GE MicroVersaTrip PM - Page 10

Micro
Versa
Trip
®
Pius
and
Micro
Versa
Trip
®
PM
Trip
Units
Chapter
1
.
Introduction
m
-
High
-
range
(
fixed
)
instantaneous
overcurrent
protection
-
Short
-
time
protection
,
with
or
without
I
2
T
-
Ground
-
fault
protection
,
with
or
without
I
2
T
-
Zone
-
selective
interlock
,
with
ground
fault
only
or
with
both
ground
fault
and
short
time
Additional
optional
functions
available
only
with
JPM
style
trip
units
are
as
follows
.
PM
style
trip
units
require
the
presence
of
external
control
power
.
•
Configurations
-
Communication
and
metering
-
Communication
and
protective
relaying
-
Communication
,
metering
,
and
protective
relaying
•
Metering
and
protective
-
relaying
functions
-
Voltage
-
Energy
(
kWh
/
MWh
)
-
Real
power
(
kW
/
MW
)
-
Total
power
(
kVA
/
MVA
)
-
Frequency
(
Hz
)
-
Protective
relays
(
undervoltage
,
overvoltage
,
voltage
unbalance
,
current
unbalance
,
and
power
reversal
)
0
i
*
VvvS
'
v
>
Figure
2
.
Rear
view
of
MicroVersaTrip
PM
trip
unit
.
1
-
3
Trip
Unit
Functions
1
-
4
Trip
Unit
Catalog
Numbers
MicroVersaTrip
Plus
and
MicroVersaTrip
PM
trip
units
have
specific
standard
and
optional
functions
.
All
trip
units
share
a
series
of
interchangeable
rating
-
plugs
.
The
standard
functions
for
both
types
of
trip
unit
are
as
follows
:
•
Protection
-
Long
-
time
protection
-
Instantaneous
protection
A
simple
catalog
numbering
system
defines
all
of
the
standard
and
optional
trip
unit
functions
.
The
pre
-
fixes
tliat
determine
the
allowable
current
sensor
rat
-
ings
hre
listed
in
Table
1
.
One
of
these
is
present
on
all
trip
unit
catalog
numbers
.
Immediately
following
this
prefix
is
the
letter
L
,
indicating
long
-
time
over
-
current
protection
.
•
Status
-
Trip
target
•
Metering
display
-
Phase
current
(
selectable
among
phases
)
The
optional
functions
available
on
both
types
of
trip
unit
are
as
follows
:
•
Adjustable
protection
-
Switchable
instantaneous
and
ground
-
fault
protection
(
Type
AKR
only
)
Current
Sensor
Ampere
Ratings
Power
Break
Prefix
AKR
200
,
400
,
800
,
1000
,
1600
,
2000
150
,
400
,
600
,
800
,
1600
,
2000
TT
20
2500
,
3000
TT
32
3200
TT
40
4000
4000
Table
1
.
Trip
unit
catalog
number
prefixes
and
corresponding
current
sensor
ratings
.
2
'
A
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