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Rockwell Automation RELIANCE ELECTRIC SP500 - Page 114

Rockwell Automation RELIANCE ELECTRIC SP500
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overcurrent
-
a
current
greater
than
a
specified
maximum
current
value.
overload
capacity
-
the
ability
of
the
drive
to
withstand
currents
beyond
the
system’s
continuous
rating.
It
is
normally
specified
as a
percentage
of
full
load
current
for
a
specified
time
period.
overtemperature
-
a temperature
greater
than
the
specified
(rated)
temperature
limit.
power
factor
-
a
measurement
of
the
time
phase
difference
between
the
voltage
and
current
in
an
AC
circuit.
Power
factor
is
the
ratio
of
Real
Power
(kW)
to
total
KVA
or
the
ratio
of
actual
power
(W)
to
apparent
power
(volt-amperes).
pulse-width
modulation
(PWM)
-
a
method
whereby
a
DC
voltage
is
converted
to
produce
an
AC
voltage
whose
magnitude
and
frequency
can
be
varied.
rated
input
voltage
-
the
specified
AC
line
voltage
connected
to
the
drive.
rated
output
current
-
the
total
maximum
current
delivered
from a
drive
or
to
a
motor
under
full
load
conditions.
rated
output
voltage
-
the
crive’s
total
maximum
output
voltage
while
delivering
rated
current
under
full load
conditions.
rated
output
frequency
-
the
fundamental
output
wave
frequency.
rectifier
-
a
static
power
converter
that
changes
AC
power
to
DC
power.
speed
range
-
the
speed
minimum
and
maximum
at
which
a
motor
must
operate
under
constant
or
variable
torque
load
conditions.
stall
-
a
motor
state
in
which
the
motor
remains
motionless
although
the
motor
is
generating
torque.
surge
suppressor
-
circuit
protection
that
suppresses
the
peak
value
of
any
unusual
input
voltage
to
the
drive.
It
is
sometimes
used
to
lighten
the
leading
edge
of
voltage.
torque
-
a
turning
force
applied
to
a
shaft,
tending
to
cause
rotation.
torque
compensation
-
the
increase
of
the
volts/frequency
ratio
of
the
drive
in
the
low
frequency
area
to
compensate
for
the
reduced
torque
of
the
motor
at
low
speeds.
Reduced
torque
at
low
speeds
is
due
to
the
resistance
of
the
motor
stator
windings.
voltage
feedback
-
a
voltage
signal
which
the
regulator
uses
to
control
the
operation
of
the
drive.
volts
per
hertz (V/Hz)
-
the
ratio
of
output
voltage
(in
volts) to
output
frequency
(in
hertz)
in
the
output
frequency
range
of
the
drive
to
achieve
constant
torque
in
the
motor.
Glossary-2
SP500
AC
Drive
Installation
and
Operation
Manual
Version
3.1

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