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ONDCE series single-phase traction transformers are key elements of electric rolling stock, designed to effectively convert the contact network voltage into the voltage required to power traction motors, excitation systems and circuits for the own needs of electric locomotives and industrial traction units. The high level of reliability and efficiency of these transformers ensures stable operation of electric transport even in difficult operating conditions.
Single-phase traction transformer type ONDCE-4350/25-U2-02
The transformer is designed to convert the voltage of the contact network into the voltage of the traction motor circuits through a rectifier unit and for the locomotive’s own needs.
Transformers — ONDCE-5700/25B-U2
Designed to convert the contact network voltage into the voltage of the traction motor circuits and their excitation circuits, the circuits of the electric locomotive’s own needs, the circuits of the electric locomotive’s power supply, as well as to convert the traction motor voltage into the contact network voltage in the recuperation mode, excitation of the traction motors and power supply of the electric train.
Transformers — ONDCE-8000/10-U2, ONDCE-8000/10B-U2
The transformer is designed to convert the voltage of the contact network into the voltage of the traction motor circuits through a rectifier unit and for the own needs of industrial electric locomotives (traction units).
Design features
ONDCE transformers have a specially designed design for open installation under the body of an electric rolling stock car, which ensures resistance to mechanical influences, vibrations and temperature fluctuations. The housing is made of materials resistant to aggressive environments, dust and moisture. Design features include:
- Cooling system that provides optimal thermal conditions.
- Anti-vibration mounts to reduce the impact of dynamic loads.
- Protective coating for operation in conditions of high humidity.
Technical characteristics of ONDCE transformers
Parameters of the transformer ONDCE-4350/25-U2-02
| Parameter | Value |
| Power supply frequency, Hz | 50 |
| Scheme and group of winding connections | 1/1/1/1/1-0-0-0-0 |
| Nominal power of the network winding (MO), kV·A | 4352 |
| Nominal voltage of the mains winding (MO), kV | 25 |
| Rated current of the mains winding (MO), A | 174,1 |
| Nominal power of traction windings (ТО1, TO2), kV·А | 2х2016 |
| Rated voltage of traction windings (TO1, TO2) at the inputs, V | 1260 (a1-x1; a2-x2), 630 (a1-2; 2-x1; a2-4; 4-x2), 315 (a1-1; 1-2; a2-3; 3-4) |
| Rated current of traction windings (TO1, TO2), A | 1600 |
| Nominal power of the excitation winding (OZ), kV·A | 117 |
| Nominal voltage of the excitation winding (OV) at the inputs, V | 90 (a3-5; 5-x3), 180 (a3-x5) |
| Rated current of the excitation winding (OZ), A | 650 (a3-x3), 900 (5) |
| Nominal power of the winding of own needs (OVP), kV·A | 202,5 |
| Nominal voltage of the self-consumption winding (SW) at the inputs, V | 405 (a4-x4), 225 (a4-6) |
| Rated current of the winding for own needs (OVP), A | 500 |
| Total transformer losses, kW | 45 |
| Transformer efficiency, %, not less | 98,5 |
| Weight of the transformer in ready condition, kg | 8250 |
Dimensions
Download PDF (ОНДЦЕ-4350/25-У2-02)
Detailed information on other transformers of this type is available in the technical catalogs below.
Advantages of using ONDCE transformers
- High reliability: Resistant to vibrations, shocks and extreme temperatures.
- Energy efficiency: High efficiency reduces energy consumption and operating costs.
- Multi-functionality: Can be used in various power supply systems and for various types of electric locomotives.
- Ease of maintenance: Easy accessibility of main components simplifies maintenance.
- Durability: The use of high-quality materials ensures a long service life.
Areas of application
ONDCE transformers have a wide range of applications, covering various sectors of railway and industrial transport:
- Railway transport: Used to power traction motors of electric locomotives and electric trains of alternating current, in energy recovery systems and excitation of traction motors. They ensure reliable operation on main railways and suburban lines.
- Industrial transport: Effectively work as part of industrial traction units and freight locomotives used in the mining, metallurgical and chemical industries.
- Metro: Used to power traction systems of metros, where compactness, high reliability and resistance to aggressive environments are important.
- Mining industry: Used to power electric locomotives in mines and quarries, where increased resistance to dust and mechanical influences is required.
Compliance with standards
ONDCE transformers comply with international and national safety and quality standards, which guarantees their effective operation in various operating conditions. They are manufactured in accordance with the requirements of:
- IEC 60076: Requirements for power transformers.
- ISO 9001: Quality management system standards.
- GOST 15150: Requirements for climatic performance of equipment.
This confirms their high quality, reliability and durability, which makes them the optimal choice for modern power supply systems.
For more detailed information and advice on the selection of ONDCE transformers, please contact the official representative of Ukrelectroaparat LLC.