ABB ZX2 - Page 28

28 ZX2 GAS-INSULATED MEDIUM VOLTAGE SWITCHGEAR
Fastening the panels to reinforced foundation
frames
and the baseframe of the panel (Fig. 3.3.2.3 c).
See Fig. 3.3.2.3 a-c for the position and number of
screw connections. The torque for all cheese head
screws below
1
and
2
is 29.5 ft·lb.
Reinforced foundation frames are equipped with
internal threads for fastening the panels. They are
fastened by means of cheese head screws
M 10 x 25 and dished washers, usually using one
shim each positioned between the dished washer
—
Fig. 3.3.2.3 a:
View from above onto
the base plate of the
panel, fastening of the
panel to the reinforced
foundation frame, panel
width 23.6 in (shown:
version with inner cone
termination system)
—
Fig. 3.3.2.3 b:
View from above onto
the base plate of
the panel, fastening
of the panel to the
reinforced foundation
frame, panel widths
31.5 or 33.1 in (shown:
version with inner cone
termination system)
1
Shim
Cheese head screw M 10 x 25, 29.5 ft·lb
Dished washer 8
2
Cheese head screw M 10 x 25, 29.5 ft·lb
Dished washer 8
1
1
1
1
1
1
2
2
1
1
1
1
1
1
1
1
2
2
1
1
—
Fig. 3.3.2.3 a
—
Fig. 3.3.2.3b