Transformers
Oil Type Distribution Transformers
This product is an oil-immersed distribution transformer designed to efficiently step down medium voltage levels (3.3–36 kV) to low voltage levels (≤ 1000 V) with capacities up to 5000 kVA. It is widely used in city transmission lines, industrial facilities, and power plants. The transformer is available in both single-phase and three-phase configurations, with cooling systems such as ONAN (Oil Natural Air Natural), ONAF (Oil Natural Air Forced), ODAF (Oil Directed Air Forced), OFAF (Oil Forced Air Forced), and OWAF (Oil Water Air Forced) to suit various operational needs.
The transformer comes in two main types based on tank design:
– Hermetic Oil Type Distribution Transformers: These transformers are designed to prevent the cooling oil from contacting the atmosphere, ensuring a longer lifespan without the need for regular oil changes. They are compact, making them suitable for smaller spaces, and feature a vacuum-sealed design that balances oil pressure and atmospheric pressure. The internal heat is managed through natural contraction and expansion of the tank walls, eliminating the need for external conservator tanks. They are ideal for both indoor and outdoor use.
– Transformers with Conservator Tanks: These transformers include a conservator tank that accommodates oil volume changes due to temperature fluctuations. Since the oil is exposed to the atmosphere, they require periodic maintenance, such as replacing silica gel (air dryer) and testing oil quality to prevent moisture absorption and degradation. They are robust and reliable for outdoor applications.
Both types of transformers can be customized with features such as off-load or on-load tap changers, cable or protection boxes, and bushings with ceramic or resin-type plug-in insulators. They are manufactured in compliance with international standards such as TS 267, IEC 60076-1, BS 171, DIN, ANSI, ENEL, ENDOSA, and CSA, ensuring high quality and reliability. The transformers are designed to meet specific customer requirements, offering flexibility, durability, and efficient performance in diverse applications.
Dry Type Transformers
This product is a cast resin dry-type transformer, designed for applications requiring high safety, environmental friendliness, and low maintenance. It is manufactured for power ratings up to 25 MVA and voltage levels up to 36 kV, making it suitable for a wide range of indoor and outdoor applications, including industrial facilities, power plants, hospitals, schools, airports, shopping malls, metros, oil platforms, and renewable energy installations like wind plants.
Key Features and Advantages:
1. Cooling and Efficiency:
– Available in natural air-cooled (AN) or fan-cooled (AF) options.
– Fan cooling can increase the transformer’s power output by up to 40%.
– Operates with minimal noise levels, making it ideal for urban and sensitive environments.
2. Safety and Environmental Benefits:
– Non-flammable and self-extinguishing, significantly reducing fire risks compared to oil-type transformers.
– Contains no toxic chemicals or oils, making it environmentally friendly and safe for human health.
– Maintenance-free and resistant to moisture, ensuring reliable operation even after long periods of inactivity.
3. Advanced Manufacturing Technology:
– High-voltage (HV) windings are coated with epoxy cast resin under vacuum, while low-voltage (LV) windings can be produced using either cast resin or resin-impregnated prepreg methods.
– Utilizes advanced technologies such as “cast resin with fiberglass under vacuum” and “cast resin with quartz,” ensuring high-quality, trouble-free performance.
– Partial discharge levels are kept below 5 pC, ensuring a long transformer lifespan.
4. Design Flexibility:
– Can be manufactured to meet F or H temperature class specifications, depending on customer requirements.
– Compact design takes up less space compared to oil-immersed transformers of the same rating.
– Coils can be replaced on-site if needed, providing additional flexibility and cost savings.
5. Operational Advantages:
– No need for oil changes or drying processes, even after prolonged deactivation.
– Can be installed near load centers, minimizing cable investment costs.
– Suitable for use in communal and high-traffic areas due to its safety and environmental benefits.
Comparison with Oil-Type Transformers:
– Dry-type transformers eliminate the risks associated with oil, such as leaks, fires, and environmental contamination.
– While they have a higher initial cost compared to oil-type transformers, their long-term benefits, including lower maintenance and operational risks, make them increasingly preferred in modern applications.
This cast resin dry-type transformer is a reliable, efficient, and sustainable solution for modern power distribution needs, combining advanced technology with safety and environmental consciousness.
Power Transformers
This product is a high-voltage oil-immersed power transformer, designed and manufactured to meet the most demanding requirements of modern power systems. With a production capacity of up to 1000 MVA and 800 kV, these transformers are tailored for use in electricity transmission lines, industrial plants, power generation centers, and internal electrical needs. They are engineered to comply with national and international standards, including IEC, IEEE, TS 267, EN 60076-1, BS 171, DIN, ANSI, ENEL, ENDOSA, and CSA.
Key Features and Advantages:
1. Custom Design and Optimization:
– Each transformer is designed with a tailor-made approach, considering specific operational and environmental conditions.
– Advanced design optimization ensures a balance between labor, material costs, and performance.
– Key design considerations include loss evaluation, low noise levels, voltage stress distribution under impulse lightning, and behavior during short-circuit conditions.
2. High Reliability and Performance:
– Rigorous testing and analysis are conducted to ensure reliability, including transient electrodynamics, thermal withstand analysis, and insulation structure optimization.
– Stray losses and thermal effects are carefully calculated to enhance efficiency and durability.
– Transformers are designed to withstand high electrical stresses and extreme operating conditions.
3. Wide Range of Applications:
– Suitable for electricity transmission networks, industrial facilities, power generation plants, and internal electrical systems.
– Proven performance in high-capacity applications, such as the successful commissioning of a **675 MVA, 400 kV step-up transformer**.
4. Advanced Manufacturing and Testing:
– Equipped with state-of-the-art facilities and expert engineering teams to handle design, production, testing, site assembly, and maintenance.
– Prototypes undergo rigorous testing, including short-circuit mechanical strength tests at internationally accredited laboratories like KEMA.
5. Technical Specifications:
– Power range: 5 MVA to 1000 MVA.
– Voltage levels: Up to 800 kV.
– Cooling systems: Optimized for efficient heat dissipation and long-term reliability.
– Low noise levels and high efficiency, ensuring minimal environmental impact.
Commitment to Quality:
– Transformers are produced to meet customer-specific requirements, contract conditions, and international standards.
– Focus on delivering the highest quality products, ensuring customer satisfaction and operational excellence.
This high-voltage oil-immersed power transformer is a robust, reliable, and efficient solution for modern power transmission and distribution networks, combining advanced engineering with a commitment to quality and performance.