Introduction

Altivar 980 Regenerative Process Drives are designed for use in two operating modes that can optimize the drive nominal rating according to the system constraints:

• Normal duty (ND): Dedicated mode for applications requiring a slight overload (up to 120%) with a motor power no higher than the drive nominal power

• Heavy duty (HD): Dedicated mode for applications requiring a significant overload (up to 150%) with a motor power no higher than the drive nominal power derated by one rating.

Normal Duty (Left) and Heavy Duty (Right) Modes

This instruction bulletin contains specifications, installation, operation, and maintenance information for the Altivar 980 (ATV980) Regenerative Process Drives. Since the process drive is engineered to order, your equipment may not have the same features, functions, or characteristics described in this document. For information specific to your process drive, consult the additional documentation shipped with it.

The following document is also available from the Technical Library at www.se.com:

• NHA60269, Drives Systems Installation and Maintenance

NHA60269 contains important information on installation, operation, service, and maintenance of this product. Read NHA60269 before performing any work on or with this product.

To replace documents, download them from the Technical Library at www.se.com or contact your local Schneider Electric field office.

The following terminology is used in this instruction bulletin:

• Enclosed drive or process drive refers to the combination of the drive, enclosure, and the power and control circuits that constitute the Altivar 980 Regenerative Process Drives.

• Bypass, or integral bypass starter, refers to the optional, integrated full-voltage combination starter in the process drive. When provided, the integral bypass starter may be used to start and run the motor in the unlikely event that the drive becomes inoperable.

The Altivar 980 Regenerative Drive System is a packaged, high-performance solution for regenerative applications. This active front end (AFE) drive features a three-level input switching stage which reduces common mode voltage and improves performance and efficiency due to custom designed filtering and the three-level design. As such, it provides reduced motor bearing currents and improves the average motor lifespan.

This regenerative drive is highly efficient four-quadrant technology for speed control in both energy directions.

The basic equipment contains active in-feed modules and filter components as well as frequency inverter modules, semiconductor fuses, a main switch, a dv/dt filter choke from 300 hp (200 kW) for the protection of the motor, and spacious mains and bus bars for connection of power cables.

This new technology reaches a total distortion factor, THD(i), of around 2% and therefore fulfills the requirements according to IEEE 519 of THD(i) < 5% in the case of distorted mains voltage.

This robust, adjustable speed drive system is UL 508A Listed for all ratings, with selectable control and power configurations. It is available in Types 1 and 12, in the following ranges. See Component Locations, Dimensions, and Schematics for frame dimensions.

• Frame 1a: 150–250 hp (110–160 kW) ND and 125–200 hp (90–130 kW) HD

• Frame 2a: 300–500 hp (200–310 kW) ND and 250–400 hp (160–250 kW) HD

• Frame 3a: 600–700 hp (400–500 kW) ND and 500–500 hp (310–400 kW) HD

• Frame 4a: 900 hp (630 kW) ND and hp (500 kW) HD

The three-level input switching stage shares many features with two-level active front ends, but with the addition of some important features. The third level is created by the connection of switches between the mains voltage and midpoint of the DC bus (see Three-Level Input Switching), allowing for a third level of switching:

• 0 V

• One-half of the DC bus voltage and

• Full DC bus voltage.

The result is better command and control of the currents flowing to and from the drive.

Three-Level Input Switching

• Three switches (S1, S2, S3) from each phase to capacitor midpoint

• Three voltage levels available for current shaping

• Four-quadrant operation in modern three-level design

• Significant speed and torque accuracy, with and without encoder feedback

• Total current distortion factor THD(i) ~2%

• Compliant with IEEE 519 even in distorted networks

• Extended motor life due to reduction of isolation stress on factor 2

• Excellent performance for all common motor types

• Enhanced efficiency compared to the classic 2-level AFE design

• Compact dimensions due to optimized filter components

Altivar 980 Regenerative Process Drive, 150–900 hp, Available in Types 1 and 12