AC Supply Voltage
200 to 600 Vac
HP Ratings
10 to 1125 HP
(39 to 1250 Amps)
Overview
The DXT Series is a high-end digitally programmable solid state reduced voltage soft starter. This heavy duty starter provides reduced voltage, stepless soft starting of 3-phase AC induction motors, protecting mechanical components from excessive torque stress and electrical systems from the effects
of high motor inrush currents. The DXT Series includes advanced motor and load protection features just like those found in expensive motor protection relays. These include retentive thermal memory, dynamic reset capacity, true thermal modeling, separate trip curves for start and run protection, overload alarm, etc. But in the case of the DXT Series, these features are built in as standard features, providing a cost effective and reliable motor starting and protection scheme for your critical motor applications.
The DXT Series features an easy to use interface operator for programming and status indication. It includes a large tactile feedback keypad, LED status indicators and a 2 line x 20 character backlit display using plain English text readout. In addition to programming the standard parameters such as
starting torque, ramp time, current limit, dual ramp and decel control, other features like programmable overload trip curves (NEMA/UL Classes 5 - 30), starts-per-hour, time between starts and coast down/back spin lockout protection can also be programmed for your specific application needs.
The power of the DXT Series is in the CPU, a microprocessor based protection and control system for the motor and starter assembly. The CPU uses Phase Angle Firing of the SCRs to apply a reduced voltage to the motor, and then slowly and gently increases torque through control of the voltage and current until the motor accelerates to full speed. This starting method lowers the starting current of the motor, reducing electrical stresses on the power system and motor. It also reduces peak starting torque stresses on both the motor and load mechanical components, promoting longer service life and
less downtime.
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