ABB PSTX Series, Installation And Commissioning Manual

Page: 75 / 188

1SFC132081M0201 | Installation and commissioning manual | Functions 75
Start ramp
In Start ramp state the Softstarter runs one of the start
functions to soft start a motor by controlling the output
voltage or torque. The Start ramp ends and goes into Top
of ramp state when the output voltage comes at 100%
voltage.
Available start functions are:
• Voltage start ramp
• Torque start ramp
• Full voltage start ramp
Top of ramp
When the motor comes at Top of ramp, (100% nominal
speed) the Softstarter closes the bypass and does not
control the motor. In Top of ramp state the Softstarter
only runs diagnostics.
Stop ramp
In Stop ramp state the Softstarter runs stop functions
to soft stop a motor by controlling the output voltage or
torque. The stop ramp state ends and goes into stand by
state when the output voltage comes at the pre-set Stop
ramp end level.
Available stop functions are:
• No ramp
• Voltage stop ramp
• Torque stop ramp
• Dynamic brake
7.1.3 Motor Current Ie
Set the motor current when you install the Softstarter.
This is the rated nominal current of the motor.
WARNING
All PSTX Softstarters must be set to the rated
current of the motor.
Configuration of the Motor Current Ie with these
parameters:
Parameter Description Setting range Default value
01.01 Motor Current Ie Set the nominal current of the motor. For good performance it
is important that it is set to the correct value. For Inside Delta
connection, set this parameter to 58% of the nominal motor
current.
Individual (type
related)
30 A...1250 A,
divided into 19
overlapping ranges
7