TSZNG

Three-phase dry-type power transformers of the TSZNG series in a hermetic tank with windings made of “NOMEX” insulated wire of thermal resistance class “H” (180°C), are two-winding general-purpose transformers with capacities from 10 to 100 kV·A and voltages up to 10 kV. They are used in various sectors of the national economy and industry, designed for converting electrical energy in three-phase AC power grids with a frequency of 50 Hz. These transformers are installed in industrial premises and public buildings that have increased requirements for fire safety, explosion protection, and environmental friendliness. A characteristic feature of these transformers is the ability to operate in outdoor installations with ambient temperatures ranging from -45°C to +40°C.

Structural Features

TSZNG series transformers have a well-thought-out design that ensures their reliability and durability in outdoor installations. Key structural elements are made from high-quality materials using modern manufacturing technologies.

• Magnetic Core: Manufactured from high-quality electrical steel. Special cutting on the “GEORG” line and “Step-Lap” stacking scheme are used to ensure low no-load losses and noise levels. The assembly of the magnetic core is carried out using bandages, tie rods, and special adhesives.
• Windings: LV (low voltage) and HV (high voltage) windings are made of wire or strip with “NOMEX” insulation; winding material is copper or aluminum. “NOMEX” insulation provides a high thermal resistance class “H” (180°C).
• Hermetic Tank: Transformers are manufactured in a hermetic tank with terminals on the lid. The internal volume of the tank is filled with inert gas under overpressure, which prevents the insulation from coming into contact with the environment.
• Corrosion Protection: Organosilicon paints are used for corrosion protection.
• Active Part Impregnation: The active part of the transformer is impregnated with organosilicon varnishes and processed in electric furnaces according to special temperature programs, ensuring resistance to short-circuit currents.
• Additional Elements: The design includes tap changers, LV and HV bushings, lifting lugs, a nameplate, a grounding bolt, a switch drive, transport rollers, a terminal box, a manometer, and a safety valve.

Technical Specifications of TSZNG Transformers

Main parameters of TSZNG type transformers

Dimensions

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Advantages of Using TSZNG Substations

The choice of TSZNG series transformers offers a number of significant advantages, especially for facilities with increased safety and reliability requirements, as well as for outdoor installation. Their structural features and applied technologies ensure efficient and safe operation.

• Increased Fire and Explosion Safety: Thanks to the use of dry insulation instead of oil, TSZNG transformers are significantly safer in terms of fire and explosion risk, making them an ideal choice for installation in public and industrial buildings.
• Outdoor Installation Capability: The hermetic tank design and extended operating temperature range (from -45°C to +40°C) allow these transformers to be operated outdoors without the need for protective structures.
• High Reliability and Durability: The hermetic design with inert gas filling protects the insulation from moisture, dust, and oxygen, significantly extending the transformer’s service life and reducing maintenance needs.
• Environmental Friendliness: The absence of transformer oil eliminates leaks and environmental contamination, which complies with modern ecological standards.
• Short-Circuit Resistance: Impregnation of the active part with special varnishes and a well-designed construction ensure high mechanical stability of the windings against dynamic loads arising from short circuits.
• Short-Term Overload Capability: Depending on the ambient temperature and previous load, transformers have a temperature reserve that can be used for permissible short-term overloads. 

Areas of Application

TSZNG series transformers find wide application due to their technical characteristics and high level of safety. They are an effective solution for facilities where reliable power conversion and enhanced fire and environmental safety standards are required.

• Industrial Enterprises: Used for power supply to workshops, production lines, and other equipment in various industries. 
• Public Buildings: Ideally suited for installation in shopping malls, office complexes, residential buildings, and other facilities with high occupancy, where fire safety is a priority. 
• Facilities with Increased Explosion Protection Requirements: Applied in explosive production environments and facilities due to their dry and hermetic design. 
• Facilities with Increased Environmental Requirements: The use of oil-free transformers complies with modern environmental standards and allows their installation in facilities where environmental cleanliness is important. 
• Outdoor Installations: Thanks to their hermetic design and wide operating temperature range, these transformers can be installed outdoors.

Compliance with Standards

TSZNG transformers are manufactured in compliance with national and international standards, which confirms their high quality, safety, and reliability. Production processes are also certified according to international quality management systems.

• IEC 76: Comply with the requirements of the international standard for power transformers.
• DSTU 3076-95 (GOST 30297-95): Comply with national standards of Ukraine and interstate standards related to power transformers.
• TU U3.49-00213440-059-2002: Manufactured in accordance with the technical specifications of Ukraine developed for this type of transformers.
• ISO 9001:2008: Production is certified under the international quality management system, guaranteeing consistently high product quality.
• GOST 15150-69: Climatic version and placement category (U1) comply with the requirements of this standard, which defines the operating conditions for products in various climatic zones.

To obtain precise transformer characteristics or to place an order, please contact the official representative of LLC “Ukreelektroaparat” or write to zakaz@uea.km.ua.