Siemens JXD2 - Page 5

Information
and
Instructions
General
Information
General
JD
and
LD
-
Frame
Sentron
Series
Circuit
breakers
,
as
shown
on
pages
5
and
6
,
are
for
use
in
individual
enclosures
,
switch
-
boards
and
panelboards
.
They
are
available
as
thermal
mag
-
netic
with
interchangeable
trip
units
(
types
JD
6
(
-
A
)
,
HJD
6
(
-
A
)
,
HHJD
6
,
LD
6
(
-
A
)
,
HLD
6
(
-
A
)
,
HHLD
6
)
,
thermal
magnetic
with
non
-
interchangeable
trip
units
(
types
JXD
2
(
-
A
)
,
JXD
6
(
-
A
)
,
HJXD
6
(
-
A
)
,
HHJXD
6
,
LXD
6
(
-
A
)
,
HLXD
6
(
-
A
)
,
HHLXD
6
)
,
current
limiting
with
non
-
interchangeable
trip
units
(
types
CJD
6
and
CLD
6
)
instantaneous
magnetic
trip
only
(
motor
circuit
protec
-
tors
-
types
JXD
6
-
ETI
,
LXD
6
-
ETI
,
CJD
6
-
ETI
,
CLD
6
-
ETI
)
and
molded
case
switches
(
types
JXD
2
,
JXD
6
,
LXD
6
,
CJD
6
,
CLD
6
)
.
For
100
percent
applications
see
pages
46
thru
50
.
CJD
6
and
CLD
6
circuit
breakers
combine
thermal
magnetic
construction
for
overload
protection
and
an
additional
set
of
"
blow
-
apart
"
contacts
in
conjunction
with
the
Sentron
Series
standard
"
blow
-
apart
"
contacts
.
This
arrangement
provides
for
current
limiting
protection
under
high
fault
interrupting
condi
-
tions
as
outlined
in
the
National
Electric
Code
,
Article
240
-
11
®
and
UL
489
®
standards
.
CJD
6
and
CLD
6
circuit
breakers
are
fuseless
and
therefore
require
no
blown
fuses
to
be
located
and
replaced
should
a
high
current
fault
occur
.
The
common
trip
feature
of
the
circuit
breaker
is
completely
retained
so
that
all
poles
of
the
circuit
breaker
open
when
caused
to
trip
due
T
to
an
overload
or
short
circuit
.
-
Nominal
Instantaneous
Values
Breaker
Ampere
Rating
Low
2
3
4
5
6
7
High
200
-
300
350
-
450
500
-
600
1250
1430
1610
1790
1960
2140
2320
2500
2000
2290
3430
2570
3860
2860
4290
3140
3430
5140
3710
4000
3000
4710
5570
6000
Circuit
breakers
are
calibrated
at
the
factory
,
under
controlled
temperature
conditions
for
applications
at
40
°
C
(
104
°
F
)
ambi
-
ent
to
meet
requirements
as
outlined
in
UL
489
Standard
for
molded
case
circuit
breakers
.
The
cover
on
the
trip
unit
is
sealed
to
prevent
access
to
the
trip
elements
.
Alterations
of
the
calibration
of
these
elements
should
not
be
attempted
.
Removal
of
the
special
sealed
line
cover
voids
the
Under
-
writers
Laboratories
,
Inc
.
listing
for
that
specific
circuit
breaker
.
Catalog
information
is
located
on
pages
46
-
50
.
Molded
Case
Switch
A
molded
case
switch
is
available
in
the
JXD
2
,
JXD
6
,
LXD
6
,
CJD
6
,
CLD
6
type
circuit
breakers
.
This
device
employs
the
same
operating
mechanism
as
the
thermal
magnetic
and
magnetic
only
units
.
A
preset
instantaneous
function
is
factory
installed
to
allow
the
switch
to
trip
and
protect
itself
at
a
high
fault
condition
.
No
overload
or
low
fault
current
protection
is
provided
.
This
protection
must
be
supplied
by
separate
over
-
current
devices
.
Catalog
information
is
located
on
pages
46
-
50
.
Pressure
wire
connectors
,
suitable
for
use
with
aluminum
or
copper
wire
,
are
available
for
all
JD
and
LD
-
Frame
circuit
breakers
.
