Motor Control

The S701 device is a Reduced Voltage Soft Start Controller designed to control acceleration and deceleration of 3-phase motors. The S701 provides the user with the ability to adjust initial torque, ramp up and down time and also select Kick Start for high inertial loads.

The S701 line of soft start controllers is specifically designed to be a low cost option for soft starting small (15 hp and down) 3-phase motors. The S701 unit controls current on two of three motor phases to control the torque being applied to the motor, allowing for smooth starting of a motor. The S701 is designed to be used with a Manual Motor Starter or a full voltage starter. These devices provide the necessary overload protection for the motor and also provide line isolation for the motor. Short-circuit protection can be provided by fuses or circuit breakers.

Models are available with an auxiliary contact for controlling a bypass contactor and a brake to control deceleration.

Features

• Rated operational voltage up to 600V AC
• Control voltage range from 24 to 300V AC/DC
• Adjustable ramp times (.5 – 10 seconds)
• Adjustable initial torque control (0 – 85%)
• Kick Start feature n Soft Stop (.5 – 10 seconds)
• Unlimited number of START/STOP operations per hour
• IP20 finger protection
• Fractional to 15 hp motors @ 480V (20 hp @ 600V)

Benefits

• Reduced wear on belts, gears, chains, clutches, shafts and bearings
• Allows for controlling the inrush current to the motor
• Reduced water-hammer in pumping applications
• Less shock to product on conveyor lines and material handling gear

Standards and Certifications

• IEC 947 compliant EN 60947-4-2
• CE marked n CSA Certified
• UL Listed