S701 Soft Starter Controllers
TL Starting Torque Limiters

S701 Soft Starter Controllers

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

TL Starting Torque Limiters

The TL device line of Starting Torque Limiters is designed for the soft start of 3-phase or single-phase motors, i.e., it allows smoother starting of all AC induction motors, thus decreasing shock and vibration problems encountered during across-the-line starts. The device is ramp-up time/torque adjustable from .5 – 5 seconds/0 – 85% of nominal starting torque.

Application Description
The TL line of torque limiters is designed for single-phase and 3-phase motor applications. It provides a reduction in the peak inrush a motor experiences during start-up. The torque limiter controls current on one of the three motor phases to control the torque being applied to the motor, allowing for smooth starting of a motor. The torque limiter is designed to be used with a Manual Motor Starter or a full voltage starter. These devices provide the necessary over-load protection for the motor and also provide line isolation for the motor. Short-circuit protection can be provided by fuses or circuit breakers.

Features
	Rated operational voltage up to 600V AC
	Adjustable ramp times (.5 – 5 seconds)
	Adjustable initial torque control (0 – 85%)
	Unlimited number of START/STOP operations per hour
	IP20 finger protection
Benefits
	Reduced wear on belts, gears, chains, clutches, shafts and bearings
	Compact design allows easy installation and smaller enclosures
	Less shock to product on conveyor lines and material handling gear