High-voltage distribution transformer
SEA
The SEA TTO transformers are immersed in insulating liquid. As they can be used outside within the most difficult industrial environments and their price is competitive, the SEA TTO Transformers represent the ideal solution for every industrial installation. They are available in the version with oil conservator or hermetic type with integral filling which requires less maintenance because the oil does not come in contact with the air. They are usually filled with PCB and PCT-free mineral oil. TTO transformers may also be requested with greater fire safety silicon oil filling IEC60836 or synthetic ester based like MIDEL7131®. This fluid is biodegradable and non-hazardous, safe for use even in the most ecologically-sensitive areas. They have a flexible body with ondulated sheet enabling the oil to dilate during the normal thermal cycling of the transformer.
STANDARDS REFERENCE
The SEA TTO transformers comply with the IEC and DIN Standards.
On request, transformers in compliance with other international Standards or with the Customer’s specifications may be manufactured.
RANGE
Our standard catalogne covers up to 3150 kVA. The conditions of the standard design are:
• Maximum room temperature: 40°C
• Oil temperature rise: 60 °C
• Winding temperature rise: 65 °C
• Installation: up to 1000 m asl
• Frequence: 50 or 60 Hz
• Connection group: Yzn up to 50 kVA – Dyn over 50 kVA
• MV voltage: up to 36 kV
• MV adjustment: ±2x2,5%
• LV voltage: from 400 to 433 V at no load
