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RVS-DX, Digital Soft Starter Instruction Manual—4/01/04
5-6
Dual Adjustment
The dual adjustment feature allows the RVS-DX to have two sets of starting characteristics. This
feature is very beneficial in applications where the motor may be starting loaded or unloaded. There
is also a dual setting for motor FLA, which allows the RVS-DX to operate a two speed motor with
adequate motor protection.
The RVS-DX is transferred to the dual adjustment settings by connection of control power to
terminal C1, when it is programmed to Dual Adjust. The dual adjustment parameters are:
Slow Speed Torque
The slow speed torque determines the torque while the motor is operating at 1/6 of the nominal
speed. The slow speed torque can be set from 1 to 10.
Maximum Slow Speed Time
The maximum slow speed time sets the allowable operation time that the RVS-DX can run at slow
speed. The setting range is from 1 to 30 seconds.
IV Initial voltage 10-50%
CL Current limit 100-400%
AT Acceleration time 1-30 seconds
DT Deceleration time 0-30 seconds
FLA Motor FLA 8-390 Amps depending upon RVS-DX’s FLC.
WARNING
Operating current while motor is running at 1/6 speed is much higher than nominal current
and motor ventilation is much weaker. Special precaution should be taken to prevent
overheating while running at slow speed for long periods of time.