Mitsubishi Electric FR-F820-00077 Instruction Manual page 69

Installation and wiring
For all the 200 V class capacities and FR-F840-01160(55K) or lower, it is the gauge of a cable with
the continuous maximum permissible temperature of 75 °C (HIV cable (600 V grade heat-resistant
PVC insulated wire), etc.). It assumes a surrounding air temperature of 50 °C or lower and the wiring
distance of 20 m or shorter.
For the FR-F840-01800(75K) or higher, it is the gauge of the cable with the continuous maximum
permissible temperature of 90 °C or higher. (LMFC (heat resistant flexible cross-linked polyethylene
insulated cable), etc.). It assumes a surrounding air temperature of 50 °C or lower and in-enclosure
wiring.
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 assumes a surround-
ing air temperature of 40°C or lower 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 assumes a surrounding air temperature of 40 °C
or lower and in-enclosure wiring.
(Selection example for use mainly in the United States.)
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 assumes a
surrounding air temperature of 40 °C or lower 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 assumes a
surrounding air temperature of 40 °C or lower and in-enclosure wiring. (Selection example for use
mainly in Europe.)
The terminal screw size indicates the size of terminal screw for R/L1, S/L2, T/L3, U, V, W, P/+, N/–, P1,
and a screw for earthing (grounding).
The screw size for earthing (grounding) of FR-F820-00930(22K) or higher and FR-F840-04320(185K)
or higher is indicated in parentheses.
A screw size for P/+ terminal for option connection of the FR-F840-03250(132K) and FR-F840-
03610(160K) is indicated 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 it is desired to decrease the volt-
age drop (torque reduction) in the low speed range.
NOTES 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 crimping terminals with insulation sleeves to wire the power supply and motor.
FR-F800
√3 × wire resistance [mΩ/m] × wiring distance [m] x current [A]
1000
Main circuit terminals
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