DESCRIPTION
The REO braking resistor D 330 converts excess braking energy into useful heat and is thus ideally suitable for electrical or hybrid drives. The water cooling makes an additional space saving of up to 88% possible as compared to a traditional air-cooled braking resistor. As an extra feature, the resistor can easily be connected with drip-free quick fasteners. Due to a very high performance even in confined spaces the BWD 330 is ideal for the use in wind power technology, too. Harsh environmental conditions, such as salt spray are no problem with the high protection degree up to IP 69K.
As BW (Braking resistor)
When an electric machine operates as a generator (Electromotive brake), the brake resistor protects the machine from a voltage rise in the intermediate circuit. The current reduces als the speed of the machine.
As R (Charging resistor, damping resistor, filter resistance, etc.)
The charging resistor is a current-limiting resistor for charging and discharging capacitors and limits, for example, the inrush current flowing into the DC link capacitor. For this purpose, the device must be designed for a high single pulse energy and nominal voltage. The inductance of the resistor contributes to limit the inrush current – here are wirewound resistors the right choice.
Advantages
- 88% space saving
- Drip-free quick fasteners
- Liquid cooling
- Low weight
- Low surface temperature
| Type | Resistance values [Ohm] |
Continuous output [W] |
max. Operating voltage [V] |
| BW D 330 / 15.000 | 4,2 – 43,5 | 15000 | 800 |
|---|---|---|---|
| BW D 330 / 30.000 | 2,1 – 21,5 | 30000 | |
| BW D 330 / 45.000 | 1,4 – 14,5 | 45000 | |
| BW D 330 / 60.000 | 1,6 – 11 | 60000 |
| Type | L1 [mm] |
L2 [mm] |
B1 [mm] |
B2 [mm] |
D1 [mm] |
D2 [mm] |
H1 [mm] |
| BW D 330 / 15.000 | 390 | 250 | 315 | 285 | 12,5 | G3/4 | 57 |
| BW D 330 / 30.000 | 390 | 250 | 315 | 285 | 12,5 | G3/4 | 87 |
| BW D 330 / 45.000 | 390 | 250 | 315 | 285 | 12,5 | G3/4 | 117 |
| BW D 330 / 60.000 | 390 | 250 | 315 | 285 | 12,5 | G3/4 | 147 |
The resistance values refer to standard products with a standard tolerance of +/- 10 % with an ambient temperature of 20 °C. The resistance value insignificantly changes in function of the winding temperature. Therefore, resistance changes of approx. +10 % in comparison to the cooled-down conditions may occur.
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