ABB ZX0 - Handling sulphur hexafluoride (SF6)

16 | Manual ZX0 HB 600 en - Revision 05
− When a raised false floor is used, load-bearing sections of
the floor frame serve as supports for the panel blocks. No
additional foundation frame is necessary.
As a rule, no gas work is required during installation.
We recommend that gas work should only be per-
formed by personnel trained in the handling of SF
6
.
Gas may only be extracted by certified personnel.
See manual HB 605 “Use of SF
6
insulating gas” for details on
handling SF
6
.
2.2 Foundation bars
2.1.4 Handling sulphur hexafluoride
(SF
6
)
?
The slabs of the raised false floor must be fas-
tened to the supporting frame.
− If there is a concrete floor and the switchgear consists of
several panel blocks (with busbar connections), a founda-
tion frame is required. Standard foundation frames sup-
plied by ABB must be embedded in the floor topping.
?
Maintain the following evenness and straightness tol-
erances when installing the foundation frame or a
raised false floor:
− Evenness tolerance: ± 1 mm / m
− Straightness tolerance: Max. 1 mm / m, but max. 2 mm for
the entire length
&
Consult the order documents for the position of the
foundation bars in the switchgear room.
If no standard ABB foundation frames are used, observe the rel-
evant construction and laying drawings for the special frames.
The standard foundation frames are shown in figure 2.2.1.
Fig. 2.2.1: Foundation frames, top view
a) For feeder panels, width 400 mm
b) For metering, sectionalizer and riser panels, width 400 mm
rear side
front side
a)
b)
(400 mm)
(814 mm)
(400 mm)
(814 mm)