Railroad transformer NTT 400 U

The REO transformer NTT 400 D is designed for on-board power supplies, which are fed by the
auxiliary converter. The transformer NTT 400 D is the complete, ready to use-unit with transformer, mounting frame 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 vehicle electrical system. An appropriate sinusoidal filter must be connected between the transformer and the inverter. The secondary-side load of the isolating transformer can be switching devices, rotating machines, resistive loads and semiconductor converter devices. The transformers are designed for the use of vehicles in the AC or DC grid (in inverter mode) in containers.

This guarantees that transformers from REO are optimally designed for your application. Maximum service life, cost/benefit optimization and safety are the focal points of our development work.

• Power. 10 – 30 kVA
• Rated voltage

Primary:

• Rated voltage: (Normal operation): 3×440 Veff 60 Hz
• Rated voltage: (external power supply): 3×400 Veff 50 Hz
• Rated voltage: (reduced operation): 3×345 Veff 47 Hz
  
  

Secondary:

• Voltage: 3×230 Veff
• Operating temperature: -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 acc. to EN61373
• Voltages: 24 / 42 / 110 / 230 / 400 / 690 Volt (Optional)
• Switching group: Optional

Customer-specific components

On-board power transformers can be customized. Are you interested in this product? Please contact us!
In addition to standardized components for use in converters, REO offers customer-specific products – as individual components or as a complete solution in a container. The benchmark in railroad 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.