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CHAPTER 6 - DETAILED PARAMETER DESCRIPTION
115
Range
[Factory Setting]
Parameter
Unit
Description / Notes
The current unbalance values are set as percentage of the motor rated
current (P401).
P614 sets the maximum current difference between the three motor
phases at which the motor can operate without problems, during the
time set at P615. If these values are exceeded, the Soft-Starter is
switched Off and the Current Unbalance error is displayed.
These settings also activate the phase fault protection during the
starting process and during the operation at full voltage.
NOTE!
This function is actuated only after motor start and after full voltage
operation has been reached.
This function, when enabled, ensures protection against undercurrent
before By-pass closing, i. and., preventing By-pass closing in case of
any supply line fault of any thyristor fault.
When this function is disabled, the motor can be started with rated
current lower than 10% of the rated Soft-Starter current.
NOTE!
This function can be disabled only when motors with low currents
are tested.
P616
(1)
0 or 1
Undercurrent before
[ 1=Active ]
Internal By-pass
-
Closing
P614
(1)
0 to 30
Current Imbalance
[ 15 ]
between Phases
1 %In of the motor
P615
(1)
0 to 99
Current Imbalance
[ 0=Inactive ]
between
1s
Phases Times
When this function is enabled it ensures protection against locked
rotor at the end of the start, i. and., it preventing that the By-pass
closes when an overcurrent two times the rated motor current is
detected.
NOTE!
Disable this function only when the motor can withstand loads
with higher currents.
P617
(1)
Motor Overcurrent
Before Internal
By-pass Closing
0 or 1
[ 1=Active ]
-
The function of this parameter is to protect loads that can be run only
in one direction of rotational. When this function is enabled, only the
phase sequence R/1L1, S/3L2, T/5L3 is permitted..
When this function is enabled, the phase sequence is detected every
time the motor is powered-up.
The function is very useful for driving of driving hydraulic pumps which
can be operated only in one direction of rotation.
P620
(1)
0 or 1
RST Phase
[ 0=Inactive ]
Sequence
This function limits the minimum time interval between a new start
after the motor has been switched Off.
P630
2 to 999
Interval of Time
[ 2 ]
after Stop
2s
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