Description
The REO on-board power transformer NTT 400 is designed for on-board power supplies that are fed by the on-board power converter (BNU). It 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.
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.
Advantages
- Vibration and shock tested according to
- DIN 61373 Cat 1 Class B
- High efficiency
- Low idling losses
- Reduced field scattering
- Low noise
- Reduced weight
- High mechanical resistance
- Mounting in the exhaust duct of the power converter
- Integration into an existing cooling system
- Pollution degree PD3
- Shield winding possible
- Alternative switching groups
- Temperature monitoring
Technical specification
- Power. 1 – 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)
- Cooling: AN / AF
- Protection rating: IP00
- Pollution: PD 3
- 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
| Type | Performance [kVA] | Total weight [kg] | Copper weight [kg] | Efficiency [%] | UK [%]* |
| NTT 400/1.0 | 1.0 | 12 | 4 | 92.6 | 6.7 |
| NTT 400/1.5 | 1.5 | 17 | 5 | 93.9 | 5.4 |
| NTT 400/2.5 | 2.5 | 26 | 7 | 95.0 | 4.5 |
| NTT 400/4.5 | 4.5 | 39 | 13 | 95.5 | 4.1 |
| NTT 400/7.5 | 7.5 | 59 | 22 | 96.1 | 3.8 |
| NTT 400/10.0 | 10.0 | 73 | 25 | 96.4 | 3.4 |
| NTT 400/15.0 | 15.0 | 96 | 29 | 97.1 | 2.6 |
| NTT 400/20.0 | 20.0 | 126 | 36 | 97.4 | 2.3 |
| NTT 400/25.0 | 25.0 | 150 | 51 | 97.5 | 2.5 |
| NTT 400/30.0 | 30.0 | 175 | 57 | 97.8 | 2.1 |
| Type | L [mm] |
B [mm] |
H [mm] |
N1 [mm] |
N2 [mm] |
D [mm] |
| NTT 400/1.0 | 230 | 93 | 198 | 74 | 176 | 9 |
| NTT 400/1.5 | 230 | 117 | 198 | 98 | 176 | 9 |
| NTT 400/2.5 | 265 | 135 | 228 | 105 | 200 | 10 |
| NTT 400/4.5 | 300 | 151 | 260 | 123 | 224 | 10 |
| NTT 400/7.5 | 360 | 173 | 305 | 147 | 264 | 10 |
| NTT 400/10.0 | 420 | 178 | 360 | 148 | 316 | 13 |
| NTT 400/15.0 | 420 | 208 | 360 | 178 | 316 | 13 |
| NTT 400/20.0 | 420 | 238 | 360 | 208 | 316 | 13 |
| NTT 400/25.0 | 480 | 225 | 410 | 189 | 356 | 13 |
| NTT 400/30.0 | 480 | 248 | 410 | 212 | 356 | 13 |
