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Accessories
Power
Supplies
Static
Trip lllC/CP/CPX modei trip
units
require external
15V
dc
control
power for the
communications microprocessor.
Three
power
supply
models
are
available with
suff
icient volt-ampere
capacity
for up to
2, 8
or
16
trip
units. Because BDUs require
the
sarne amount
of power as communicating
trip
units, you
must
count
both BDUs and
trip
units when determining
the
power supply capacity you need.
For example,
the
power
supply with
a
capacity
for
eight
trip
units
can only support four
trip
units
if you
attach
a
BDU
to
each
trip
unit.
The
power
suppiies have
I2OV
ac
1125V
dc input
and
typically
mount
in
an
insLri,ment
comparr-ent,
Typica
power
supply
mounted in rnstrument compartment
Portable Test
Set
-
Type
PTS4
Sremens'
portable test
set
type
PTS4
is
designed
for testing
Static
Trip
lll
trip
units. The
test
set
provides
a
means
of
testing
the
magnetic
tripping
actuator as well as the
trlp
unit.
The
portable
test set,
using power from
an
ordinary
120
volt
convenience
outlet, can provide clrcuit
breaker
testing
equivalentto
much
more
expensrve and cumbersome primary
current testing. The
instructions
for testing the
Static
Trip
lll
with
the
PTS4
were
presented
in
the
Testing sectron,
For
additional
information
see
Portabie
Test Set
-
Type
PTS4
lnstruction Guide
SG-31
38
Communications
Secondary
Disconnects
A
special
ly-designed
cornmunications secondary
disconnect
assembly is used for
Static
Trip
lllC/CP/CPX
trip
unit's
com-
munications,
l5V dc
control power
and
alarm signals.
This
communications
disconnect
has gold
plated contacts
for
reliable electrical connection. The communications discon-
nect is
self-aligning
and
makes contact
in the
connected
position only, Cubicle and breaker assemblies are
avallable
for
upgrades to Type
RL
circuit
breakers,
for
use
by
OEM
s
or
for
retrofit
applications.
Cubicle
Disconnect
in
Type
RL
circurt breaker compartment
Breaker Disconnect
on
Type
RL
crrcuit breaker
PTS4
Portable Test
Set
45
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