgrade the power supply system of the high-rise residential community has successfully enhanced power supply quality, reduced maintenance costs, achieved environmental protection and energy savings, and improved safety. This case serves as a valuable reference and model for similar upgrades in other high-rise residential communities.