Power cabling
vacon • 24
4
4.2.1.1
Cable and fuse sizes, frames MU3 to MU3
The recommended fuse types are gG/gL (IEC 60269-1) or class T (UL & CSA). The fuse voltage
rating should be selected according to the supply network. The final selection should be made
according to local regulations, cable installation conditions and cable specifications. Bigger
fuses than what is recommended below shall not be used.
Check that the fuse operating time is less than 0.4 seconds. Operating time depends on used
fuse type and impedance of the supply circuit. Consult the factory about faster fuses. Vacon of-
fers recommendations also for high speed J (UL & CSA ), aR (UL recognized, IEC 60269-4) and
gS (IEC 60269-4) fuse ranges.
Table 7. Cable and fuse sizes for
VACON
®
20 X, 208-240V (MU2 and MU3).
The cable dimensioning is based on the criteria of the International Standard
IEC60364-5-52
: Cables
must be PVC-isolated; use only cables with concentric copper shield; Max number of parallel cables is 9.
When using cables in parallel,
NOTE HOWEVER
that the requirements of both the cross-sectional area
and the max number of cables must be observed.
For important information on the requirements of the earthing conductor, see chapter Earthing and
earth fault protection of the standard.
For the correction factors for each temperature, see International Standard
IEC60364-5-52
.
Frame
Type
I
INPUT
[A]
Fuse
(gG/gL)
[A]
Mains and
motor cable
Cu [mm
2
]
Terminal cable size
Main
terminal
[mm
2
]
Earth
terminal
[mm
2
]
MU2
0004 2—0007 2 4.3—8.4
10
3*1.5+1.5
0.2 — 2.5
ring terminal
MU3
0011 2
13.4
20
3*2.5+2.5
0.5 — 16.0
ring terminal
0012 2
14.2
20
3*2.5+2.5
0.5 — 16.0
ring terminal
0017 2
20.6
25
3*2.5+2.5
0.5 — 16.0
ring terminal
Frame
Type
I
INPUT
[A]
Fuse
(gG/gL)
[A]
Mains and
motor cable
Cu [mm
2
]
Terminal cable size
Main
terminal
[mm
2
]
Earth
terminal
[mm
2
]
MU2
0003 4—0004 4 3.2—4.0
6
3*1.5+1.5
0.2 — 2.5
ring terminal
0005 4—0006 4 5.6—7.3
10
3*1.5+1.5
0.2 — 2.5
ring terminal
0008 4
9.6
20
3*2.5+2.5
0.2 — 2.5
ring terminal
MU3
0009 4
11.5
20
3*2.5+2.5
0.5 — 16.0
ring terminal
0012 4
14.9
20
3*2.5+2.5
0.5 — 16.0
ring terminal
0016 4
20
25
3*6+6
0.5 — 16.0
ring terminal
Table 8. Cable and fuse sizes for
VACON
®
20 X, 380-480V (MU2 and MU3)
Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: [email protected]
