74 Digistart D3: User Guide
Issue: G
5G – Reserved
This parameter is reserved for internal use.
5H – Reserved
This parameter is reserved for internal use.
5I – Frequency Check
Options: Do Not Check
Start Only
Start/Run (default)
Run Only
Description: Determines when and if the starter will monitor for a frequency trip.
5J – Frequency Variation
Options: ± 2 Hz
± 5 Hz (default)
± 10 Hz
± 15 Hz
Description: Selects the soft starter's tolerance for frequency variation.
CAUTION
Running a motor outside its specified frequency for long periods can cause damage and premature failure.
5K – Ground Fault Level
Range: 20 mA - 50 A (21 steps) Default: 100mA
Description: Sets the trip point for ground fault protection.
The Digistart D3 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.
NOTE
Ground fault protection is only available if the RTD/PT100 and ground fault protection card is fitted.
5L – Motor Temperature Check
Options: Do Not Check (default)
Check
Description: Selects whether the Digistart D3 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.
8.8.7 Group 6 - Protection Delays
Protection delays slows the Digistart D3's response to the trip condition, avoiding trips due to momentary fluctuations.
6A – Current Imbalance Delay
Range: 0:00 - 4:00 (minutes:seconds) Default: 3 seconds
Description: Slows the Digistart D3's response to current imbalance, avoiding trips due to momentary
fluctuations.
6B – Underpower Delay
Range: 0:00 - 4:00 (minutes:seconds) Default: 5 seconds
Description: Slows the Digistart D3's response to underpower, avoiding trips due to momentary fluctuations.
6C – Overpower Delay
Range: 0:00 - 1:00 (minutes:seconds) Default: 0 seconds
Description: Slows the Digistart D3's response to overpower, avoiding trips due to momentary fluctuations.
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