Siemens 8BT2 Installation And Operating Instructions Manual page 17

Fig5. Natural ventilation for 2500A rated current
Z-detail
In the normal operation
881-4027.9 * INSTALLATION AND OPERATING INSTRUCTIONS 8BT2 * Revision 04
NOTE!
In the rated current 3150A for Sectionalizing and Bus riser panel group, the fan for air
forced ventilation is located in the sectionalizing panel which the circuit breaker is
available. Bus riser panel is naturally ventilated.
Red colored flag
Air flow for natural
ventilation
Fig7. Working condition of the ventilation flap on high voltage compartment door
Fig6. Air forced ventilation for 3150A rated current
After an internal arc fault
Hot gas pressure
due to an internal
arc fault
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