200kVA 11/0.4kV Three Phase Power Transformer

1. Product Overview

The 200kVA 11/0.4kV three-phase power transformer is a standard step-down distribution transformer designed for industrial, commercial and municipal power distribution systems. Developed and manufactured in strict accordance with IEC international standards and national power industry specifications, this transformer serves as a core power conversion device to convert 11kV high-voltage industrial and grid power into 0.4kV low-voltage usable power for end-user equipment.

Adopting mature electromagnetic design and high-quality core and winding materials, the equipment features stable voltage conversion, reliable continuous operation and strong load adaptability. It can operate stably under long-term full-load and partial-load conditions, effectively solving the voltage matching problem between high-voltage power grids and low-voltage electrical equipment. This model is one of the most widely used conventional distribution transformers in small and medium-sized power distribution stations, factory power distribution rooms and community power supply projects, with excellent practicality and cost performance in actual engineering applications.

2. Product Technical Parameters

The following are the core standard technical parameters of the 200kVA 11/0.4kV three-phase transformer, covering electrical performance, structural specifications and operating conditions, which fully meet the conventional power distribution operation requirements:

3. Core Product Features

This 200kVA 11/0.4kV three-phase transformer has been optimized in design, material selection and production process, with prominent advantages in energy saving, stability, safety and service life compared with ordinary transformers:

3.1 Excellent Energy-Saving Performance

The transformer adopts high-quality silicon steel sheet core with fine cutting process, which effectively reduces no-load loss and no-load current. The overall energy consumption is far lower than the industry basic standard, and it will not produce excessive energy waste during long-term continuous operation, helping users reduce daily power operation costs and achieve energy-saving and emission reduction goals.

3.2 Stable Voltage Output & Strong Anti-Interference Ability

With Dyn11 vector group design, the product has balanced three-phase output voltage, small voltage fluctuation and strong ability to resist grid voltage surge and unbalanced load interference. It can effectively stabilize the 0.4kV low-voltage output, avoid equipment damage caused by voltage instability, and ensure the normal operation of precision electrical equipment and production lines.

3.3 High Safety & Durability

The whole machine is made of high-insulation and flame-retardant materials, with standardized winding winding and sealed structural design. It is equipped with over-temperature, over-current and short-circuit protection functions, which can automatically isolate faults in case of abnormal operating conditions. The oil-immersed cooling structure ensures uniform heat dissipation, avoids local overheating, and greatly extends the service life of the transformer, with stable operation for more than 20 years under normal working conditions.

3.4 Simple Installation & Strong Adaptability

The product has a compact overall structure, small floor space and standardized interface design, which is convenient for on-site installation and wiring. It can adapt to various harsh working environments such as high temperature, low temperature and humid industrial sites, and has low requirements for on-site supporting conditions, with strong on-site applicability.

4. Product Application Scenarios

Relying on its stable performance and moderate capacity, this 200kVA 11/0.4kV three-phase transformer is widely used in various medium and small-scale power supply and power conversion scenarios, covering industrial, commercial, civil and public infrastructure fields:

• Industrial Production Sites: Suitable for power distribution of small and medium-sized factories, processing workshops, mechanical equipment supporting power supply, supporting voltage conversion of production lines, and providing stable low-voltage power for industrial electrical equipment.

• Commercial & Civil Buildings: Applied to power distribution systems of shopping malls, office buildings, residential communities, hotels and other places, responsible for converting grid high voltage into daily usable low voltage to meet the power demand of lighting, air conditioning and household electrical equipment.

• Public Infrastructure: Matching power supply for schools, hospitals, parks, road lighting and municipal supporting facilities, ensuring continuous and stable power supply for public service equipment.

• New Energy & Off-Grid Power Scenarios: Used for voltage matching and power distribution of small photovoltaic power stations, wind power supporting systems and temporary construction power supply projects, solving the problem of voltage conversion in decentralized power supply scenarios.

• Substation & Distribution Station: As terminal distribution equipment of urban and rural power grid substations, it undertakes the final voltage reduction and power distribution work of the power grid, and is an important part of the power grid terminal power supply system.

5. Product Daily Maintenance

Scientific and standardized daily maintenance can effectively ensure the long-term stable operation of the transformer, reduce failure rate and extend service life. The daily maintenance and inspection contents are as follows:

5.1 Routine Daily Inspection

Check the transformer body regularly every day to observe whether there is oil leakage, abnormal noise, abnormal temperature and smoke. Confirm that the oil level in the oil tank is within the standard range, and the casing and wiring terminals are clean and free of dust, dirt and oxidation corrosion. Check whether the voltage and current indicators are within the rated range to avoid long-term overload operation.

5.2 Regular Monthly & Quarterly Maintenance

Clean the dust and sundries on the surface of the equipment and heat dissipation parts monthly to ensure smooth heat dissipation. Quarterly, check the tightness of wiring terminals, fasten loose connectors, and detect the insulation resistance of the transformer winding. At the same time, check the working state of the voltage regulating switch and protection device to ensure flexible and effective operation.

5.3 Annual Comprehensive Maintenance

Carry out a comprehensive overhaul every year, including transformer oil quality testing, filter or replace deteriorated transformer oil, detect core and winding operating status, calibrate voltage and current parameters, and comprehensively check the aging degree of internal accessories. For parts with aging performance, replace them in time to eliminate potential safety hazards.

5.4 Maintenance Precautions

All maintenance operations must be carried out after power failure and grounding protection. Overload operation and long-term no-load idle operation are prohibited. Avoid external hard collision and extrusion of the equipment body, and ensure the ventilation and heat dissipation environment of the transformer room is unobstructed.

6. After-Sales Service Guarantee

We provide comprehensive and professional after-sales service support for all 200kVA 11/0.4kV three-phase transformers sold, to ensure customers have no worries in product use and operation:

• Warranty Service: The whole machine enjoys a 24-month quality warranty from the date of equipment installation and commissioning. During the warranty period, any quality failure caused by manufacturing process and material problems will be repaired and replaced free of charge, with zero cost for customer maintenance.

• Technical Support: Provide 24-hour online technical consultation service. Professional electrical engineers respond quickly to customer questions about equipment installation, commissioning, operation and maintenance, and provide targeted technical guidance solutions.

• On-Site Service: For on-site equipment faults that cannot be solved remotely, we arrange professional after-sales engineers to arrive at the site for maintenance and troubleshooting according to the regional distance, ensuring rapid recovery of equipment normal operation.