Mitsubishi Electric FR-F800 Series Instruction Manual page 58

*2 For all the 200 V class capacities and FR-F840-00930(45K) or lower, it is the gauge of a cable with the continuous maximum permissible
temperature of 75°C (THHW cable). It is assumed that the cables will be used in a surrounding air temperatures of 40°C or less and the wiring
distance of 20 m or shorter.
For the FR-F840-01160(55K) or higher, it is the gauge of a cable with the continuous maximum permissible temperature of 90°C (THHN cable).
It is assumed that the cables will be used in a surrounding air temperatures of 40°C or less and housed in an enclosure.
(For the use in the United States or Canada, refer to "Instructions for UL and cUL" in the Instruction Manual (Startup) or Instruction Manual
(Hardware).)
*3 For the FR-F820-00930(22K) or lower and the FR-F840-00930(45K) or lower, it is the gauge of a cable with the continuous maximum permissible
temperature of 70°C (PVC cable). It is assumed that the cables will be used in a surrounding air temperatures of 40°C or less and the wiring
distance of 20 m or shorter.
For the FR-F820-01250(30K) or higher and the FR-F840-01160(55K) or higher, it is the gauge of a cable with the continuous maximum
permissible temperature of 90°C (XLPE cable). It is assumed that the cables will be used in a surrounding air temperatures of 40°C or less and
housed in an enclosure.
(Selection example mainly for use in Europe.)
*4 The screw size for terminals R/L1, S/L2, T/L3, U, V, W, P/+, N/-, and P1, and the earthing (grounding) terminal are shown.
The screw size for earthing (grounding) terminal on FR-F820-00930(22K) or higher is shown in parentheses.
The screw size for terminal P/+ for option connection on the FR-F840-03250(132K) and FR-F840-03610(160K) is shown in parentheses.
The screw size for earthing (grounding) terminal on FR-F840-04320(185K) or higher is shown in parentheses.
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 the voltage drop (torque reduction) in the low speed range
needs to be reduced.
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.
Pr.72 setting
(carrier frequency)
2 (2 kHz) or lower
3 (3 kHz) or higher
Total wiring length (FR-F820-00105(2.2K) or higher, FR-F840-00052(2.2K) or higher)
When driving a 400 V class motor by the inverter, surge voltages attributable to the wiring constants may occur at the motor
terminals, deteriorating the insulation of the motor. In this case, take one of the following measure.
• Use a "400 V class inverter-driven insulation-enhanced motor" and set Pr.72 PWM frequency selection according to the
wiring length.
Wiring length 50 m or shorter
15 (14.5 kHz) or lower
• For the FR-F840-01160(55K) or lower, connect a surge voltage suppression filter (FR-ASF-H/FR-BMF-H) at the output
side of the inverter. For the FR-F840-01800(75K) or higher, connect a sine wave filter (MT-BSL/BSC) at the output side of
the inverter.
Downloaded from ManualsNet.com
× wire resistance [mΩ/m] × wiring distance [m] × current [A]
FR-F820-00046(0.75K), FR-F820-00077(1.5K),
FR-F840-00023(0.75K) FR-F840-00038(1.5K)
300 m 500 m
200 m 300 m
500 m or less
Wiring length 50 to 100 m
9 (9 kHz) or lower
search engine
1000
FR-F820-00105(2.2K) or higher, FR-
F840-00052(2.2K) or higher
500 m
500 m
300 m
300 m
300 m+300 m=600 m
Wiring length longer than 100 m
4 (4 kHz) or lower
2. INSTALLATION AND WIRING
2.5 Main circuit terminals
1
2
3
4
5
6
7
8
9
10
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