Grounding Precautions - Mitsubishi FR - S500 Instruction Manual

Noise reduction examples
FR-BLF
Install filter
FR-BSF01
on inverter's input side.
Inverter
power supply
Install filter FR-BIF
on inverter's input side.
Separate inverter and power
line more than 30cm (3.94inches)
(at least 10cm (11.81inches))
from sensor circuit.
Control
power supply
Do not earth control
box directly.
Do not earth
control cable.
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.5.8 Grounding precautions

Leakage currents flow in the inverter. To prevent an electric shock, the inverter and
motor must be grounded.
Use the dedicated ground terminal to ground the inverter. (Do not use the screw in
the casing, chassis, etc.)
Use a tinned* crimping terminal to connect the earth cable. When tightening the
screw, be careful not to break the threads.
*Plating should not include zinc.
Use the thickest possible ground cable. Use the cable whose size is equal to or
greater than that indicated in the following table, and minimize the cable length.
The grounding point should be as near as possible to the inverter.
Motor Capacity
2.2kW (3HP) or less
3.7kW (5HP)
For use as a product compliant with the Low Voltage Directive, use PVC cable
whose size is indicated within parentheses.
Ground the motor on the inverter side using one cable of the 4-core cable.
Control Reduce carrier
box frequency.
FR-
Inverter
BLF
FR-
BIF
Power
supply
for sensor
Ground Cable Size
200V, 100V class
2 (2.5)
3.5 (4)
19
Install filter
on inverter's output side.
FR-
BLF
Use 4-core cable for motor
power cable and use one
cable as earth cable.
Use twisted pair shielded cable.
Sensor
Do not earth shield but connect
it to signal common cable.
2
(Unit: mm )
400V class
2 (2.5)
2 (4)
FR-BLF
FR-BSF01
IM Motor
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