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Devices

Operation Counter

This option consists of a mechanically operated counter

with a bracket that mounts at the bottom of the breaker

mounted  auxiliary  switch.  The  counter  arm  connects
through  a  spring  to  the  switch-operating  arm.  The
counter  is  non-resettable.  The  breaker  must  have  an
auxiliary switch for installation of this option.

Maintenance Closing Device

This device is a manual charging handle assembly

arranged for use as a maintenance tool. The charge

link is spring loaded and retained to make insertion into

the  breaker frame  less  difficult  and  a  chain  retains the
pivot pin. After charging the  dosing  springs,  the  handle
must be  manually  returned  to  and  held  in  the  vertical

position to allow closing the breaker.

Electrically Operated Interlock

This  device  is  an  additional  solenoid  that  must  be
energized before the  breaker can  be closed. When  the
device is de-energized,  the  breaker is  held TRIP  FREE

so  that  it  cannot  be  closed  either  electrically  or
manually.  The  device  is  a  derivative  of  the
Undervoltage  trip  device  and  mounts  in  the  same
location as the Undervoltage trip device.  The electrically
operated  interlock  has  a  mechanical  link  from  the
device  to  the  main  shaft  of  the  breaker  to  hold  the
device  in  the  picked-up  position  when  the  breaker  is

closed.  Once  closed,  the  device  can  be  de-energized
without  tripping  the  breaker.  There  are  adjustments  for
pickup and  dropout voltages  of the device.  (See  chart in

Figure 27

for selectable values) The device is

designed to be energized continuously.

Undervoltage Trip

Device

This device automatically trips the circuit breaker on

loss of voltage. The device has time delay settings of
instantaneous, and 1 ,

2 ,

or 3 seconds. The rated input

voltage, pickup voltage, and dropout voltage are

selectable using

DIP

switches, as shown in the chart in

Figure 3 1 .

A 0.06" ( 1 . 5mm) g a p should b e maintained between

flap extension and pull link when the device is
energ ized (See

Figure

3 1 ) .

The device  includes an L E D  indicator. When t h e  device
is energized  and  operating normally, the LED flashes.  If
the  voltage  drops  below  the  dropout  voltage,  the  LED
will  be  on  continuously to  indicate  an  impending trip.  If

the input voltage exceeds the rated voltage by

approximately 1 5%

(DC)

(AC),

the LED will be on

continuously to indicate excessive voltage input.

The device includes an internal fuse. This fuse is not
designed to protect the device, but rather, is intended to

avoid damage to the user's control power supply

the

event of failure of the Undervoltage device. If the fuse is

blown, damage to the Undervoltage device is likely, and
the device should be replaced.

Latch

Check Switch

This option is a small switch mounted on a bracket. The
switch operator is adjusted so the switch is operated by,

and  indicates the  position  of,  the  breaker trip  flap.  The
latch  check  switch  may be  used  in conjunction with the
electrical interlock or Undervoltage devices to delay the
application  of  voltage  to  the  close  coil  until  the
Undervoltage or Interlock device  has picked  up.

Static

Trip Ill

Overcurrent Device

The Static Trip I l l device mounts onto a slide-type

bracket on the circuit breaker. To remove the trip

device, the terminal block cover located above

should

be removed, exposing the terminal block screws. The

lower row of screws can be loosened with a screwdriver

allowing  the  cord  set fanning  strip  to  be  removed  from
the  terminal  block.  Removal  of  the  fanning  strip
exposes  a  mounting  screw.  This  screw  can  be
removed,  allowing  the  trip  device  to  be  removed  from
the  circuit  breaker.  To  remove  the  trip  device,  pull  the
trip  device  towards  the front of the  circuit breaker. See
'Static  Trip  Ill  Information  and  Instruction  Guide',
SG-3 1 1 8.

Bell Ala rm Switch

This u nit functions to operate a switch. A single-pole
double-throw, or a double-pole double-throw switch is

ava ilable. The switch operator is connected to, and is
operated by the tripping actuator. The switch operator

remains tripped even when the actuator is reset by the

circuit breaker. The switch operator must be reset either
manually or by an additional optional e lectrical reset
solenoid.

The  contacts  of the  bell  alarm switch  can  be  connected
in  series with  the  circuit  breaker  closing  coil,  to  provide
a  lockout  feature  to  prevent  re-closing  after  an

overcurrent tripping operation.

Bell Alarm Relay

This unit functions to provide a momentary closure and

opening of isolated contacts. The Static Trip device

supplies the relay coil in parallel with the tripping

actuator. The contacts return to the normal de
energized position after short time-delay (0.2-0.5

Second).

Mechanical Lockout

This  option  consists  of  a  manual  reset  for the  tripping
actuator, with the norm a l  automatic reset disabled. The
breaker  is  held  trip  free following  an  overcurrent  trip,

until manually reset.

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