Mitsubishi Electric MEsoftstart/I01 Users, Installation & Instruction Manual page 68

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Parameters
Inside Delta Connection
Workload Norm/Heavy
Bypass Contactor
Motor Size kW
Motor Application
Phase Rotation
68 Basic operation – Pro models
Description - with options or range
This parameter defaults to Normal connection. If the Inside Delta option is selected, the soft starter will
allow a wider range of motor sizes (since the current through each phase will be only 58% of the phase
current for normal delta connection.)
Do not select Inside Delta when the motor is wired for a normal 3-wire motor.
This parameter specifies whether the soft starter will be used for a Normal duty or Heavy duty application.
Normal duty is defined as no more than 10 starts per hour (> 6 minutes between starts) and start ramp
shorter than 30s.
Heavy duty is defined as more than 10 starts per hour (<6 minutes between starts) or a start ramp 30s
or longer.
The implication of the load duty selection is described in paragraph 1.1.1.
Default: Absent (for models without built-in bypass; Present for models with built-in bypass)
This parameter specifies to the soft starter that the user installs an external bypass contactor for a
MEsoftstart model that has no bypass contactor installed.
If an internal bypass contactor is present, this parameter will be default 'Present'.
Ensure that this parameter is correct since the soft starter will allow for a higher running current when a
bypass contactor can be switched in after the start-up is completed. Setting this parameter incorrectly can
cause damage to the soft starter and will cause unexpected behaviour such that the motor to coast to a
stop once the start ramp is done, when Bypass is configured for but not present.
The range of motor frame sizes that may be started with the MEsoftstart model soft starter is dependent
on the following parameters:
Supply voltage
Inside Delta or Normal 3-wire connection
Load Duty (Normal or Heavy)
Bypass contactor present or not present
Depending on this configuration, motor sizes may be selected as specified in the tables for each MEsoftstart
model in paragraph 1.1.1.
The TFT display guides the user by presenting only the applicable list of motor sizes and by showing the
typical motor full load current at a power factor of 0.8.
The motor size or rated current can be found in the rating plate of the motor.
Once the motor size is selected, the Max Full Load Current (MFLC) is automatically calculated and displayed.
Check the motor rating plate and ensure that the correct motor size is selected here.
The typical applications for which the soft starter may be used, each has a pre-set factory default
configuration. The supported applications are listed below.
Notes:
i.
The user should select an application profile and then adjust parameters as needed. The selected
configuration will be saved as the User configuration, which will be used to run the soft starter.
ii.
If the user's application is not one of the listed applications, Select 'Pump' and set the parameters as
required for the user's installation.
iii.
The User configuration can also be modified if further adjustments are needed.
Default (select this profile to keep the current configuration)
Fan
Pump
High pressure pump
Compressor
Conveyor Belt
This parameter specifies the required direction of the incoming Grid Phase rotation. This can be set to
[Clockwise, Anti-clockwise, Don't care]
Note: If set to either clockwise or anti-clockwise, then the incoming direction of phase rotation must be
in the selected orientation or the motor will not start and the operator will be allowed to either correct
the wiring or change the direction of rotation.

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