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A S S E M B L Y O F T H E S W I T C H G E A R O N S I T E
5.9 Pressure relief ducts
•
The pressure relief duct is supplied dismantled
in single components. The rear and front wall
correspond, as far as length is concerned, with
the appropriate panel width
•
The screw fixing material is contained in the
“pressure relief duct” set of bags. Rivet nuts
are already provided in the metal sheets
•
Detailed instructions for gas exhaust duct
assembly are described in document 1VLG100135
and in assembly manual 1VLM000034
Note:
The rear pressure relief flap must be mounted
according to figure 55.
Details regarding connection to the wall and a
discharge grating for pressure relief outside the
switchroom will be agreed on with the customer.
5.9.1 Gas duct with outlet
Once the panels are bolted up, and busbars are
installed, it is possible to start fixing the gas duct
on the top of the switchgear. Every panel has
three fixing points in the front part (Fig. 56) and
three fixing points on the rear part (Fig. 57).
50 Pressure relief duct
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Figure 52 Schematic diagram of the pressure relief duct.
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Figure 53 Fixing points on the front
—
Figure 54 Fixing points on the rear
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Figure 55 Assembly of pressure relieve flaps with or without gas duct
50