Rockwell Automation 1336R REGEN LINE REG - Manual (Page 8)

1–2 Line Regeneration Package Overview
How to Choose a Mode of
Operation Several characteristics influence the choice of an operating mode
for a given application. The 1336REGEN Line Regeneration
Package can be used with any 380-480 volt drive in the 1336
family. The desired performance of the combined AC drive/Line
Regeneration Package will dictate which mode of operation is best
for an application. The choice of operating mode also affects the
cost of implementation, since hardware requirements are different
for the two modes of operation. The following discussion
describes these two modes in detail and points the user to the best
operating mode for several common applications.
The Regenerative DC Bus Supply Mode
In the Regenerative DC Bus Supply Mode, the 1336 REGEN Line
Regeneration Package supplies both motoring and regenerative
current to one or more common bus drives.
Important: A common bus drive is not a standard AC-input AC
drive. Throughout this manual a “common bus drive”
is defined as a 1336 family AC drive designed to be
powered by a DC power source connected to a
common DC bus.
When the net power requirement of the attached common bus
drives demand motoring power, energy flows from the utility to
the common DC bus.
When the net power requirement of the attached common bus
drives demand regenerative power, energy flows from the common
DC bus to the utility.
1. Precharge for all common bus drives on the common DC bus is
accomplished through the 1336 REGEN Line Regeneration
Package. As a result, three-phase AC power is not connected to
the individual drives. Individual common bus drives do have
separate precharge circuits however, to allow them to be
connected to the powered DC bus.
2. Since the 1336 REGEN Line Regeneration Package supplies
both motoring and regenerative current to the drives, the
precharge, converter and line reactor must all be sized to handle
the peak power requirements of the connected common bus
drives in any quadrant of drive operation.
3. In the Regenerative DC Bus Supply Mode, the 1336 REGEN
Converter operates as a PWM converter, creating sinusoidal
input AC line currents under both motoring and regenerating
conditions. Operation in this mode results in the additional
benefit of very low harmonic current distortion that typically
meets IEEE 519-1992 specifications.
Important: Refer to Chapter 2 for 1336 REGEN Regenerative
DC Bus Supply applications including Installation,
Setup and Programming information.