Traction Transformer NTT 400 U

The REO on-board power supply transformer NTT 400 U is designed for on-board power supply systems that are fed by the on-board power converter (BNU). The NTT 400 U transformer refers to the complete, ready-to-use unit with transformer and housing. The transformer is used to adapt the voltage and for galvanic isolation of the pulse-width modulated DC link voltage and the consumers of the on-board power supply. A corresponding sine filter must be connected between the transformer and the inverter. The secondary-side load of the isolation transformer can be switching devices, rotating machines, ohmic loads and semiconductor power converter devices. The transformers are designed for use in vehicles in AC or DC networks (in inverter operation) in the container.

This guarantees that REO transformers are optimally aligned to your application. The focus of our development is on maximum service life, cost/benefit optimization and safety.

• Power: 10-30 kVA
• Nominal voltage:

Primary:

• Nominal voltage: (Normal operation): 3×440 Vrms 60 Hz
• Nominal voltage: (External supply): 3×400 Vrms 50 Hz
• Nominal voltage: (reduced operation): 3×345 Vrms 47 Hz
  
  

Secondary:

• Voltage: 3×230 Vrms
• Operating temp.: -25°C … +55°C (optional +75°C)
• Humidity: max 95%
• Pollution degree: PD4
• Insulation class: F/H
• Test voltage: EN 50124 / EN 60310
• Vibration resistance: Cat.1 Class A/B according to EN61373
• Voltages: 24 / 42 / 110 / 230 / 400 / 690 Volt (Optional)
• Switching group: Optional

Customer-specific complete solutions

On-board power supply transformers can be designed to be customer-specific. Are you interested in this product? Please contact us!
In addition to standardized components for use in converters, REO offers customer-specific products – as a single component or as a complete solution in a container. The benchmark in railway technology is the availability and safety of passengers. Here, REO offers special solutions that are developed step by step in close cooperation with the customer.