User Manual

Introduction

1-1

HAPTER

Introduction

This manual describes how to use the SP120 demo unit.

For complete product information, refer to the SP120 AC

Drive Installation and Operation Manual (D2-3456).

1.1 What Is a Variable-Speed Drive?

A variable-speed drive is an electronic device that controls

the speed, torque, horsepower, and direction of an AC or DC

motor.

Variable-speed drives offer:

• Improved process control by enabling you to control

virtually any process variable and to control your process

remotely with electrical interfaces.

• Reduced operating costs by enabling you to match the

motor speed to the load requirements.

• Reduced maintenance by providing a “soft-start” capability

that limits inrush current to reduce stress on mechanical

parts.

1.2 About the SP120 Drive

The SP120 drive is best suited for applications with these

requirements:

• A three-phase 1/4 to 5 HP AC induction motor is used

• 115 V, 230 V, or 460 V input is available

• On-board operator controls are desired