5 • Te chnical Da ta
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3. TECHNICAL DATA
3.1 Introduction
The RVS-DX is a third generation, highly sophisticated and reliable starter designed for use with
standard three-phase, three-wire, squirrel cage, induction motors.
It provides the best method of reducing current and torque during motor starting.
The RVS-DX starts the motor by supplying a slowly increasing voltage, providing soft start and smooth
acceleration, while drawing the minimum current necessary to start the motor.
The RVS-DX is equipped with internal by-pass controlled by its micro-controller. The by-pass closes
after the end of the starting process, thus reducing heating and saving power.
3.2 Rating and frames sizes
3.3 Starter Selection
The starter should be selected in accordance with the following criteria:
3.3.1 Motor current & Starting Conditions
Select the starter according to motor's Full Load Ampere (FLA) - as indicated on its nameplate (even if
the motor will not be fully loaded).
The RVS-DX is designed to operate under the following maximum conditions:
Max. Starts per Hour: four (4) starts per hour at maximum ratings and up to 10 starts per hour at light
load
applications (consult factory).
Note:
For very frequent starts (inching applications) the inching current should be considered as the Full Load
Current (FLC) (consult factory).
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