5
Electrical Installation
Electrical Installation
Electrical Installation
Electrical Installation
07-02-12-02-EN-V1215.doc / Type:
638
53
Type
638A-1A
638A-2A
638A-4A
638A-6A
constant k
1,4
1,22
1,22
1,2
Type
638B-03
638B-05
638B-08
638B-10
638B-15
constant k
1,29
1,13
1,13
1,11
1,08
When information about load torque, Inertia and the friction-situation be there, the effective
momentum is calculated with following formula:
(in case of correct motor dimensioning also the rated torque of the employed motor can be used):
[ ]
[
]
[ ]
s
t
Nm
M
s
T
Nm
M
i
i
i
cycle
eff
×
×
=
∑
2
1
]
[
For the determination of n
average
there must be corresponding information about the positioning-
cycle.
[
]
[ ]
[
]
[ ]
s
t
n
s
T
n
i
i
i
cycle
average
×
−
×
=
−
∑
1
min
1
1
min
The cross section of the power main cable and the rated current of the used fuse are chosen in
accordance with table "Current-carrying capacity of PVC isolated three-phase cable or single
conductors" so, that the permissible current-carrying capacity of the chosen cross section larger or
alike to the calculated main current. With drive groups this is the sum of the main currents.
I
current-carrying capacity
≥
I
main
I
current-carrying capacity
≥
∑
I
main
The rated current of the fuse must be equal to or less than the permissible current-carrying
capacity of the chosen cross sectional cable.
I
R
≤
I
current-carrying capacity
I
R
≤
∑
I
current-carrying capacity
The following table show the maximum current load of PVC insulated three-phase cables (or
conducting wires) according to IEC60204-1 at 40°C environmental temperature and 70°C
maximum conductor temperature.
Line cross section
Individual wires
in insulating
conduit or cable
duct
B1
Cable in
insulating
conduit or cable
duct
B2
Cable on walls
C
Cable in a
cable tray
E
[mm2]
[Aeff]
[Aeff]
[Aeff]
[Aeff]
0,75
7,6
1,0
10,4
9,6
11,7
11,5
1,5
13,5
12,2
15,2
16,1
2,5
18,3
16,5
21
22
4,0
25
23
28
30
6,0
32
40
36
37
10
44
40
50
52
16
60
53
66
70
When determinating the cross section for he power mains, make sure that the cross section
selected is within the range that can be used with power mains terminal X60. See Assignments
Power Connections.
–
Dimensioning the Line Contactor
The rated current of the line conductor is oriented to the over-current for the power mains
connection.
The line contactor is set up so that nominal operating current specified by the manufacturer of the
line contactor for catergory AC-1 is approximately 1.3 times the rated current of the over current
protection.
This manual was downloaded on www.sdsdrives.com
+44 (0)117 938 1800 - [email protected]
