Plus™ and
PM™
Units
1.
Introduction
Maximum
Character
Allowable CT
2
2000 A
3
2500/3000/3200 A
4
4000 A
5
5000 A
Table
2.
Breaker frame size maximum CT mferred 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.
Characters
CT
Size Trip Unit Series
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
1 600 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.
4
Suff"IX
Protective Function
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 Zone-selective interlock:
72.
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.
Suff"IX
Function
(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
1 0 - breaker current sensor (CT) of 1 000 A
L - long-time overcurrent protection
S - short-time overcurrent protection
I - adjustable instantaneous protection
G - ground-fault protection
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