7 | Installation
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8DJH • Installation and Operating Instructions • Version 11 • 500-8384.9
Room dimensions
The room dimensions result from the total width of the switchgear and the required wall
distances.
775
≥
800**
≥
200*
≥
50
≥
15
775
890
≥
800**
≥
200*
≥
50
≥
15
Fig. 29:
Pressure relief downwards
(standard)
Fig. 30:
Pressure relief with pressure relief
duct at the rear
*
For lined up switchgear
** Depending on national requirements. For extension or panel replacement, a control aisle of
at least 1000 mm is recommended.
Room height
The minimum room height required results from the height of the switchgear and possible top-
mounted units, such as a low-voltage compartment or wiring duct.
When a pressure absorber system is used, the room heights tested for internal arc classification
according to IEC/EN 62271-200 / VDE 0671-200 are decisive:
Switchgear height [mm]
Room height [mm]
1400
≥ 2000
1700, 1800
≥2200
2300
≥2400
2600
≥2600
7.8 Preparing the foundation
▪ A suitable foundation can be a false floor, a double floor or a reinforced-concrete
foundation. The reinforced-concrete floor must be equipped with foundation rails for
supporting the panels.
▪ As for design and construction of the foundation, the relevant standards DIN 43661
"Fundamentschienen in Innenanlagen der Elektrotechnik" (Foundation rails in electrical
indoor installations) and DIN 18202 "Maßtoleranzen im Hochbau" (Blatt 3) (Measuring
tolerances in structural engineering) apply.
▪ The dimensions of the floor opening and the fixing points of the switchgear frame are given
in the switchgear documentation.
▪ Determine level differences between the installation surfaces of the panels using a
measuring sheet, and compensate with shims.
1
10
8
9
7
6
5
4
3
2
Fig. 31:
Measuring sheet for the foundation
1
Width of complete switchgear
2
750 mm
Stipulations for evenness and straightness
Evenness/straightness tolerance according to DIN 43661:
1 mm for 1 m length, 2 mm over the width of the complete switchgear.
Содержание 8DJH
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