GE AKR User Manual

MicroVersaTrip
®
RMS
-
9
Devices
the
protection
programmer
.
The
low
energy
signal
from
the
programmer
counteracts
the
strength
of
a
permanent
magnet
in
the
flux
-
shifter
,
al
-
lowing
a
spring
to
unseal
the
magnet
and
trip
the
breaker
.
that
cause
non
-
sinusoidal
currents
.
Therefore
,
the
solid
state
microprocessor
is
not
af
-
fected
by
component
toler
-
ance
and
does
not
require
compensation
for
signal
dis
-
tortion
.
Since
the
design
is
based
on
complimentary
metal
oxide
(
CMOS
)
tech
-
nology
,
it
is
less
sensitive
to
extraneous
noise
produced
by
lighting
,
instrumentation
,
radio
,
etc
.
The
solid
state
microproces
-
sor
technology
and
fast
ana
-
log
to
digital
converters
make
it
possible
to
measure
the
magnitude
of
the
phase
current
over
a
number
of
time
periods
within
the
cy
-
cle
.
The
RMS
-
9
sampling
rate
of
27
per
cycle
for
each
phase
allows
for
errors
of
less
than
1
%
on
systems
with
distortions
through
the
13
th
harmonic
.
This
digital
sampling
technique
pro
-
vides
the
most
accurate
system
protection
for
distri
-
bution
systems
that
include
ac
and
dc
variable
speed
drives
,
rectifiers
,
induction
heating
,
and
other
loads
The
RMS
-
9
MicroVersaTrip
system
for
AKR
low
voltage
power
circuit
breakers
con
-
sists
of
four
parts
:
plug
-
in
protection
programmer
,
flux
-
shift
trip
device
,
current
sen
-
sors
and
rating
plugs
.
The
programmer
contains
a
current
sensor
-
powered
,
solid
-
state
logic
unit
and
in
-
corporates
rotary
adjust
-
ment
switches
for
up
to
nine
functions
,
as
well
as
targets
for
mechanical
fault
trip
indi
-
cation
.
MicroVersaTrip
RMS
-
9
represents
the
latest
tech
-
nology
in
digital
solid
-
state
programmers
.
RMS
Digital
Sensing
of
Sinusoidal
and
Non
-
sinusoidal
The
RMS
-
9
provides
accu
-
rate
overload
protection
for
both
sinusoidal
and
non
-
sinusoidal
currents
by
direct
measurement
of
the
true
rms
content
of
the
current
wave
.
This
is
accomplished
by
microprocessor
digital
sampling
techniques
.
A
Full
Function
Trip
Unit
Available
with
Various
Combinations
of
Protection
Features
.
The
RMS
-
9
trip
line
of
pro
-
grammers
provides
maxi
-
mum
breaker
to
breaker
se
-
Current
Sensors
lectivity
and
custom
load
protection
.
Short
-
time
and
Ground
Fault
functions
in
-
clude
the
flexibility
of
coordi
-
nation
with
and
without
an
FT
ramp
.
Type
AKR
power
circuit
breakers
are
avail
-
able
with
High
Range
In
-
stantaneous
,
No
Instanta
-
neous
,
or
Switchable
(
OFF
)
Instantaneous
,
and
Ground
Three
toroidal
current
sen
-
sors
provide
maximum
flex
-
ibility
and
reliability
with
minimum
signal
error
.
Cur
-
rent
sensor
ratios
are
shown
in
Table
30.1
,
page
30
.
Rating
Plugs
Provide
Convenient
Flexibility
in
Matching
Load
Requirements
All
RMS
-
9
programmers
uti
-
lize
a
broad
range
of
field
installable
rating
plugs
for
for
tamper
-
proof
installation
,
future
uprating
capability
,
minimum
size
cable
selec
-
tion
,
and
an
extra
degree
of
coordination
flexibility
.
Fault
.
All
programmers
in
-
clude
a
clear
plastic
cover
with
provisions
for
sealing
Flux
-
shift
Trip
Device
The
flux
-
shifter
is
a
low
en
-
ergy
,
positive
action
tripping
device
that
is
automatically
powered
and
controlled
by
a
m
Fixed
Current
Sensor
Protection
Programmer
Flux
-
Shift
Trip
Device
MicroVersaTrip
®
RMS
-
9
System
Components
12
Courtesy of store.ips.us

GE AKR Specifications

General

Standards	UL489, IEC 60947-2
Voltage Rating	600V
Mounting	Fixed, Drawout
Poles	3
Trip Unit	Electronic
Operating Temperature	+70°C