Output Circuit And Motor Protection - Control Techniques Unidrive 1 Series User Manual

Safety Product Mechanical
Information Information Installation
Table 4-1 Input current, fuse and cable size ratings
Typical Maximum
input continuous
Model
current input current
A
UNI1201 2.4
UNI1202 3.5
UNI1203 4.6
UNI1204 6.5
UNI1205 8.6
UNI2201 10.8
UNI2202 14.3
UNI2203 19.8
UNI3201 26
UNI3202 39
UNI3203 53
UNI3204 78
UNI1401 3.0
UNI1402 4.3
UNI1403 5.8
UNI1404 8.2
UNI1405 10
UNI2401 13
UNI2402 17
UNI2403 21
UNI3401 27
UNI3402 32
UNI3403 40
UNI3404 52
UNI3405 66
UNI4401 76
UNI4402 91
UNI4403 123
UNI4404 145
UNI4405 181
UNI5401 280
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
NOTE
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.
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
WARNING
requirement will cause risk of fire.
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
Unidrive User Guide
Issue Number: 9
Electrical Getting
Menu 0
Installation Started
Fuse
Cable size
rating
2
A A
mm
4.0 6.0 1.5
6.0 10 2.5
8.0 10 2.5
10 10 2.5
12.5 16 2.5
13.9 16 2.5
16.9 20 4
27 35 4
28 40 6
43 60 10
56 70 16
84 80 25
4.5 6.0 1.5
5.5 10 2.5
6.8 10 2.5
8.6 10 2.5
12 16 2.5
16 16 2.5
20 20 4
25 35 4
34 40 6
39 50 10
53 60 10
66 70 16
82 80 25
98 100 35
114 125 35
152 160 50
205 200 70
224 250 95
321 450 120
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Running
Optimisation Macros
the motor
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.
The ground loop impedance must conform to the
AWG
requirements of local safety regulations.The drive must be
16
grounded by a connection capable of carrying the
14
prospective fault current until the protective device (fuse,
WARNING
14
etc.) disconnects the AC supply.The ground connections
must be inspected and tested at appropriate intervals.
14
14
4.4.5 Main AC supply contactor
14
The recommended AC supply contactor type for all sizes is AC1.
10
4.5

Output circuit and motor protection

10
8
The output circuit has fast-acting electronic short-circuit protection which
6
limits the fault current to typically no more than five times the rated
4
output current, and interrupts the current in approximately 20µs. No
additional short-circuit protection devices are required.
4
16 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
14
motor.
14
14
14
Pr 0.46 Motor rated current must be set correctly to avoid a
14 risk of fire in the event of motor overload.
10
WARNING
10
There is also provision for the use of a motor thermistor to prevent
8
overheating of the motor, e.g. due to loss of cooling.
6
4.5.1 Cable types and lengths
6
Since capacitance in the motor cable causes loading on the output of the
4
drive, ensure the cable length does not exceed the values given in Table
4
4-2 and Table 4-3.
2
Use 105°C (221°F) (UL 60/75°C temp rise) PVC-insulated cable with
2
copper conductors having a suitable voltage rating, for the following
0
power connections:
2/0
• AC supply to external EMC filter (when used)
• AC supply (or external EMC filter) to drive
3/0
• Drive to motor
4/0
• Drive to braking resistor
Advanced Technical
Diagnostics
Parameters Data
UL Listing
Information
41