Eaton Cutler Hammer - Reduced Voltage Starters

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Reduced Voltage Starters

IT Family Soft Starters

The IT. Intelligent Technologies line of Reduced Voltage Soft Starters are compact, multi-functional, easy to install, and easy to program. Designed to control acceleration and deceleration of 3-phase motors, the line is available for current ranges from 0.8 amp through 1,000 amp applications and is suitable for mounting in motor control centers or in enclosed control (IP21, IP54 & IP65) applications. The IT. Intelligent Technologies Soft Starters offer integral run bypass, motor overload protection and advanced diagnostics.

DS7 Soft Starters

Eaton’s DS7 line of reduced voltage solid-state soft start controllers is very compact, multi-functional, easy to install, and easy to commission. Designed to control the acceleration and deceleration of three-phase motors, the device is available for current ranges from 4–32A in four frame sizes.

With its small size, it can easily fit in place of existing soft starters, wye-delta starters, or across-the-line NEMA® and IEC starters. This feature allows easy upgrades to existing systems. The product is designed to be wired in the three-phase line feeding the three motor input leads as is done for normal across-the-line starting. The starter uses silicon controlled rectifiers (SCRs) to ramp the voltage to the motor, providing smooth acceleration and deceleration of the load. After the motor is started, the internal run bypass relay closes, resulting in the motor running directly across-theline. Internal run bypass significantly reduces the heat generated as compared to non-bypass starters. The soft stop option allows for a ramp stop time that may be longer than the coast-to-stop time. An external overload protection relay is needed.

Features and Benefits

• Run bypass mode greatly reduces internal heating created by the power dissipation across the SCRs. The bypass relay directly connects the motor to the line and improves system efficiency by reducing internal power losses
• Less heat minimizes enclosure size and cooling requirements, and maximizes the life of all devices in the enclosure
• LED displays device status and provides fault indication
• Variable ramp times and voltage control (torque control) settings provide unlimited starting configurations, allowing for maximum application flexibility
• Soft stop control suits applications where an abrupt stop of the load is not acceptable. Soft acceleration and deceleration reduces wear on belts, gears, chains, clutches, shafts, and bearings
• Minimizes the peak inrush current’s stress on the power system. Peak starting torque can be managed to diminish mechanical system wear and damage.
• 24 Vac/Vdc control voltage enhances personnel and equipment safety. 120/230 Vac control voltage is also available
• Auxiliary relays indicate status of the soft start controllers
  • The TOR relay is activeuntil motor stop command is received and/or the soft start controller detects a fault condition
  • RUN relay is active during the start ramp, bypass, and stop ramp

S801/S811 Soft Starters

The S801/S811 line of Intelligent Technologies Soft Starters is designed to be the smallest, most compact soft starter in the market today. With this small size, it can easily fit in place of existing soft starter designs, wye-delta starters or across-the-line NEMA and IEC starters. This feature allows easy retrofits of existing Motor Control Centers or Enclosures and saves the expense of replacing existing structures or adding a new one to house a soft starter. The product is designed to work with 3-phase motors in a Delta (3-lead) configuration. The S801/S811 works with all motors from fractional horsepower up to motors requiring 1000 amps of steady state current. The built-in over-load (in ranges from 12 - 1000 amps) and run bypass contactor make installation and setup quick and easy. The overload also offers some advanced protective functions to give additional motor protection.

With the pump control option, it is the number one soft starter available for pumping applications. The unique soft stopping control provides a smooth transition for stopping a motor and eliminating the "water-hammer" effect that can damage pipes, valves, and pumps.