Chapter 7 Optional Accessories|CFP2000 Series
7-9
Type KW HP
Rated Amps of
AC Reactor(Arms)
Max. continuous
Amps (Arms)
3%
impedance(mH)
5%
impedance(mH)
Built-in
DC reactor
3% Input AC reactor
Delta part # (Note 2)
Normal
Duty
Light
Duty
Normal
Duty
Light
Duty
Normal
Duty
Light
Duty
Normal
Duty
Light
Duty
Normal Duty Light Duty
055 5.5 7.5
10.5 13 16.8 15.6 2.315 2.025 3.858 3.375 X N/A N/A
075 7.5 10
12 18 19.2 21.6 2.025 1.174 3.375 1.957 X N/A N/A
110 11 15
18 24 28.8 28.8 1.174 0.881 1.957 1.468 X N/A N/A
150 15 20
24 32 38.4 38.4 0.881 0.660 1.468 1.101 X N/A N/A
185 18.5 25
32 38 51.2 45.6 0.660 0.639 1.101 1.066 X N/A N/A
220 22 30
38 45 60.8 54 0.639 0.541 1.066 0.900 X N/A N/A
300 30 40
45 60 72 72 0.541 0.405 0.900 0.675 X N/A N/A
370 37 50
60 73 96 87.6 0.405 0.334 0.675 0.555 X N/A N/A
450 45 60
73 91 116.8 109.2 0.334 0.267 0.555 0.445 O N/A N/A
550 55 75
91 110 145.6 132 0.267 0.221 0.445 0.368 O N/A N/A
750 75 100
110
144 176 172.8 0.221 0.162 0.368 0.27 O
N/A N/A
900 90 125
150 180 240 216 0.162 0.135 0.270 0.225 O N/A N/A
Note 2: AC output reactor is designed with 3% system impedance, it is in planning & design stage now, if you
have any other requirements please contact Delta for detail.
The length of motor cable
1. Cable length suggestion for Drive in full load
If the length is too long, the stray capacitance between cables will increase and may cause leakage
current. It will activate the protection of over current, increase leakage current or not insure the
correction of current display. The worst case is that AC motor drive may damage. If more than one motor
is connected to the AC motor drive, the total wiring length is the sum of the wiring length from AC motor
drive to each motor.
For 460V series AC motor drives, when an overload relay is installed between the drive and the motor to
protect motor from overheating, the connecting cable must be shorter than 50m.
However, the overload relay could still malfunction. To prevent this, install an AC output reactor (optional)
to the drive and/or lower the carrier frequency setting (Pr. 00-17).
2. Effect of Surge voltages for motor and suggestion
When motor is driven by an AC motor drive with PWM control, the motor terminals will experience surge
voltages easily due to power transistors operation of AC motor drive and cable capacitance.
When the motor cable is very long (especially for the 460V series), surge voltages may reduce insulation
quality. To prevent this situation, please follow the rules below:
a. Use a motor with enhanced insulation (Please refer to following charts)
b. Connect an output reactor (optional) to the output terminals of the AC motor drive
c. The length of the cable between AC motor drive and motor should be as short as possible (10 to 20 m
or less)
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