Eaton Cutter-Hammer SPB-100 - Undervoltage Release

I
.
B
.
29
-
801
C
Page
17
“
b
”
contacts
-
Closed
when
breaker is
open
and
open
when
breaker
is closed
.
any
closing
operation
.
The electrical
operator
is
designed
to
charge
the
springs
automatically
when
they
are
discharged
.
When
the
springs
are
completely charged
,
the
motor
cir
-
cuit is
disconnected
by
a
spring
charged
contact
.
A
yel
-
low
mechanical
target
indicator shows the
“
spring
charged
”
position
of
the
mechanism
.
Remote
charging
can
be
accomplished
by
using
a
maintained
contact
in
the
electrical
operator
control circuit
.
If
for
any
reason
the
charging
control
power
should
be
interrupted
during
an
electrical
charging
operation
,
the
charging
sequence
may
be
completed
with
the
manual
charging
handle
.
The
electrical
operator
is
internally
bracket
mounted
in
the
right
-
hand
pole
.
The
spring
charged
contact
is
installed
in
the
center
pole
(
Figures
5
-
5
and
5
-
6
)
.
A
maximum
of
four
S
.
P
.
D
.
T
.
spare
auxiliary
switches
may
be
installed
in
a
single
breaker
.
All
components
are
internally
mounted
in
the
right
-
hand
pole
(
Figures
5
-
7
and
5
-
8
)
.
5
-
6
UNDERVOLTAGE
RELEASE
An
undervoltage
release
operates
to
open
the
breaker
when
the
monitored
voltage
is
equal
to
or
less
than
the
release
setting
.
Normally
the
UVR coil
is
connected
to
the
line side
of
the
circuit
breaker
without
an
auxiliary
switch
in
the
circuit
.
The UVR
will
automatically
reset
when
the
breaker
main
contacts
open
.
Should
an
attempt
be
made
to
dose
the
breaker
during
an
undervoltage
condition
,
the
breaker
main
contacts
may
make
contact
.
The
undervoltage
release
will
operate
instantaneously
if
the
monitored
voltage
should
dip
into
the
dropout
volt
-
age range
.
A
time
delay
of
up
to
0.5
seconds
may
be
obtained
with
the
addition
of
a
remote
mounted
time
delay
device
(
Section
5
-
7
)
.
The
undervoltage
release
and
any
required
supplemen
-
tal
resistors
and
/
or
bridge
are
internally
mounted
in
the
center
pole
(
Figures
5
-
9
and
5
-
10
)
.
5
-
5
AUXILIARY
SWITCH
Auxiliary
switches
are
used
in
remote
control circuits
for
interlocks
,
indicating
lights
,
and
signal
contacts
to
indi
-
cate
the
open
or
closed
position
of
the
breaker
main
contacts
.
The
position
of
the main
contacts
is
indicated
by
closed
or
open
switches
as
follows
:
“
a
”
contacts
-
Open
when breaker
is
open
and
closed
when
breaker
is
closed
.
Figure
5
-
3
Spring
Release
Kit
without
Anti
-
Pump
Relay
Figure
5
-
4
Anti
-
Pump
Relay
Shown
Installed
Under
Handle Hub
E
;
T
*
N
Effective
7
/
00
Courtesy of NationalSwitchgear.com