Table des Matières
Publicité
Manual BVS 20 ATEX E 103 X / BVS 20 ATEX E 104 X
Terminal
Initial torque
type
[Nm]
UT 2,5
0,6 – 0,8
UT 4
0,6 – 0,8
UT 6
1,5 – 1,8
UT 10
1,5 – 1,8
UT 16
2,5 – 3
UT 35
3,2 – 3,7
Table 1:
Tightening torques and cross sections of
Phoenix Contact type UT terminals
The terminals used for intrinsically safe circuits
do not require certification, but they must always
be specially marked, e.g. with a light blue colour.
The terminals must be arranged so that at least
50 mm clearance (line of sight) exists between
bare parts of the terminals or connected conduc-
tors of the intrinsically safe and non-intrinsically
safe circuits. This clearance is achieved with
separating plates or by using suitable end
clamps for installation. The clearance between
the terminals of the intrinsically safe circuits and
earthed metallic parts must be at least 3 mm,
unless the terminals are themselves used for
earthing. Finally, suitable terminals or separating
plates must be used to ensure a clearance of at
least 6 mm between the terminals of different
intrinsically safe circuits.
In the case of mixed circuitry involving some
intrinsically safe circuits, the terminals for the
non-intrinsically safe circuits must be protected
with covers of insulating material to prevent acci-
dental contact. Only covers provided for this pur-
pose by the terminal manufacturer may be used.
The cover must be provided with a suitable per-
manent warning sign.
Edition February 2021
Copyright
Screw
Clamping range
thread
flexibel
mm
M3
0,14 – 2,5
M3
0,14 – 4
M4
0,2 – 6
M4
0,5 – 10
M5
1,5 – 16
M6
1,5 – 35
thuba Ltd., CH-4002 Basell
Switzerland
9
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Table des Matières
