To prevent a malfunction due to noise, route the signal cables 10 cm or more away from the power cables. Also, separate the
main circuit cables at the input side from the main circuit cables at the output side.
After wiring, wire offcuts must not be left in the cabinet. Always keep the soft starter cabinet clean. When drilling mounting
holes in a cabinet etc., take caution not to allow shavings, chips and other foreign matter to enter the soft starter.
Power Terminals – Main circuit
Wiring of the Main circuit of the soft starter and the motor is specified in Table 10 and Table 11 and shown in Figure 21.
3 phase AC power input.
Soft starter power output to
motor and for models
without built-in bypass
Motor-side bypass contactor.
BL1,BL2,BL3 3 phase AC power to bypass
Note that if bypass terminals are not used, they should be covered for safety. The cable sizes and connection lugs for
the Main circuit are specified in Table 11.
Table 10: Power terminals wiring
Terminal function description
Connect these terminals via fuses and MCCB to the three-phase supply
lines. (Refer Figure 7).
Ensure to connect the supply power to the correct terminals as
shown in Figure 21 and Figure 19 or Figure 20
Connect these terminals straight to a three-phase squirrel cage motor. (No
power factor correction capacitors should be fitted between the soft starter
and the motor).
Connect these terminals from the bypass contactor to the soft starter
Connect these terminals to the external bypass contactor. The bypass
contactor should be controlled by the Soft starter Bypass Relay output.
Figure 21 – Power wiring on the soft starter