35
2. Installation and Wiring
2.5 Main circuit terminals
1
2
3
4
5
6
7
8
9
10
*1
The cable size is that of the HIV cable (600 V grade heat-resistant PVC insulated wire) etc. with continuous maximum permissible temperature
of 75°C. It assumes a surrounding air temperature of 50°C or lower and the wiring distance of 20 m or shorter.
*2
The cable size is that of the THHW cable with continuous maximum permissible temperature of 75°C. It assumes a surrounding air temperature
of 40°C or lower and the wiring distance of 20 m or shorter.
(For the use in the United States or Canada, refer to "Instructions for UL and cUL" in the document enclosed with the product.)
*3
The screw size for terminals R/L1, S/L2, T/L3, U, V, W, PR, P/+, N/-, and P1, and the earthing (grounding) terminal is shown.
The line voltage drop can be calculated by the following formula:
Line voltage drop [V] =
Use a larger diameter cable when the wiring distance is long or when it is desired to decrease the voltage drop (torque
reduction) in the low speed range.
NOTE
• Tighten the terminal screw to the specified torque.
A screw that has been tightened too loosely can cause a short circuit or malfunction.
A screw that has been tightened too tightly can cause a short circuit or malfunction due to the unit breakage.
• Use crimp terminals with insulation sleeves to wire the power supply and motor.
Total wiring length
With induction motor
Connect one or more general-purpose motors within the total wiring length shown in the following table.
• Use a "600 V class inverter-driven insulation-enhanced motor" and set
Pr.72 PWM frequency selection
according to the
wiring length.
With PM motor
Use the wiring length of 100 m or shorter when connecting a PM motor.
Use one PM motor for one inverter. Multiple PM motors cannot be connected to an inverter.
When the wiring length exceeds 50 m for a 600 V class motor driven by an inverter under PM sensorless vector control, set "9"
(6 kHz) or less in
Pr.72 PWM frequency selection
.
Cable type
Pr.72 setting
(carrier frequency)
Voltage
class
0.75K
1.5K
2.2K
3.7K or
higher
Unshielded
1 (1 kHz) or lower
575 V
500 m
500 m
500 m
500 m
2 (2 kHz) or lower
575 V
300 m
300 m
300 m
500 m
Shielded
1 (1 kHz) or lower
575 V
100 m
100 m
100 m
100 m
2 (2 kHz) or lower
575 V
75 m
75 m
75 m
100 m
Total wiring length (FR-E860-0017(0.75K) or higher)
Wiring length 50 m or
shorter
Wiring length 50 to 100 m
Wiring length longer
than 100 m
14.5 kHz or lower
8 kHz or lower
2 kHz or lower
× wire resistance [mΩ/m] × wiring distance [m] × current [A]
1000
500 m or less
300 m
300 m
300 m + 300 m = 600 m
