MicroVersaTrip Plus™ and MicroVersaTrip PM™ Trip Units
Chapter 1. Introduction
4
C
C
C
Ch
h
h
haa
a
arrrraa
a
accc
ctttteee
errrr
M
M
M
Maa
a
ax
x
x
xiiiim
m
m
mu
u
u
um
m
m
m A
A
A
Allllllllo
o
o
ow
w
w
waa
a
ab
b
b
blllleee
e
C
C
C
CT
T
T
T
2
2000 A
3
2500/3000/3200 A
4
4000 A
5
5000 A
Table 2. Breaker frame size maximum CT referred to by second
character of Trip Unit catalog number.
The third and fourth characters of the catalog
number indicate the CT that is actually installed in
the breaker, as listed in Table 3. The table also indi-
cates whether each CT is available with only RMS9C
Trip Units or with both types.
C
C
C
Ch
h
h
haa
a
arrrraa
a
accc
ctttteee
errrrssss
C
C
C
CT
T
T
T SSS
Siiiizzzzeee
e
T
T
T
Trrrriiiip
p
p
p U
U
U
Un
n
n
niiiitttt SSS
Seee
errrriiiieee
essss
01
150 A
RMS9C
02
200 A
both
03
225 A
RMS9C
04
400 A
both
06
600 A
RMS9C
08
800 A
both
10
1000 A
both
16
1600 A
both
20
2000 A
both
25
2500 A
both
30
3000 A
both
32
3200 A
RMS9C
40
4000 A
both
50
5000 A
RMS9C
Table 3. Installed breaker CT size referred to by third and
fourth characters of Trip Unit catalog number.
The fifth character of the catalog number is the let-
ter L, which indicates that all Trip Units come with
long-time overcurrent protection. Additional letters
are appended to the catalog number to indicate
installed protective functions, as in Table 4. These
suffixes are valid for both MicroVersaTrip Plus and
MicroVersaTrip PM style Trip Units. They are
appended from left to right in the order given.
SS
S
Su
u
u
uffffffffiiiix
x
x
x
P
P
P
Prrrro
o
o
otttteee
eccc
cttttiiiivvvveee
e F
F
F
Fu
u
u
un
n
n
nccc
cttttiiiio
o
o
on
n
n
n
S
Short-time overcurrent protection
I
Instantaneous overcurrent protection
H
Fixed high-range instantaneous
K
Fixed high-range instantaneous (AKR-30S
only)
G
Ground fault
GD
Defeatable ground fault (not UL listed)
Z1 or
Z2
Zone-selective interlock:
Z1 – ground fault only
Z2 -– ground fault and short time
X
Switchable instantaneous/short time and
ground fault (AKR only, not UL listed)
Table 4. Trip Unit catalog number suffixes for optional
functions.
MicroVersaTrip PM catalog numbers contain an
additional one- or two-letter suffix to indicate the
communication, metering, and relaying functions
installed, as shown in Table 5. MicroVersaTrip Plus
catalog numbers do not have this final suffix.
SS
S
Su
u
u
uffffffffiiiix
x
x
x
F
F
F
Fu
u
u
un
n
n
nccc
cttttiiiio
o
o
on
n
n
n
(none)
MicroVersaTrip Plus Trip Unit
PM
Metering, relaying, and communication
M
Metering and communication
P
Relaying and communication
Table 5. MicroVersaTrip PM Trip Unit suffixes for
communication, metering, and relaying.
Finally, if the Trip Unit is ordered as a replacement,
an “R” suffix is appended to the catalog number.
For example, a Trip Unit with catalog number
B210LSIGZ1PM has the following functions:
B2 -- Trip Unit for Power Break II with maximum
CT of 2000 A
10 – breaker current sensor (CT) of 1000 A
L -- long-time overcurrent protection
S -- short-time overcurrent protection
I -- adjustable instantaneous protection
G -- ground-fault protection
Z1 – ground-fault zone-selective interlock
