Description
The REO NTT 400 auxiliary power transformer is designed for auxiliary power supplies that are fed by the auxiliary 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 auxiliary power supply. A corresponding sine filter must be connected between the transformer and the inverter. The secondary-side load of the isolating 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 grids (in inverter mode) in containers.
This ensures that REO transformers are optimally aligned to your application. The focus of our development is on maximum service life, cost/benefit optimization and safety.
Customer-specific complete solutions
Auxiliary power transformers can be designed to customer specifications. 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.
Benefits
- Vibration and shock tested according to
- DIN 61373 Cat 1 Class B
- High efficiency
- Low no-load losses
- Reduced stray field
- Low noise
- Weight-optimized
- High mechanical strength
- Installation 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 data
- Power: 1-30kVA
Nominal voltage:
Primary:
- Nominal voltage: (Normal operation): 3×440 Veff 60 Hz
- Nominal voltage: (External supply): 3×400 Veff 50 Hz
- Nominal voltage: (reduced operation): 3×345 Veff 47 Hz
Secondary:
- Voltage: 3×230 Veff
- Operating temp.: -25°C … +55°C (optional +75°C)
- Cooling: AN / AF
- Protection class: IP00
- Pollution degree: PD3
- 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
| Type | Power [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 |
