18 ZX2 GAS-INSULATED MEDIUM VOLTAGE SWITCHGEAR
Cleaning the busbar sockets, the contact tubes,
the cable sockets, the sockets for voltage trans-
formers, the test sockets and the outer cones
• Degrease and clean the components with
intensive cleaner M.T.X. 60 forte.
Important note
Assemble the components immediately
to avoid soiling.
3.1.4. Handling sulphur hexafluoride (SF
6
This product contains Sulphur hexafluoride
(SF
6
) (
1
).
As a rule, no gas work is required during
installation.
Hazard warning
We recommend that gas work should only
be performed by personnel trained in the
handling of SF
6
. Gas may only be
extracted by certified personnel. See
manual HB 645 en “Use of SF
6
insulating
gas” for details on handling SF
6
.
switchgear room
When a raised false floor is used, load-bearing
sections of the floor frame serve as supports for
the panels. No additional foundation frame is
necessary.
Hazard warning
The slabs of the raised false floor must
be fastened to the supporting frame.
If there is a concrete floor a foundation frame is
required.
Important note
Maintain the following evenness and
straightness tolerances when installing
the foundation frame or a raised false
floor:
•
100 inch
•
100 inch,
but max. 0.04 inch 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 relevant construction and laying
drawings for the special frames.
3.2.1. Installation of standard foundation
frames
Two versions of standard foundation frames are
available.
Type 1: Foundation frames made of aluminum
profiles which have to be fixed to the concrete
floor. These frames have to be embedded in
screed.
Type 2: Reinforced, earthquake-proof foundation
frames made of steel profiles which have to be
fixed to the concrete floor. These frames do not
have to be embedded in screed.
Both versions are pre-assembled delivered to site.
3.2.1.1. Foundation frames made of aluminum
profiles, type 1
Installation principle:
The foundation frames are bolted together at the
front and rear and three times along the
longitudinal sections. Vertical alignment is
effected by jacking screws. Brackets are used to
fasten the frames to the floor. The foundation
frames are finally embedded in floor topping to
provide their load bearing capacity.
Detailed description of installation
• Position the first foundation frame in the
correct location on the concrete floor.
• Align the foundation frame vertically with the
four screws
1
, taking account of any deviation
in floor level in the direction of the foundation
frames which are still to be laid.
• Fasten the brackets
2
of the foundation frame
to the floor, using one knock-in anchor
5
and
—
Fig.3.1.3.4:
Greasing the silicone
insulating part of
the blanking plug for
voltage transformer
sockets in the area
between the arrows
—
Fig. 3.1.3.4
1. SF
6
is a fluorinated greenhouse gas with a GWP of 22800.
The maximum quantity per panel is 40 lbs, divided into maximally
four gas compartments.
That corresponds to a CO
2
equivalent of 404 tn. l.
Each gas compartment has a gas leakage monitor, and
therefore regular leakage testing (to Fluorinated
Gas Regulation 517/2014) is not required.
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