Advertisement
2.3 Wiring fundamentals
2.3.1 Cable size
Select the recommended cable size to ensure that a voltage drop will be 2 % max.
The following table indicates a selection example for the wiring length of 20 m (when input power supply is 440 V based on
the rated current for 150 % overload for 1 minute).
Converter
Terminal Screw
model
4
Size *
FR-CC2-H
315 kW
M12 (M10)
355 kW
M12 (M10)
400 kW
M12 (M10)
450 kW
M12 (M10)
500 kW
M12 (M10)
560 kW
M12 (M10)
630 kW
M12 (M10)
315 kW
M12 (M10)
355 kW
M12 (M10)
400 kW
M12 (M10)
450 kW
M12 (M10)
500 kW
M12 (M10)
560 kW
M12 (M10)
630 kW
M12 (M10)
*1
The recommended cable size is that of the LMFC cable (heat resistant flexible cross-linked polyethylene insulated cable) with
continuous maximum permissible temperature of 90 °C. Assumes that the surrounding air temperature is 50 °C or less and wiring is
performed in an enclosure.
*2
The recommended cable size is that of THHN cable with continuous maximum permissible temperature of 90 °C. Assumes that the
surrounding air temperature is 40 °C or less and wiring is performed in an enclosure.
(Selection example for use mainly in the United States.)
*3
The recommended cable size is that of XLPE cable with continuous maximum permissible temperature of 90 °C. Assumes that the
surrounding air temperature is 40 °C or less and wiring is performed in an enclosure. (Selection example for use mainly in Europe.)
*4
The terminal screw size indicates the terminal size for R/L1, S/L2, T/L3, P/+, N/–, and a screw for earthing.
The screw size for earthing (grounding) is indicated in brackets.
The line voltage drop can be calculated by the following expression:
√3 × wire resistance [mΩ/m] × wiring distance [m] x current [A]
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.
CAUTION
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 sleeve to wire the power supply and motor.
Crimping
Terminal
Tightening
Torque [Nm]
R/L1,
S/L2, T/L3
S/L2, T/L3
46
150-12
46
C2-200
46
C2-200
46
C2-250
46
C2-200
46
C2-200
46
C2-200
12-pulse rectifier power supply
46
100-12
46
100-12
46
150-12
46
150-12
46
150-12
46
C2-200
46
C2-200
1000
Cable Sizes
2
1
HIV, etc. [mm
] *
Earth
R/L1,
P/+, N/–
Cable
Gauge
2×150
2×150
100
2×200
2×200
100
2×200
2×200
100
2×250
2×250
100
3×200
3×200
2×100
3×200
3×200
2×100
3×200
3×200
2×100
2×100
2×150
100
2×100
2×200
100
2×150
2×200
100
2×150
2×250
100
2×150
3×200
2×100
2×200
3×200
2×100
2×200
3×200
2×100
WIRING
AWG/MCM
PVC, etc. [mm
2
*
Earth
R/L1,
R/L1,
Cable
S/L2, T/L3
S/L2, T/L3
Gauge
2×300
2×150
150
2×350
2×185
2×95
2×400
2×185
2×95
2×500
2×240
2×120
2×500
2×240
2×120
3×350
3×185
2×150
3×400
3×185
2×150
2×3/0
2×95
150
2×3/0
2×95
2×95
2×4/0
2×95
2×95
2×250
2×120
2×120
2×300
2×150
2×120
2×350
2×185
2×150
2×400
2×185
2×150
2
3
] *
11
Advertisement
