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Cable Sizes Of The Main Control Circuit Terminals And Earth (ground) Terminals - Mitsubishi Electric FR-HC2-7.5K Instruction Manual

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2.6.3

Cable sizes of the main control circuit terminals and earth (ground) terminals

Select the recommended cable size to ensure that a voltage drop will be 2% max.
If the wiring distance is long between the inverter and motor, a main circuit cable voltage drop will cause the motor
torque to decrease especially at the output of a low frequency.
The following table indicates a selection example for the wiring length of 20m
200V class (when input power supply is 220V)
<Converter (FR-HC2)>
Tightening
Terminal
Model Name
Screw Size

FR-HC2-7.5K
M5
FR-HC2-15K
M6
M8/
FR-HC2-30K
M10(M6)
FR-HC2-55K
M12(M6)
FR-HC2-75K
M12(M10)
24.5 (14.7)
<Outside box (FR-HCB2)>
Tightening
Terminal
Model Name
Screw Size

FR-HCB2-7.5K
M5
FR-HCB2-15K
M5
FR-HCB2-30K
M6
FR-HCB2-55K
M8(M6)
FR-HCB2-75K
M12(M10)
24.5 (14.7)
<Reactor1 (FR-HCL21)>
Tightening
Terminal
Model Name
Screw Size
FR-HCL21-7.5K
M5
FR-HCL21-15K
M6
FR-HCL21-30K
M8
FR-HCL21-55K
M12
FR-HCL21-75K
M12
<Reactor2 (FR-HCL22)>
Tightening
Terminal
Model Name
Screw Size
FR-HCL22-7.5K
M5
FR-HCL22-15K
M6
FR-HCL22-30K
M8
FR-HCL22-55K
M12
FR-HCL22-75K
M12

For the 55K or lower, the cable size is that of the cable (HIV cable (600V class 2 vinyl-insulated cable) etc.) with continuous maximum permissible temperature of
75°C. It assumes that the surrounding air temperature is 50°C or less and the wiring distance is 20m or less.
For the 75K or higher, the recommended cable size is that of the cable (LMFC (heat resistant flexible cross-linked polyethylene insulated cable) etc.) with
continuous maximum permissible temperature of 90°C. It assumes that the surrounding air temperature is 50°C or less and wiring is performed in an enclosure.

The recommended cable size is that of the cable (THHW cable) with continuous maximum permissible temperature of 75°C. It assumes that the surrounding
air temperature is 40°C or less and the wiring distance is 20m or less. (Selection example for use mainly in the United States.)

For the 15K or lower, the recommended cable size is that of the cable (PVC cable) with continuous maximum permissible temperature of 70°C. It assumes
that the surrounding air temperature is 40°C or less and the wiring distance is 20m or less. For the 30K or higher, the recommended cable size is that of the
cable (XLPE cable) with continuous maximum permissible temperature of 90°C. It 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.)

Screw size and tightening torque for earthing (grounding) are indicated in parentheses. (Refer to page 53 for earthing (grounding).)

If a cable thinner than the recommended cable size is used, it may not be protected by the DC fuse. (Refer to page 12 for the fuse selection.)
Crimping
Terminal
Torque
R4/L14,
Nm
S4/L24,
P/+, N/-

T4/L34
2.5
8-5
5.5-5
4.4
22-6
14-6
7.8/14.7
60-8
38-10
(4.4)
24.5 (4.4)
100-12
100-12
100-12
100-12
Crimping
Terminal
Torque
R2/L12, S2/L22,
R2/L12, S2/L22,
T2/L32
Nm
R3/L13, S3/L23,
R3/L13, S3/L23,

T3/L33
2.5
8-5
2.5
22-5
4.4
60-6
7.8 (4.4)
125-8
100-12
Crimping
Terminal
Torque
R/L1, S/L2, T/L3
Nm
R2/L12, S2/L22, T2/L32
2.5
8-5
4.4
22-6
7.8
60-8
24.5
125-12
24.5
100-12
Crimping
Terminal
Torque
R3/L13, S3/L23, T3/L33
Nm
R4/L14, S4/L24, T4/L34
2.5
8-5
4.4
22-6
7.8
60-8
24.5
125-12
24.5
100-12
Main circuit terminal specifications
2
AWG/MCM
HIV, etc.(mm
)

R4/L14,
R4/L14,
Earthing
P/+, N/-
S4/L24,
S4/L24,
cable

T4/L34
T4/L34
8
5.5
5.5
22
14
14
60
38
22
100
100
38
100
100
38
Cable Size
2
AWG/MCM
HIV, etc.(mm
)

R2/L12, S2/L22,
Earthing
T2/L32
R3/L13, S3/L23,
cable
T3/L33
8
5.5
22
14
60
22
125
38
100
38
2
HIV, etc.(mm
)

R/L1, S/L2, T/L3
R/L1, S/L2, T/L3
R2/L12, S2/L22, T2/L32
R2/L12, S2/L22, T2/L32
8
22
60
125
100
2
HIV, etc.(mm
)

R3/L13, S3/L23, T3/L33
R3/L13, S3/L23, T3/L33
R4/L14, S4/L24, T4/L34
R4/L14, S4/L24, T4/L34
8
22
60
125
100
Cable Size
PVC, etc.(mm

R4/L14,
P/+, N/-
P/+, N/-
S4/L24,


T4/L34
8
10
10
6
4
6
25
16
1/0
1
50
50
4/0
4/0
95
95
4/0
4/0
95
95
PVC, etc.(mm

R2/L12, S2/L22,
T2/L32
T2/L32
R3/L13, S3/L23,
T3/L33
T3/L33
8
10
4
25
1/0
50
250
120
4/0
95
Cable Size
AWG/MCM
PVC, etc.(mm

R/L1, S/L2, T/L3
R2/L12, S2/L22, T2/L32
8
10
4
25
1/0
50
250
120
4/0
95
Cable Size
AWG/MCM
PVC, etc.(mm

R3/L13, S3/L23, T3/L33
R4/L14, S4/L24, T4/L34
8
10
4
25
1/0
50
250
120
4/0
95
2
)

Earthing
cable
6
16
25
50
50
2
)

Earthing
cable
6
16
25
35
35
2
)

2
2
)

31

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