Mitsubishi Electric MEsoftstart/I01 Users, Installation & Instruction Manual page 36

Inverter model Lug, Nut and Bolt size
MEsoftstart/I00
MEsoftstart/I01
MEsoftstart/I02
MEsoftstart/I03
MEsoftstart/I04
Earthing stud
The earthing stud on the soft starter should be connected to the cabinet ground or other low-impedance earthing point using
the guidelines shown in Figure 22. The voltage measuring channels of the soft starter require a system earthing to work correctly.
A lack of proper earthing connection may cause the soft starter to behave erratically.
The Earthing wire should be as short as possible (preferably less than 0.5 m). The earthing stud is an M8 bolt on all MEsoftstart
models. Use the same cable cross section as selected for power wiring in Table 11.
Protective guards over the power terminals
After connecting all the AC cables, and before switching on the grid supply power, fit the protective guards supplied with the
soft starter. Pull the side sections slightly apart to slide over the busbar terminal block until the two front lips and lip on each
side clip in position under the terminal block.
36 Wiring
Table 11: Power wiring size and tightening torque specification
Tightening torque
[Nm]
M6 6
M6 6
M8 8
M12 12
M12 12
Figure 22 – Earthing wiring on the soft starter
Cable size
Select the cable size according to the motor maximum
starting current. Refer to local installation standards
for the site.