881-4027.9 * INSTALLATION AND OPERATING INSTRUCTIONS 8BT2 * Revision 04
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4.3.8. Assembly of the closed relief duct
The duct plates, the connecting bolts, extensions and the ducts leading to the exit (supplied
with the loose delivery) must be mounted on site.
According to exhausting the hot gases from the room, there are two directions for the
construction of pressure relief channel:
Lateral exit
Rear exit
Closed pressure
relief duct
Lateral exit is designed and constructed at the right or left side of the switchgear.
Rear exit is designed and constructed at the back of the switchgear.
ATTENTION!
Risk of injury.
Be aware of the sharp edges of steel parts during the assembly of the pressure relief ducts.
ATTENTION!
Pressure relief ducts have enough weight to endanger people.
Do not stay under a suspended pressure relief duct before completion of assembly.
Preparations
Procedure to be followed if accessibility to the panels is insufficient in the final position:
Mount the pressure relief duct onto corresponding panel before positioning the panel
on the final place of installation.
Position the panel on its final place of installation.
Proceed in the same way with the adjacent panel.
Interconnect both pressure relief duct before positioning the next panel.
NOTE!
For all connections, the bolt type (M8x25) is used.
Hexagon head bolts with set-nuts which are already pressed on steel parts at
the factory.
