SCB and SC series transformers are both three-phase cast resin dry-type transformers, widely used in power distribution systems, industrial plants, and commercial buildings.Although they belong to the same category, there are significant differences in winding structure, temperature rise, loss performance, insulation strength, and short-circuit resistance. This article explains the key differences between SCB transformers and SC transformers in detail. 1. Difference in Winding Structure The biggest difference between SCB and SC series transformers lies in the low-voltage winding design. SCB Series – Copper Foil Winding SCB transformers use copper foil winding for the low-voltage coil. Features: Advantages: SC Series – Wire Wound Coil SC transformers use wire-wound cylindrical coils. Features: Compared with SCB: 2. Temperature Rise Difference The low-voltage winding is close to the core, so cooling performance is critical. SCB transformer advantages: Typical result: SCB temperature rise is about 5–7 K lower than SC. Benefits: 3. Load Loss Difference SCB transformers use oxygen-free copper foil, which has: Result: For the same rating and voltage level: SCB load loss is typically about 5% lower than SC. 4. Insulation Performance Difference SCB foil winding has: Advantages: This makes SCB transformers more suitable for: 5. Short-Circuit Withstand Capability SCB transformers perform better

In medium-voltage power distribution systems, grounding transformers (earthing transformers) play a critical role in system protection and reliability. Understanding their principles and applications is essential for engineers involved in 6 kV, 10 kV, and 35 kV networks. 1. What Is a Grounding Transformer? A grounding transformer is a special-purpose transformer used to create an artificial neutral point in systems where the neutral is not naturally available. Classification Main Function Grounding transformers provide a neutral point for ungrounded or isolated-neutral systems, allowing the connection of: This reduces capacitive earth-fault current during single-phase-to-ground faults and significantly improves power supply reliability. 2. Why Grounding Transformers Are Needed in MV Systems In many 6 kV / 10 kV / 35 kV distribution networks, the system operates with an ungrounded neutral. This allows some temporary faults to self-clear, improving supply continuity. 3. Problems Caused by Increased Capacitive Earth-Fault Current With urban grid expansion and the rapid increase in cable feeders, system-to-ground capacitance rises sharply. When capacitive earth-fault current exceeds 10 A, serious risks appear: Major Risks These phenomena can cause line tripping, equipment damage, and fault escalation, threatening safe grid operation. 4. Role of Grounding Transformers in Fault Current Compensation To reduce capacitive earth-fault current,

— Practical Reactive Power Compensation Explained by Kete Transformer In modern power distribution systems, reactive power compensation plays a critical role in voltage stability, power factor correction, loss reduction, and the safe operation of transformers, box-type substations, and industrial loads. Based on extensive experience in power transformers, distribution transformers, and box substations, Kete Transformer summarizes the practical roles and differences between SVG and SVC, two of the most widely used reactive power compensation solutions. 1. What Is SVG and What Does It Do? SVG (Static Var Generator) is a typical power-electronic-based reactive power compensation device. It mainly consists of three functional modules: How SVG Works in Power Systems The SVG control system continuously monitors grid current. Based on real-time analysis, the controller outputs a command signal to an inverter composed of self-commutated IGBT devices. The inverter then injects a precisely controlled compensation current into the grid. Technical Principle of SVG SVG uses a self-commutated bridge (voltage-source converter) connected to the grid through a reactor. By adjusting: the SVG can rapidly absorb or generate reactive power. As an active compensation device, SVG offers: This makes SVG especially suitable for applications where transformers are exposed to frequent load fluctuations, such as steel

By Kete Transformer A box-type transformer substation (also known as a prefabricated substation or package substation) is a compact outdoor power distribution system that integrates: All components are factory-assembled inside a sealed, corrosion-resistant, movable steel enclosure, designed for harsh outdoor environments. It combines:✔ Voltage transformation✔ Power distribution✔ Protection and monitoring into a single efficient unit, making it ideal for urban grids, industrial plants, renewable energy projects, and infrastructure development. What Is a Box-Type Substation? A box-type substation integrates: into one sealed metal enclosure. Key advantages: These substations are widely used in: ✔ Mines✔ Factories✔ Oil & gas fields✔ Wind farms✔ Residential communities✔ Construction projects They replace traditional civil-built substations with lower cost, faster deployment, and higher flexibility. Main Structure of a Box-Type Substation Box substations consist of three primary sections: 🔹 High-Voltage Compartment May include: 🔹 Transformer Compartment Usually equipped with: 🔹 Low-Voltage Compartment Includes: European-Type vs American-Type Box Substations Explained 🇪🇺 European-Type Box Substation Features: Pros:✔ Better system flexibility✔ Suitable for critical loads✔ Lower electromagnetic radiation Cons:✖ Larger size✖ Requires ventilation systems Best for:Residential complexes, high-rise buildings, industrial power supply 🇺🇸 American-Type Box Substation Features: Pros:✔ Small size✔ Easy installation✔ Lower project cost✔ Good heat dissipation Cons:✖ Limited automation✖

In power transmission and distribution systems, transformers are core equipment. As a professional transformer manufacturer, Kete Transformer believes that understanding transformer fundamentals is the basis for safe operation, correct selection, and long service life. With years of experience in power transformers, dry-type transformers, oil-immersed transformers, and box-type substations, Kete Transformer shares the following practical guide to help engineers, EPC contractors, and end users better understand transformer technology. 1. What Is a Transformer? A transformer is an electrical device used in AC power systems to step up or step down voltage while maintaining the same frequency. In real-world power systems: Kete Transformer designs and manufactures transformers that ensure efficient power transmission, minimal losses, and reliable long-term operation. 2. How Does a Transformer Work? Transformers operate based on electromagnetic induction. A typical transformer consists of: The voltage ratio depends on the turns ratio:V1V2=N1N2\frac{V_1}{V_2} = \frac{N_1}{N_2}V2​V1​​=N2​N1​​ By precisely controlling winding design and core material quality, Kete Transformer ensures: 3. Types of Power Transformers According to different application needs, Kete Transformer supplies: By Phase By Application By Cooling Method 4. Main Components of a Transformer A power transformer mainly includes: Auxiliary components: All components used by Kete Transformer comply with IEC / IEEE standards,