400kVA 3-Phase Oil Cooled Distribution Transformer

Our company is one of the prime manufacturers and suppliers of 400kVA 3-Phase Oil Cooled Distribution Transformer that goes about as an encasing and a cooling specialist. This item is an electrical mechanical assembly intended to change rotating flow starting with one voltage over then onto the next. It is planned and created by utilizing high quality required materials with the help of most recent innovations. Before final dispatch, Distribution Transformer is checked on different standard parameters by our experts in order to deliver defect free range.

Product details

Power Rating	400kVA
Phase	3-Phase
Voltage Ratio	11kV/433V
Cooling Type	Oil Cooled
Winding Material	Copper

High Efficiency and Superior Materials

The 400kVA distribution transformer delivers excellent efficiency up to 98.5% thanks to its top-grade CRGO M4 silicon steel core and copper wound coils. The transformer's double-wound coil structure ensures robust performance, while the foil/strip winding methodology enhances electrical insulation and operational longevity. Its design adheres to international standards, offering durability and reliable output in power distribution networks.

Rugged Protection and Outdoor Suitability

Engineered for outdoor installations, this transformer features a hermetically sealed tank with anti-corrosive epoxy finish, enabling it to withstand challenging weather conditions and relative humidity up to 95%. Built-in safety features such as Buchholz relay, pressure relief valve, and oil level indicator offer additional operational security and system monitoring.

Adaptable Mounting and Operational Flexibility

Suitable for both pole and plinth mounting, the transformer can be seamlessly integrated into a variety of urban, industrial, and rural power distribution systems. The off-circuit tap changer facilitates manual voltage adjustment, ensuring optimal performance even with grid voltage fluctuations. It is designed for ease of transport and installation, with an approximate weight of 1800 kg and compact dimensions.

FAQ's of 400kVA 3-Phase Oil Cooled Distribution Transformer:

Q: How is the 400kVA 3-phase oil-cooled distribution transformer installed and where can it be used?

A: This transformer can be installed on poles or plinths, making it suitable for outdoor environments such as utility distribution networks, industrial facilities, commercial complexes, and rural power stations. Its robust, hermetically sealed construction and anti-corrosive finish enable reliable operation in varied climates.

Q: What protection features does the transformer offer during operation?

A: The transformer is equipped with a Buchholz relay for internal fault protection, a pressure relief valve to release excess pressure, and an oil level indicator for monitoring insulation oil. These features enhance system safety and operational reliability.

Q: When should the off-circuit tap changer (OCTC) be used, and what are its adjustment ranges?

A: The off-circuit tap changer is used when the transformer is de-energized to adjust output voltage according to grid requirements. Adjustment is possible at 2.5% and 5%, allowing operators to maintain voltage stability and efficient performance.

Q: What materials are used in the core and windings, and how do they benefit transformer performance?

A: The core is made of CRGO M4 silicon steel, while windings utilize copper and foil/strip technology. These materials minimize losses, enhance efficiency (up to 98.5%), and provide superior durability for long-term service.

Q: How does the ONAN cooling system work in this transformer?

A: ONAN (Oil Natural Air Natural) uses mineral oil as a cooling medium, which absorbs heat from the windings and disperses it through natural air convection. This method ensures efficient temperature control without external fans or pumps.

Q: What standards does the transformer comply with and what is the benefit?

A: It is manufactured in accordance with IS 1180 and IEC 60076 standards, ensuring high performance, safety, and compatibility with widespread distribution network requirements.

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