| 摘要 |
The power supply arrangement is designed so that at least one main accumulator (8) is provided as another electrical power source. The capacity of which is greater than that of the emergency current accumulator (9). The control includes a charge condition monitoring unit, which is connected with the main accumulator (8). With the failure to reach a first charge condition minimum value activates a ventilation block, until a second larger charge condition minimum value is exceeded, and which with the failure to reach a third charge condition minimum value, which is lower than the first charge condition minimum value, the changeover unit (14,15) is operated. So that the control and the electrical drives (20,21) are fed from the emergency current accumulator (9).
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