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 for voltage adaptation and galvanic isolation of the pulse-width modulated DC link voltage and the consumers of the on-board power supply. A suitable sine filter must be connected between the Transformer and the inverter. The secondary-side load of the isolation Transformer can include switching devices, rotating machinery, ohmic loads, and semiconductor converter devices. The Transformers are designed for use in vehicles within AC or DC networks (in inverter operation) in containers.

This guarantees that REO Transformers are optimally tailored for your application. Maximum service life, cost/benefit optimization, and safety are the key focus areas in our development.

• Power: 10-30 kVA
• Nominal voltage:

Primary:

• Rated voltage: (Normal operation): 3×440 Veff 60 Hz
• Rated voltage: (External supply): 3×400 Veff 50 Hz
• Rated voltage: (Reduced operation): 3×345 Veff 47 Hz
  
  

Secondary:

• Voltage: 3×230 Veff
• 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

Customized complete solutions

On-board power supply transformers can be custom-designed. Are you interested in this product? Please contact us!
In addition to standardized components for use in converters, REO offers customized 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.