ZTelecgroup: Powering Industries with Premium Electrical Transformers Since 1958
03-06 2025 | By:
As a leading electrical transformer manufacturer rooted in China, ZTelecgroup has been at the forefront of innovation since its establishment in 1958. With over six decades of expertise, the company specializes in designing and producing high-performance industrial electrical transformers, up to 35kV transformers, tailored for diverse applications in energy distribution, manufacturing, and infrastructure development.
I. Common Capacities
Power distribution transformers typically have capacities ranging from 30 kVA to 6300 kVA, depending on application requirements:
Low Capacity (30–500 kVA): Used for residential buildings, small commercial complexes, and rural electrification.
Medium Capacity (500–2500 kVA): Suitable for industrial plants, hospitals, and urban distribution networks.
High Capacity (2500–6300 kVA): Deployed in large industrial facilities, renewable energy farms (e.g., solar/wind), and urban substations.
Rated Voltage:
Primary voltage: 10 kV, 20 kV, or 35 kV.
Secondary voltage: 0.4 kV (400 V for low-voltage grids).
Short-Circuit Impedance: Typically 4%–6%, ensuring stable operation during faults.
No-load Losses: Ranging from 100 W to 1500 W, depending on core material (e.g., amorphous alloy cores reduce losses by 70% compared to silicon steel).
Load Losses: Proportional to the square of the load current, optimized via high-conductivity windings.
Cooling Methods:
Oil-Immersed: Natural convection (ONAN) or forced cooling (ONAF).
Dry-Type: Air-cooled or epoxy resin-encapsulated for fire safety.
III. Common Models
Oil-Immersed Transformers:
S11/S13-M Series: Energy-efficient models with reduced no-load losses, widely used in urban grids.
S9 Series: Older models being phased out due to higher energy consumption.
Dry-Type Transformers:
SCB10/SCB13: Epoxy resin-cast models for indoor installations (e.g., hospitals, airports).
Amorphous Core Transformers:
SH15-M Series: Ultra-low no-load losses (20% of S11), ideal for rural grids with fluctuating loads.
IV. Application Scenarios
Urban Power Distribution:
Dry-type transformers (e.g., SCB10) in high-rise buildings for fire safety.
Industrial Zones:
Oil-immersed transformers (e.g., S11-M) with capacities up to 2500 kVA for heavy machinery.
Renewable Energy Integration:
High-capacity transformers (e.g., 35 kV/6300 kVA) for solar/wind farms to step up voltage for grid transmission.
Rural Electrification:
Amorphous-core transformers (e.g., SH15-M) to minimize losses in low-load conditions.
Conclusion
Power distribution transformers are tailored to specific voltage levels, load demands, and environmental conditions. Key trends include the adoption of amorphous alloy cores for energy efficiency and compact designs for urban installations. For detailed specifications, refer to technical standards like IEC 60076 and manufacturers’ catalogs
ZTelecgroup stands as a testament to China’s industrial prowess, combining heritage craftsmanship with cutting-edge technology. Whether you seek a cost-effective distribution transformer or a customized industrial electrical transformer for sale, their solutions empower industries to thrive sustainably.
Contact ZTelecgroup today to explore how their transformers can electrify your next project!
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