Nidec Digistart D3 User Manual

Digistart D3: User Guide 73
Issue: G
4L – Relay F Action
Options:
Off (default)
Motor overload
Main Contactor
Current imbalance
Run
Underpower
Trip
Overpower
Warning
Frequency
Low Current Flag
Ground fault
High Current Flag
Heatsink overtemperature
Motor Temperature Flag
Phase Loss
Input A trip
Motor thermistor
Input B trip
Changeover Contactor
Description: Selects the function of Relay F (normally open). See Pr 4A Relay A Action for details.
NOTE
Outputs D, E and F are only available if the input/output expansion card is installed.
8.8.6 Group 5 - Protection Settings
These parameters determine when the soft starter's protection mechanisms will activate. The activation point for each
protection mechanism can be set to suit the installation.
The soft starter responds to protection events by tripping, warning, or writing the event to the event log. The response
is determined by the Protection Action settings. The default response is a trip.
CAUTION
The protection settings are vital for safe operation of the soft starter and motor. Defeating the protection
may compromise the installation and should only be done in the case of emergency.
5A, 5B – Excess Start Time
Excess start time is the maximum time the Digistart D3 will attempt to start the motor. If the motor does not transition
to Run mode within the programmed limit, the starter will trip. Set for a period slightly longer than required for a
normal healthy start. A setting of 0 disables excess start time protection.
Range: 0:00 - 4:00 (minutes:seconds) Default: 20 seconds
Description: Parameter 5A sets the time for the primary motor and parameter 5B (Excess Start Time-2) sets the
time for the secondary motor.
5C – Current Imbalance
Range: 10% - 50% Default: 30%
Description: Sets the trip point for current imbalance protection.
The Digistart D3 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.
5D – Phase Sequence
Options: Any Sequence (default)
Positive Only
Negative Only
Description: Selects which phase sequences the soft starter will allow at a start. During its pre-start checks, the
starter examines the sequence of the phases at its input terminals and trips if the actual sequence
does not match the selected option.
5E - Underpower
Range: 0% - 100% Default: 20%
Description: Sets the trip point for underpower protection. Set as required.
5F - Overpower
Range: 80% - 600% FLC Default: 400%
Description: Sets the trip point for overpower protection. Set as required.

Nidec Digistart D3 Specifications

General

Brand	Nidec
Model	Digistart D3
Category	Controller
Language	English