User Manual of A90 Series Inverter
35
MCCB
Noise
filter
Inverter
Noise
filter
IM
Iron box
Metal tube
Fig. 3-9 Solution to RF Interference
3.2.5.9
Wiring distance between inverter and motor
The longer the wiring distance between the inverter and motor, the higher the carrier
frequency and the higher harmonic leakage current in the cable. This will adversely affect
the inverter and nearby devices. Refer to Table 3 to adjust the carrier frequency and reduce
the high-frequency leakage current.
When the motor wiring distance exceeds 50 m, connect the output terminals (U, V, W) of
the inverter with the dedicated AC reactor (phase capacity: the same as that of the inverter)
for inverter output.
Table 3-2 Wiring Distance and Carrier Frequency between Inverter and Motor
Wiring distance between inverter and
motor
<50m
<100m
>100m
Carrier frequency
Below 10kHz
Below 8kHz
Below 5kHz
Function code F00.23
10.0
8.0
5.0
3.2.6
Cable and screw dimensions of main circuit
The cable and screw dimensions of the main circuit are shown in Table 3-3.
Table 3-3 Cable Dimensions and Terminal Screw Specifications
Frequency
converter
model
Terminal Symbol
Terminal
screw
Tightening
Torque (N.m)
Wire diameter
(mm²
)
Wire type
A90-2T2R8B
PB, +, -, R, S, T, U, V, W
M3
0.5~0.7
1.5
A90-2T4R8B
A90-4T1R5B
A90-4T2R5B
A90-4T4R2B
A90-2T8R0B
M4
1.5~2.0
A90-2T010B
4
A90-4T5R6B
A90-4T9R4B