SIGMATEK 074.00660, Power Installation Manual

Page: 88 / 98

88
Sigmatek FDD Sizes 7 to 9 Power Installation Guide
5.1.21 Maximum motor cable 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 5-14.
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 5-14 Maximum motor cable lengths
The cables lengths at 0.667 and 1kHz switching frequency are the same as cable lengths at 2 kHz.
•
Cable lengths in excess of the specified values may be used only when special techniques are
adopted; refer to the supplier of the drive.
• The default switching frequency is 3 kHz for Open-loop and RFC-A and 6 kHz for RFC-S mode.
The maximum cable length is reduced from that shown in Table 5-14 if high capacitance or reduced
diameter motor cables are used, refer to section 4.6.2
High-capacitance / reduced diameter
cables on page 55.
5.1.22 Braking resistor values
Table 5-15 Minimum resistance values and peak power rating for the braking resistor at 40 °C (104 °F)
*Resistor tolerance: ±10 %. The minimum resistance specified are for stand-alone drive systems
only. If the drive is to be used as part of a common DC bus system different values may be required.
Contact the supplier of the drive for more information.
Model
Maximum permissible motor cable length for each of the following switching
frequencies
2
kHz*
3
kHz
4
kHz
6
kHz
8
kHz
12
kHz
16
kHz
All size 7 to
9 models
250 m (820 ft)
187 m
(614 ft)
125 m
(410 ft)
93 m
(305 ft)
62 m
(203 ft)
46 m
(151 ft)
Model
Minimum resistance * Instantaneous power rating Continuous power rating
Ω kW kW
400 V
074.00660 7.5 90.2 30
074.00770 7.5 90.2 37
074.01000 7.5 90.2 45
084.01340 6.3 107.4 55
084.01570 6.3 107.4 75
094.02000 (9A) 3.6 187.8 90
094.02240 (9A) 3.6 187.8 110
094.02000 (9E) 2.6 260 90
094.02240 (9E) 2.6 260 110