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Unidrive User Guide
41
Issue Number: 9 www.controltechniques.com
Table 4-1 Input current, fuse and cable size ratings
The recommended cable sizes above are only a guide. Refer to local
wiring regulations for the correct size of cables. In some cases a larger
cable is required to avoid excessive voltage drop.
N
UL listing is dependent on the use of the correct type of UL-listed fuse,
and applies when symmetrical short-circuit current does not exceed 5kA
for sizes 1 to 3, 10 kA for size 4 or 18kA for size 5.
A fuse or other protection must be included in all live connections to the
AC supply.
An MCB (miniature circuit breaker) or MCCB (moulded case circuit
breaker) with type C tripping characteristics and the same rating as the
fuse(s), may be used in place of the fuse(s), on condition that the fault
current clearing capacity is sufficient for the installation.
4.4.3 Fuse Types
The fuse voltage rating must be suitable for the drive supply voltage.
•
Europe: Type gG HRC industrial fuses to IEC60269 (BS88)
•
USA: Class CC fuses up to 30A, Class J above 30A
4.4.4 Ground connections
The drive must be connected to the system ground of the AC supply.
The ground wiring must conform to local regulations and codes of
practice.
4.4.5 Main AC supply contactor
The recommended AC supply contactor type for all sizes is AC1.
4.5 Output circuit and motor protection
The output circuit has fast-acting electronic short-circuit protection which
limits the fault current to typically no more than five times the rated
output current, and interrupts the current in approximately 20µs. No
additional short-circuit protection devices are required.
The drive provides overload protection for the motor and its cable. For
this to be effective, Pr
0.46
Motor rated current
must be set to suit the
motor.
There is also provision for the use of a motor thermistor to prevent
overheating of the motor, e.g. due to loss of cooling.
4.5.1 Cable types and lengths
Since capacitance in the motor cable causes loading on the output of the
drive, ensure the cable length does not exceed the values given in Table
4-2 and Table 4-3.
Use 105°C (221°F) (UL 60/75°C temp rise) PVC-insulated cable with
copper conductors having a suitable voltage rating, for the following
power connections:
•
AC supply to external EMC filter (when used)
•
AC supply (or external EMC filter) to drive
•
Drive to motor
•
Drive to braking resistor
Model
Typical
input
current
Maximum
continuous
input current
Fuse
rating
Cable size
A
A
A
mm
2
AWG
UNI1201
2.4
4.0
6.0
1.5
16
UNI1202
3.5
6.0
10
2.5
14
UNI1203
4.6
8.0
10
2.5
14
UNI1204
6.5
10
10
2.5
14
UNI1205
8.6
12.5
16
2.5
14
UNI2201
10.8
13.9
16
2.5
14
UNI2202
14.3
16.9
20
4
10
UNI2203
19.8
27
35
4
10
UNI3201
26
28
40
6
8
UNI3202
39
43
60
10
6
UNI3203
53
56
70
16
4
UNI3204
78
84
80
25
4
UNI1401
3.0
4.5
6.0
1.5
16
UNI1402
4.3
5.5
10
2.5
14
UNI1403
5.8
6.8
10
2.5
14
UNI1404
8.2
8.6
10
2.5
14
UNI1405
10
12
16
2.5
14
UNI2401
13
16
16
2.5
14
UNI2402
17
20
20
4
10
UNI2403
21
25
35
4
10
UNI3401
27
34
40
6
8
UNI3402
32
39
50
10
6
UNI3403
40
53
60
10
6
UNI3404
52
66
70
16
4
UNI3405
66
82
80
25
4
UNI4401 76
98
100
35
2
UNI4402
91
114
125
35
2
UNI4403
123
152
160
50
0
UNI4404 145
205
200
70
2/0
UNI4405
181
224
250
95
3/0
UNI5401
280
321
450
120
4/0
Fuses
The AC supply to the drive must be fitted with suitable
protection against overload and short-circuits. Table 4-1
shows recommended fuse ratings. Failure to observe this
requirement will cause risk of fire.
NOTE
WARNING
The ground loop impedance must conform to the
requirements of local safety regulations.The drive must be
grounded by a connection capable of carrying the
prospective fault current until the protective device (fuse,
etc.) disconnects the AC supply.The ground connections
must be inspected and tested at appropriate intervals.
Pr
0.46
Motor rated current
must be set correctly to avoid a
risk of fire in the event of motor overload.
WARNING
WARNING
Содержание Unidrive 1 Series
Страница 208: ......
