8 Parameter Descriptions
8.1 Primary Motor Settings
NOTICE
Default settings are marked with *.
The parameters in
Primary Motors Settings
configure the
soft starter to match the connected motor. These
parameters describe the operating characteristics of the
motor and allow the soft starter to model the motor
temperature.
NOTICE
Parameter 1-2 Locked Rotor Time
determines the trip
current for motor overload protection. Its default setting
provides motor overload protection:
•
Class 10.
•
Trip current 105% of FLA, or equivalent.
1-1 Motor FLC
Option:
Function:
Model
dependent
Matches the soft starter to the connected
motor full load current. Set to the full load
current (FLC) rating shown on the motor
nameplate.
NOTICE
The setting for this parameter sets the
basis for calculation of all current-based
protection settings.
1-2 Locked Rotor Time
Range:
Function:
10 s
*
[0:01–2:00
(min:s)]
Sets the maximum length of the time the
motor can sustain locked rotor current from
cold before reaching its maximum
temperature. Set according to the motor
datasheet.
1-3 Start Mode
Option:
Function:
Selects the soft start mode. See
for more details.
Constant current*
Adaptive control
1-4 Current Limit
Range:
Function:
350%
*
[100–
600%
FLC]
Sets the current limit for constant current and
current ramp soft starting as a percentage of
motor full load current. See
for more details.
1-5 Initial Current
Range:
Function:
350%
*
[100–
600%
FLC]
Sets the initial start current level for current
ramp starting as a percentage of motor full load
current. Set so that the motor begins to
accelerate immediately after a start is initiated.
If current ramp starting is not required, set the
initial current equal to the current limit. See
for more details.
1-6 Start Ramp Time
Range:
Function:
10 s
*
[1–
180 s]
Sets the total start time for an adaptive control
start or the ramp time for current ramp
starting (from the initial current to the current
limit). See
for more
details.
1-7 Kick Start Level
Range:
Function:
500%
*
[100–
700% FLC]
Sets the level of the kick-start current.
CAUTION
INCREASED TORQUE LEVEL
Kick-start subjects the mechanical
equipment to increased torque levels.
•
Ensure that the motor, load,
and couplings can handle the
additional torque before
using this feature.
1-8 Kick Start Time
Range:
Function:
0000
ms
*
[0–
2000 ms]
Sets the kick-start duration. A setting of 0
disables kick-start. See
for more details.
CAUTION
INCREASED TORQUE LEVEL
Kick-start subjects the mechanical
equipment to increased torque
levels.
•
Ensure that the motor, load,
and couplings can handle
the additional torque before
using this feature.
Parameter Descriptions
VLT
®
Soft Starter MCD 500
60
Danfoss A/S © 05/2016 All rights reserved.
MG17K602
8
8
