Description
22/121 Revision 05 • INSTALLATION AND OPERATING INSTRUCTIONS • 8DJH • 500-8067.9
7.7 Possibilities for pressure relief
In the standard design, the pressure is relieved downwards. In the following panel blocks, the
pressure can optionally be relieved to the rear:
• Panel blocks in wall-standing arrangement
• Panel blocks with an overall height of 1400 mm or 1700 mm
Versions with pressure relief duct and pressure absorber system are also available.
The switchgear room including the cable basement must be able to withstand the pressure
stress caused by an internal arc, and must be equipped with pressure relief openings to the
outside.
Pressure relief without pressure absorber system
7.8 Protection and control equipment
The protection equipment and control equipment is designed customer-specifically. The
devices are installed in the low-voltage compartment or in the low-voltage niche. Details are
given in the respective circuit documentation.
Pressure relief downwards (standard) for
individual panels and panel blocks with
IAC A FL or FLR up to 21 kA/1s
Pressure relief to the rear (option) for panel
blocks with IAC A FL up to 21 kA/1s
1
Total opening, minimum 0.48 m
2
①
Floor opening
③
Expanded metal (supplied by site)
②
Direction of pressure relief
④
Divided floor plate for cable insertion, local installation
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