Chapter 7 Optional Accessories
MS300
(High Speed Model)
7-17
DC reactor
Delta Part #
Rated Current
(Arms)
Saturation current
(Arms)
DC reactor
(mH)
A
(mm)
B
(mm)
C
(mm)
D
(mm)
E
(mm)
Dimension
(mm)
DR018D0311 18
30.6
3.119
117
127 142
95
106
12*8
DR024D0233 24
41.4
2.338
117
134 143
95
113
12*8
DR032D0175 32
54
1.754
136
131 170
111
108
12*8
DR038D0147 38
64.8
1.477
153
143 186
125
120
12*8
DR045D0124 45
77.4
1.247
153
149 186
125
126
12*8
Length of Motor Cable
1. Leakage current to affect the motor and counter measurement
Due to larger parasitic capacitances in longer motor cables, the leakage current increases.
This can activate the over-current protection and incorrect display of current. In worst case the drive
can be damaged.
If more than one motor is connected to the AC motor drive, the total motor cable length is the sum of
the cable 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. Surge voltage to affect the motor and counter measurement
When a motor is driven by a PWM signal from an AC motor drive, the motor terminals can easily
experience surge voltages (dv/dt) due to the IGBT switching and the cable capacitance. When the
motor cable is very long (especially for the 460V series), surge voltages (dv/dt) may reduce motor
insulation quality. To prevent this situation, please follow the rules below:
a. Use a motor with enhanced insulation
b. Connect an output reactor (optional) to the output terminals of the AC motor drive
c. Reduce the motor cable length to the values below
The suggested motor shielded cable length in the following table complies with IEC 60034-17,
which is suitable for motors with a rated voltage
≤
500 VAC and with an insulation level of
≥
1.35 kV
p-p
230V 1-phase
Model
Rated current
(ND) (Arms)
Without AC reactor
With AC reactor
Shielded Cable
(meter)
Non-shielded
cable (meter)
Shielded Cable
(meter)
Non-shielded
cable (meter)
VFD7A5MS21ANSHA
VFD7A5MS21ENSHA
VFD7A5MS21AFSHA
3.2 50 75 75 115
VFD11AMS21ANSHA
VFD11AMS21ENSHA
VFD11AMS21AFSHA
5 50 75 75 115
Содержание VFD11AMS21AFSHA
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Страница 8: ...Chapter 1 Introduction MS300 High Speed Model 1 3 1 2 Model Name 1 3 Serial Number...
Страница 20: ...Chapter 3 Installation MS300 High Speed Model 3 3...
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Страница 22: ...Chapter 4 Wiring MS300 High Speed Model 4 1 Chapter 4 Wiring 4 1 Wiring 4 2 System Wiring Diagram...
Страница 24: ...Chapter 4 Wiring MS300 High Speed Model 4 3 4 1 Wiring...
Страница 25: ...Chapter 4 Wiring MS300 High Speed Model 4 4 Figure 1...
Страница 27: ...Chapter 4 Wiring MS300 High Speed Model 4 6 4 2 System Wiring Diagram...
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