72 Basic operation – Pro models
Parameters
Description - with options or range
Pedestal RampUp %
Pedestal:
In this mode, the firing angle starts with a step jump to a defined level. It remains at this pedestal level
until it intersects with the slope of a Ramp-up Start Type. At that time, it continues linearly until it
reaches the maximum value.
This parameter
determines the voltage amplitude of the pedestal voltage as a percentage of the
nominal voltage
. The parameter is selectable between [5% - 80%].
Pedestal RampDown %
In this mode, the firing angle drops immediately to a predefined pedestal level. It remains at this
pedestal level until it intersects with the slope of a Normal Ramp down of the ramp down stop type.
At that time, it continues linearly down until it reaches the zero value.
This parameter
determines the voltage amplitude of the pedestal voltage as a percentage of the
nominal voltage
. The parameter is selectable between [5% - 60%].
MSC %
This parameter is entered as a
percentage of Max Full Load
Current (MFLC) for the selected
motor.
The Maximum Starting Current (MSC) as a percentage of the Motor Full Load Current (MFLC).
Read the label on the load. The maximum starting current should be selected to match the
power requirement of the load (and not just selecting the maximum that the motor can
handle e.g. a 15kW water pump that is powered by a 30kW motor).
MULC %
Motor Under Load Current (MULC) is specified as a percentage of MFLC. This parameter can be set
between [0% - 100%] and is typically used to cause a trip when e.g. a pump is running dry and the load
is subsequently drastically reduced.
MOLC %
Motor Over Load Current (MOLC) is specified as a percentage of MFLC. The parameter is adjustable
between 100% and 600% or up to the maximum Frame size capacity which is measured as a
percentage of Max Full Load Current (MFLC) for the selected motor as shown above e.g. :
For a 45kW motor on a MEsoftstart/I01, normal connection, no bypass contactor, the MOLC
parameter range will be [100% - 589%].
For a 110kW motor on a MEsoftstart/I01 the MOLC parameter will be fixed at [100%-241%].
Maximum Starts/Hour
This parameter will limit the starts per hour to protect the motor and the soft starter.
Note: The number of starts per hour is limited to 10 if Normal duty is selected.
Ramp Start Angle %
This parameter sets the voltage level at which the ramp will begin (to bypass the start-up dead band).
The value can be set between [0 – 35%].
Note that this parameter is not applicable when Pedestal Start type is selected. If Kickstart-start type
is selected, this parameter is applicable immediately after kickstart is completed.
Alpha Skip Start %
Alpha Skip Stop %
These parameters allow the user to configure the soft starter to, during ramping, skip over an area
where the motor displays mechanical resonance (oscillation or vibration) This may be needed in a
small or no-load start-scenario.
The two parameters together define a band between [36% - 100%] where the voltage will jump.
Note:
i.
‘Skip stop’ must at all times be greater than ‘Skip start’. The soft starter configuration menu
will enforce this.
ii.
‘Skip start and Skip stop may not be further apart than 15%. Thus the maximum skip-jump
will be 15%. The soft starter configuration menu will enforce this
.
iii.
If the ‘Skip start’ parameter is equal to the ‘Skip Stop’ parameter, no voltage jump is
implemented
.
Summary of Contents for MEsoftstart/I00
Page 15: ...15 Introduction Figure 3 Soft starter terminal and component identification ...
Page 37: ...37 Wiring Figure 23 Fitting protective guards over terminals ...
Page 77: ...77 Basic operation Pro models Figure 40 Understanding the data display ...
Page 97: ...97 MEsoftstart PC Interface Application Figure 60 MEsoftstart PC Application Fault screen ...
Page 119: ......
