About the Drive
2-1
CHAPTER 2
About the Drive
This chapter describes how to identify the drive using the model number matrix and
shows the major drive components.
The LiquiFlo AC drive is a PWM (pulse-width-modulated) liquid-cooled drive that
provides vector and general purpose regulation for a wide range of applications.
Using vector regulation, the drive can provide high dynamic response, maintain full
rated motor torque to zero speed, and precisely control motor speed in both
directions. The drive can provide this functionality either with encoder feedback (flux
vector control or FVC) or without (sensorless vector control or SVC).
Using general purpose (volts/hertz or V/Hz) regulation, the drive is suited for a broad
range of applications requiring adjustable speed control of motors.
2.1 Identifying the Drive by Model Number
Each LiquiFlo AC drive can be identified by its model number. See figure 2.1. This
number appears on the shipping label and on the drive’s nameplate. The drive’s model
number includes the Power Module and the regulator version. Drive power ratings are
provided in table 2.1.
Figure 2.1 – Identifying the Drive Model Number
NNN AA N N NN
Continuous Ampere Rating (x10)
41 = 414 amps
50 = 500 amps
64 = 643 amps
120 = 1200 amps
LW= water-cooled
LR = refrigerant-cooled
Voltage
2 = 200 to 230 VAC
3 = 270 to 310 VAC
4 = 380 to 480 VAC
Enclosure
0 = Open Chassis
1 = NEMA 1
2 = NEMA 12 Only
4 = NEMA 4x (Indoor Only) or NEMA 12
Regulator Version
60 = Version 6.x Firmware
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