Output Circuit And Motor Protection; Table 4-6 Maximum Motor Cable Lengths (200V Drives); Table 4-7 Maximum Motor Cable Lengths (400V Drives); Table 4-8 Maximum Motor Cable Lengths (575V Drives) - Emerson unidrive sp User Manual

Safety Product Mechanical
Information Information Installation
4.8

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.
Pr 0.46 Motor rated current must be set correctly to avoid a
risk of fire in the event of motor overload.
WARNING
There is also provision for the use of a motor thermistor to prevent over-
heating of the motor, e.g. due to loss of cooling.
4.8.1 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
4-6, Table 4-7 and Table 4-8.
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

Table 4-6 Maximum motor cable lengths (200V drives)

200V Nominal AC supply voltage
Maximum permissible motor cable length for each of
the following frequencies
Model
3kHz 4kHz
SP0201
SP0202
SP0203
SP0204
SP0205
SP1201 65m (210ft)
SP1202 100m (330ft)
SP1203 130m (425ft)
SP1204
SP2201
SP2202
200m 150m
(660ft) (490ft)
SP2203
SP3201
SP3202
SP4201
250m 185m
SP4202
(820ft) (607ft)
SP4203
SP5201
250m 185m
(820ft) (607ft)
SP5202
76
Electrical Getting Basic
installation Started parameters
6kHz 8kHz 12kHz
50m
(165ft)
50m
75m
(165ft)
100m
(245ft)
(330ft)
125m 90m
(410ft) (295ft)
125m 90m
(410ft) (295ft)
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Running SMARTCARD
Optimization
the motor operation

Table 4-7 Maximum motor cable lengths (400V drives)

Maximum permissible motor cable length for each of
Model
3kHz
SP0401
SP0402
SP0403
SP0404
SP0405
SP1401
SP1402
SP1403 130m (425ft)
SP1404
SP1405
SP1406
SP2401
SP2402
200m
(660ft)
SP2403
SP2404
SP3401
SP3402
SP3403
SP4401
SP4402
SP4403
250m
SP5401
(820ft)
SP5402
SP6401
16kHz
SP6402

Table 4-8 Maximum motor cable lengths (575V drives)

Maximum permissible motor cable length for each of
Model
3kHz
SP3501
SP3502
37m
SP3503
(120ft)
200m
SP3504
(660ft)
SP3505
SP3506
SP3507
Onboard Advanced Technical
PLC parameters Data
400V Nominal AC supply voltage
the following frequencies
4kHz 6kHz 8kHz
50m
(165ft)
65m (210ft)
100m (330ft)
75m
100m
(245ft)
150m
(330ft)
(490ft)
90m
(295ft)
185m 125m
(607ft) (410ft)
575V Nominal AC supply voltage
the following frequencies
4kHz 6kHz 8kHz
150m 100m 75m
(490ft) (330ft) (245ft)
Unidrive SP User Guide
UL Listing
Diagnostics
Information
12kHz 16kHz
37m
50m
(120ft)
(165ft)
12kHz 16kHz
Issue Number: 13