Rear
connection
studs
or
plug
-
in
connector
assem
-
blies
are
also
available
(
2
and
3
-
pole
)
.
The
latter
mounting
arrangement
permits
removal
of
the
circuit
breaker
from
a
cir
-
cuit
without
removing
wiring
leads
.
Special
features
such
as
a
shunt
trip
,
auxiliary
and
alarm
switches
and
undervoltage
trip
devices
are
available
for
field
adaptation
.
The
installation
and
removal
of
these
devices
is
to
be
accomplished
by
qualified
personnel
only
.
These
devices
are
mounted
internally
and
Underwriters
Laboratories
listed
,
page
53
.
Information
con
-
cerning
these
special
devices
is
found
on
pages
26
-
29
and
51
.
Interrupting
Ratings
-
Symmetrical
RMS
Amperes
(
kA
)
Based
on
UL
489
Standards
The
interrupting
ratings
of
the
JD
and
LD
-
Frame
circuit
break
-
ers
are
based
on
circuits
adjusted
to
the
rated
short
circuit
(
at
specified
voltage
)
before
the
insertion
of
the
circuit
breaker
.
Thermal
Magnetic
JXD
2
(
-
A
)
,
JD
6
(
-
A
)
,
JXD
6
I
-
A
)
,
HJD
6
(
-
A
)
,
HJXD
6
(
-
A
)
,
HHJD
6
,
HHJXD
6
,
CJD
6
,
LD
6
(
-
A
)
,
LXD
6
(
-
A
)
,
HLD
6
(
-
A
)
,
HLXD
6
(
-
A
)
,
HHLD
6
,
HHLXD
6
,
CLD
6
type
circuit
breakers
provide
com
-
plete
overload
and
short
circuit
protection
when
applied
within
their
design
parameters
.
Overload
and
short
circuit
tripout
is
accomplished
by
time
-
delay
thermal
trip
elements
and
instan
-
taneous
magnetic
trip
devices
.
Nominal
instantaneous
trip
values
are
externally
adjustable
with
eight
trip
points
as
shown
at
the
top
of
the
next
column
.
RMS
Symmetrical
Amperes
(
kA
)
-
UL
A
.
I
.
R
.
kA
IEC
A
J
.
R
.
kA
f
-
—
Volts
AC
Breaker
Type
Volts
AC
(
50
/
60
Hz
)
Volts
DC
-
is
:
220
/
240
380
/
415
500
mils
.
250
240
480
600
(
teu
)
(
Ics
)
(
leu
)
(
Ice
)
:
(
leu
)
(
Ice
)
JXD
2
(
-
A
)
65
30
(
2
-
P
)
JD
6
{
-
A
)
,
JXD
6
(
-
A
)
LD
6
(
-
A
)
,
LXD
6
(
-
A
)
65
35
25
30
(
2
-
P
)
25
(
3
-
P
)
65
33
40
20
30
15
HJD
6
(
-
A
)
HLD
6
(
-
A
)
HJXD
6
(
-
A
)
HLXD
6
{
-
A
)
(
D
National
Electric
Code
(
240
-
11
)
"
A
current
limiting
overcurrent
protective
device
,
which
,
when
interrupting
currents
in
its
current
limiting
range
,
will
reduce
the
current
flowing
in
the
faulted
circuit
to
a
magnitude
substantially
less
than
that
obtainable
in
the
same
circuit
,
if
the
device
were
replaced
with
a
solid
conductor
having
com
-
parable
impedance
.
"
(
D
Underwriters
Laboratories
(
UL
489
,
Par
.
2.5
)
"
A
circuit
breaker
that
does
not
employ
a
fusible
element
and
that
when
operating
within
its
current
limiting
range
,
limits
the
let
-
through
l
2
t
to
a
value
less
than
the
l
2
t
of
a
1
/
2
cycle
wave
of
the
symmetrical
prospective
current
.
"
100
65
35
30
(
2
-
P
)
35
(
3
-
P
)
100
50
65
33
42
21
HHJD
6
,
HHLD
6
200
100
50
200
100
100
50
65
33
CJD
6
CLD
6
200
150
50
(
3
-
P
)
100
30
(
2
-
P
)
200
*
150
*
*
Meets
IEC
157
-
P
1
Interruption
levels
3
(-A)
(-A)
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