June 2006
2
For more information visit: www.EatonElectrical.com CA04000006E
SVX9000 Adjustable Frequency Drives
Product Family Overview
Overview
With the SVX9000 series sensorless
vector control, Eaton’s expanded
Cutler-Hammer
®
drive offering now
covers a complete line of PWM
adjustable frequency (speed) drives
in ratings from:
■
208V — 3/4 to 100 hp I
H
;
1 to 100 hp I
L
■
230V — 3/4 to 100 hp I
H
;
1 to 100 hp I
L
■
480V — 1 to 1900 hp I
H
;
1-1/2 to 2200 hp I
L
■
575V — 2 to 2000 hp I
H
;
3 to 2300 hp I
L
The 9000X Family of Drives includes
HVX9000, SVX9000, SLX9000 and
SPX9000 drives. 9000X Series drive
ratings are rated for either high over-
load (I
H
) or low overload (I
L
). I
L
indi-
cates 110% overload capacity for 1
minute out of 10 minutes. I
H
indicates
150% overload capacity for 1 minute
out of 10 minutes.
A full range of enclosure types and
options are available to meet a wide
array of applications — from simple
variable torque to more complex
industrial applications such as convey-
ors, mixers and machine controls.
Application Description
Application Engineering
Proper selection and application of all
drive system components is essential
to assure that an adjustable frequency
drive system will safely and reliably
provide the performance required for
any given application. The party
responsible for the overall design and
operation of the facility must make sure
that qualified personnel are employed
to select all components of the drive
system, including appropriate safety
devices. Eaton’s Cutler-Hammer
AF Drives Application Engineering
Department is prepared to provide
assistance to answer any questions
about the technical capabilities of
Cutler-Hammer drives.
Motor Selection
The basic requirement of motor selec-
tion is to match the torque vs. speed
capability of the motor to the torque
vs. speed requirement of the driven
load.
Motor Torque vs. Speed Capability
As the speed of a motor is reduced
below its 60 Hz base speed, motor
cooling becomes less effective because
of the reduced speed of the self-cooling
fan. This limitation determines the
maximum torque for continuous oper-
ation at any operating speed. The
maximum intermittent operating
torque is determined by the motor’s
torque vs. current characteristics and
the output current capability of the
adjustable frequency controller.
Multiple Motor Operation
A number of motors can be connected
in parallel to a single controller. Since
the frequency of the power supplied
by the controller is the same for each
motor, the motors will always operate
at the same speed. Application Engi-
neering assistance must be requested
for all multiple motor applications to
assure compliance with all controller
design limitations.
Special Types of Motors
Standard NEMA Designs A and B
three-phase motors are the only
motors recommended for use in the
majority of applications, but other
types of motors are occasionally used.
If the existing motor used in the appli-
cation or the motor proposed for use
with the drive
system is a type other
than NEMA Design
A or B, Application
Engineering assistance must be
requested to make certain that the
drive is properly applied.
Controller Selection
The basic requirement of controller
selection is to match the output
current, voltage and frequency cap-
abilities of the controller with the
requirements of the connected motor.
Output Current
The controller must be selected and
applied such that the average operat-
ing motor current and horsepower do
not exceed the continuous current and
horsepower ratings of the controller.
The intermittent operating current
must not exceed the intermittent
current rating of the controller.
Motor Protection
Cutler-Hammer adjustable frequency
drives include electronic motor over-
load protection circuits that are
designed to meet the requirements of
NEC article 430-2 provided that only
one motor is connected to the output
of the controller.
Output Voltage and Frequency
When they are shipped, AF controllers
are adjusted to provide a maximum
output voltage and frequency equivalent
to the input line voltage and frequency.
The controllers can be adjusted to
operate above line frequency, but a
hazard of personal injury or equipment
damage may exist when the motor is
operated above base speed. Before
adjusting the drive to operate above
line frequency, make sure that the motor
and the driven machinery can safely
be operated at the resulting speed.
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