LSIS SV-IS7 - Cable Length between the Inverter and the Motor

Connecting the Cables
66
Inverter capacity
Terminal
screw size
Screw torque
1)
(Kgf·cm)
Cable
2)
Exterior fuse
mm²
AWG or kcmil
R,S,T
U,V,W
R,S,T
U,V,W
Current
Voltage
220 kW
M12
182.4–215.0
250
250
500
500
800 A
500 V
280 kW
M12
182.4–215.0
325
325
650
650
1000 A
500 V
315 kW
M12
182.4–215.0
2x200
2x200
2x400
2x400
1200 A
500 V
375 kW
M12
182.4–215.0
2x250
2x250
2x500
2x500
1400 A
500 V
1) Apply rated torques to the terminal screws. Loose screws may cause the terminals to short circuit
and malfunction.
2) Only use copper wires with a 600 V, 75℃ rating for the power terminal wiring.
4.7.1 Cable Length between the Inverter and the Motor
The maximum cable lengths of the inverter and the motor are listed in <Table 1) Maximum
cable length by inverter capacity>.
Make sure that the total cable length does not exceed 495 ft (150 m). For inverters with a
capacity of less than 3.7 kW, ensure that the total cable length does not exceed 165 ft (50 m).
Long cable runs can cause reduced motor torque in low frequency applications due to voltage
drop. Long cable runs also increase a circuit’s susceptibility to stray capacitance and may
trigger over-current protection devices, or result in the malfunction of equipment connected to
the inverter.
<Table 1) Maximum Cable Length by Inverter Capacity>
Inverter capacity
Up to 3.7 kW
5.5 kW or more
Maximum cable length
< 164 ft (50 m)
< 492 ft (150 m)
The following table lists maximum carrier frequencies available for model types with a rated
capacity of 5.5 kW or more.
<Table 2) Maximum Carrier Frequency according to Cable Length>
Distance
< 165 ft (50 m)
< 330 ft (100 m)
> 330 ft (100 m)
Allowed Carrier Frequency
<15 kHz
<5 kHz
<2.5 kHz
Depending on the system layout and operating conditions at the installation site, high peak
output voltage may result.