Mitsubishi Electric 800 Series Instruction Manual page 7

2.2
Main circuit terminals
 Cable gauge of main circuit terminals and earth (ground) terminals
Use an appropriate cable gauge to suppress the voltage drop to 2% or less.
If the wiring distance is long between the inverter and motor, the voltage drop in the main circuit will cause the motor torque to decrease especially at a low speed.
The following table indicates a selection example for the wiring length of 20 m.
• 600V class (575 V input power supply, 150% overload current rating for 1 minute)
Terminal
Applicable inverter
screw
model
size

FR-A860-00027 to
M4
00090
FR-A860-00170 M4
FR-A860-00320 M5
FR-A860-00450 M6
FR-A860-00680 M8
FR-A860-01080 M8
FR-A860-01440 M10
FR-A860-01670 M10
FR-A860-02430 M10
FR-A860-02890 M12 (M10) 46
FR-A860-03360 M12 (M10) 46
FR-A860-04420 M12 (M10) 46

The cables used should be 75°C copper cables.

The terminal screw size indicates the size of terminal screw for R/L1, S/L2, T/L3, U, V, W, PR, P/+, N/-, P1, P3, and the screw for earthing (grounding), and P/+ for
option connection. A screw for earthing (grounding) of the FR-A860-02890 or higher is indicated in ( ).
The line voltage drop can be calculated by the following formula:
Line voltage drop [V] = wire resistance [mΩ/m]
×
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.
2.3
Control circuit terminal
 Wiring precautions
• It is recommended to use a cable of 0.3 to 0.75 mm
• The wiring length should be 30 m (200 m for terminal FM) at the maximum.
• Use two or more parallel micro-signal contacts or twin contacts to prevent contact faults when using contact inputs since
the control circuit input signals are micro-currents.
• To suppress EMI, use shielded or twisted cables for the control circuit terminals and run them away from the main and
power circuits (including the 200 V relay sequence circuit). For the cables connected to the control circuit terminals,
connect their shields to the common terminal of the connected control circuit terminal. When connecting an external
power supply to terminal PC, however, connect the shield of the power supply cable to the negative side of the external power supply. Do not directly earth
(ground) the shield to the enclosure, etc.
• Always apply a voltage to the fault output terminals (A1, B1, C1, A2, B2, and C2) via a relay coil, lamp, etc.
• Do not connect any terminal SD on the inverter and the 0 V terminal of the external power supply (when the sink logic is selected).
 Wiring method
• Blade terminals commercially available (as of October 2020)
2
Cable gauge (mm )
With insulation
sleeve
0.3 AI 0,34-10TQ
0.5 AI 0,5-10WH
0.75 AI 0,75-10GY
1 AI 1-10RD
1.25, 1.5 AI 1,5-10BK
0.75 (for two wires) AI-TWIN 2×0,75-10GY

A ferrule terminal with an insulation sleeve compatible with the MTW wire which has a thick wire insulation.

Applicable to terminals A1, B1, C1, A2, B2, and C2.
Blade terminal product
2
Cable gauge (mm )
0.3 to 0.75 BT 0.75-11
Crimp terminal
Tightening
torque
R/L1,
P/+,
N•m
S/L2, U, V, W
P1
T/L3
1.5 2-4 2-4 2-4
1.5 3.5-4 2-4 3.5-4
2.5 5.5-5 5.5-5 8-5
4.4 14-6 14-6 14-6
7.8 22-8 22-8 22-8
7.8 38-8 38-8 38-8
26.5 60-10 60-10 60-10
26.5 60-10 60-10 60-10
26.5 60-10 60-10 60-10
80-12 80-12 80-12
100-12 100-12 125-12
125-12 125-12 150-12
wiring distance [m]
×
2
for connection to the control circuit terminals.
Ferrule terminal model
Without insulation
sleeve
―
―
A 0,75-10
A 1-10
A 1,5-10
―
Insulation cap
number product number
VC 0.75
HIV cables, etc. (mm
Earthing R/L1,
P/+,
(grounding) S/L2, U, V, W
P1
cable T/L3
2-4 2 2 2
3.5-4 3.5 2 3.5
5.5-5 5.5 5.5 8
14-6 14 14 14
22-8 22 22 22
22-8 38 38 38
38-10 60 60 60
38-10 60 60 60
38-10 60 60 60
38-10 80 80 80
38-10 100 100 125
60-10 125 125 150
current [A] / 1000
×
Manufacturer
For UL wire

―
AI 0,5-10WH-GB
AI 0,75-10GY-GB
Phoenix Contact Co., Ltd.
AI 1-10RD/1000GB

AI 1,5-10BK/1000GB
―
Manufacturer
NICHIFU Co., Ltd.
Main circuit terminals
Cable gauge

2
AWG/MCM
)
Earthing R/L1,
P/+,
(grounding) S/L2, U, V, W
P1
cable T/L3
2 14 14 14
3.5 12 14 10
5.5 10 10 8
14 6 6 4
22 4 4 2
22 2 2 1/0
38 2 2 1/0
38 1/0 1/0 2/0
38 2/0 2/0 3/0
38 4/0 250 300
38 250 300 22/0
60 22/0 23/0 24/0
Micro signal contacts
Crimping tool
name
CRIMPFOX 6
Crimping tool
product number
NH 69
WIRING
Earthing
(grounding)
cable
14
12
10
6
4
4
1
1
1
1
1
1/0
Twin contacts
7