GE MicroVersaTrip PM - Chapter 1. Introduction

Micro
Versa
Trip
®
Pius
and
Micro
Versa
Trip
®
PM
Trip
Units
Chapter
1
.
Introduction
Additional
letters
are
appended
to
the
catalog
num
-
ber
to
indicate
installed
protective
functions
,
as
in
Table
2
.
These
suffixes
are
valid
for
both
Plus
and
(
blank
)
-
MicroVersaTrip
Plus
PM
style
trip
units
.
They
are
appended
from
left
to
J
.
5
Rating
Plugs
right
in
the
order
given
.
Interchangeable
rating
plugs
are
used
to
establish
or
change
the
current
rating
of
the
breaker
.
Rating
plugs
for
MicroVersaTrip
Plus
or
MicroVersaTrip
PM
trip
units
in
either
Power
Break
or
Type
AKR
break
-
ers
are
interchangeable
within
the
same
sensor
rat
-
ing
.
Rating
plugs
for
Power
Break
and
Type
AKR
breakers
can
not
be
interchanged
with
Spectra
RMS
MicroVersaTrip
Plus
and
MicroVersaTrip
PM
trip
units
.
A
built
-
in
rejection
feature
prevents
the
insertion
of
a
rating
plug
with
an
incorrect
sensor
rating
into
a
trip
unit
.
Likewise
,
a
Spectra
RMS
rating
plug
can
not
be
inserted
into
a
Power
Break
or
Type
AKR
breaker
.
Rating
plug
catalog
numbers
are
listed
in
Table
4
.
Protective
Function
Suffix
Short
-
time
overcurrent
S
I
Instantaneous
over
cur
rent
Fixed
high
-
range
instantaneous
H
Ground
fault
G
Z
1
or
Zone
-
selective
interlock
:
Z
1
-
ground
fault
only
Z
2
-
ground
fault
and
short
time
High
-
range
instantaneous
(
AKR
-
30
S
only
)
Z
2
K
Switchable
instantaneous
and
ground
fault
(
AKR
only
)
X
Table
2
.
Trip
unit
catalog
number
suffixes
for
optional
functions
.
MicroVersaTrip
PM
catalog
numbers
contain
an
additional
one
-
or
two
-
letter
suffix
to
indicate
the
1
-
6
Equipment
interfaces
-
iV
communication
,
metering
,
and
relaying
functions
MicroVersaTrip
Plus
Trip
Units
installed
,
as
shown
in
Table
3
.
MicroVersaTrip
Plus
catalog
numbers
do
not
have
this
final
suffix
.
MicroVersaTrip
Plus
trip
units
do
not
usually
require
connections
within
the
equipment
,
since
all
wiring
is
contained
within
the
circuit
breaker
.
The
only
two
connections
are
for
optional
zone
-
selective
interlock
(
Z
1
and
Z
2
)
,
made
by
secondary
disconnect
,
and
the
neutral
sensor
,
which
uses
a
special
dedicated
dis
-
connect
.
Zone
-
selective
interlocking
coordinates
breakers
,
so
that
the
downstream
breaker
is
allowed
the
first
opportunity
to
clear
a
disturbance
.
The
two
types
of
zone
-
selective
interlocking
available
are
Zl
,
which
reacts
only
to
ground
faults
,
and
Z
2
,
.
which
reacts
to
both
ground
faults
and
short
-
time
overcurrent
pickups
.
Suffix
Function
MicroVersaTrip
Plus
trip
unit
(
none
)
PM
Metering
,
relaying
,
and
communication
Metering
and
communication
M
Relaying
and
communication
P
Table
3
.
MicroVersaTrip
PM
trip
unit
suffixes
for
communica
-
tion
,
metering
,
and
relaying
.
For
example
,
a
trip
unit
with
catalog
number
TT
32
LSIG
has
the
following
functions
:
TT
32
-
trip
unit
for
sensor
greater
than
2000
and
up
to
3200
amperes
.
L
-
long
-
time
overcurrent
protection
S
-
short
-
time
overcurrent
protection
I
-
standard
instantaneous
protection
G
-
ground
-
fault
protection
v
.
-
v
R
.
*
-
-
V
3
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