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710-13019-00A
MVS User Manual
Page 29
4H, 4I – Current Imbalance
The MVS can be configured to trip if the currents on the three phases vary from each other by more than a
specified amount. The imbalance is calculated as the difference between the highest and lowest currents on all
three phases, as a percentage of the highest current.
Current imbalance detection is desensitised by 50% during starting and soft stopping.
Parameter 4H
Current Imbalance
Range:
10% - 50%
Default: 30%
Description:
Sets the trip point for current imbalance protection.
Parameter 4I
Current Imbalance Delay
Range:
0:00 - 4:00 (minutes:seconds)
Default: 3 seconds
Description:
Slows the MVS's response to current imbalance, avoiding trips due to momentary fluctuations.
4J, 4K, 4L – Frequency Trip
The MVS monitors mains frequency throughout operation, and can be configured to trip if the frequency varies
beyond a specified tolerance.
Parameter 4J
Frequency Check
Range:
Do Not Check
Start Only
Start/Run (Default)
Run Only
Description:
Determines when and if the starter will monitor for a frequency trip.
Parameter 4K
Frequency Variation
Range:
± 2 Hz
± 5 Hz (Default)
± 10 Hz
± 15 Hz
Description:
Selects the soft starter's tolerance for frequency variation.
Parameter 4L
Frequency Delay
Range:
0:01 - 4:00 (minutes:seconds)
Default: 1 second
Description:
Slows the MVS's response to frequency disturbances, avoiding trips due to momentary
fluctuations.
NOTE
If the mains frequency drops below 35 Hz or rises above 75 Hz, the starter will trip immediately,
irrespective of the settings for Frequency Trip parameters.
4M – Restart Delay
Range:
00:01 - 60:00 (minutes:seconds)
Default: 10 seconds
Description:
The MVS can be configured to force a delay between the end of a stop and the beginning of
the next start. During the restart delay period, the display shows the time remaining before
another start can be attempted.
4N – Motor Temp Check
Range:
Do Not Check (Default)
Check
Description:
Selects whether the MVS will verify the motor has sufficient thermal capacity for a successful
start. The soft starter compares the motor's calculated temperature with the temperature
rise from the last motor start and only operates if the motor is cool enough to start
successfully.
4O, 4P – Ground Fault Level
The MVS can be configured to trip if ground fault exceeds a specified level while the motor is running. Ground
fault is a dynamic trip based on phase current measurements every half-cycle.
Parameter 4O
Ground Fault Level
Range:
1 A - 40 A
Default: 10 A
Description:
Sets the trip point for ground fault protection.
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