1. By Insulation & Cooling Medium Dry-Type Transformer (e.g., epoxy resin cast SCB type, H-class insulated SGB type) Oil-Immersed Transformer 2. By Core Material / Structure Silicon steel laminated core transformer Silicon steel wound core transformer Amorphous alloy core transformer 3. By Energy Efficiency Standard SJ, S7, S9, S11, S13, S15 series (higher series indicates better energy efficiency) 4. By Phase Type Single-phase transformer Three-phase transformer 5. By Capacity (kVA Rating) Common standardized ratings include: 50, 80, 100, 125, 160, 200, 250, 315, 400, 500, 630, 800, 1000, 1250, 1600, 2000, 2500, 3150, 4000, and 5000 kVA, following standard R10 preferred series values.
Function: In photovoltaic power systems, a PV step-up transformer plays a key role in power conversion and grid integration. It converts the generated electricity into a grid-compatible form, increases voltage for efficient transmission, and provides electrical isolation. It also helps stabilize power quality and protects PV equipment from grid voltage fluctuations, ensuring safe and reliable system operation. Applications: PV step-up transformers are widely used in solar power systems of different scales: Residential PV systems: Support grid connection and allow users to consume solar power and export surplus energy. Commercial PV systems: Help businesses reduce electricity costs and improve energy efficiency. Utility-scale solar plants: Essential equipment for large photovoltaic power stations, enabling stable transmission and supporting clean energy transition.
1. Power (Generation) Transformers: Used in power plants to step up voltage for long-distance transmission. They are typically high-capacity and high-voltage units. 2. Transmission Transformers: Installed in transmission systems to transfer electricity over long distances between generation and distribution networks, reducing energy loss through high-voltage operation. 3. Distribution Transformers: Used in urban and rural distribution networks to step down high voltage to usable levels for residential, commercial, and industrial users. This is the most common type in box substations. 4. Special-Purpose Transformers: Custom-designed for specific industrial applications such as metallurgy, electric furnaces, and welding systems, with tailored performance and operating requirements.
1 - Strong Overload Capability: Capable of continuous operation at 2× load for 2 hours or 1.6× load for 7 hours without affecting service life. 2 - Convenient High-Voltage Connection System: Uses elbow-type plug-in connectors to simplify cable installation and support live operation as a load switch. 3 - Dual Fuse Protection System: Includes BAY-o-net and ELSP fuses for coordinated protection of secondary and primary sides. 4 - High Flash Point Insulating Oil: Uses FR3 high flash point oil to improve fire safety performance. 5 - Integrated Design: All key components are integrated in a single tank for compact structure and easy maintenance.
1. Lower Noise and Higher Safety: Installing equipment underground helps reduce noise pollution and minimizes operational risks by protecting the system from external interference. 2. Better Temperature Control: The underground environment provides more stable and cooler conditions, improving transformer performance, efficiency, and reliability. 3. Space-Saving and Easy Installation: It requires very little surface space (typically less than 6 m² above ground), and most components are prefabricated in the factory, allowing for fast on-site installation and shorter construction time compared to traditional substations.
1. Enclosure Structure: The enclosure includes a base, housing, and roof. It is typically made of steel or aluminum materials, designed with ventilation openings and cable entry points to ensure proper heat dissipation and easy cable installation. 2. High-Voltage (HV) Compartment: The HV unit supports both terminal and ring main configurations, with options for overhead or underground cable incoming lines, depending on project requirements. 3. Transformer Compartment: This independent chamber houses the transformer along with temperature control, lighting, and safety protection systems to ensure stable and safe operation. 4. Low-Voltage (LV) Compartment: The LV section distributes power to end users. Its design varies by application—industrial projects may separate power and lighting circuits, while residential use focuses on standard power distribution.
