Optional 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 this option to
mount.
Maintenance Closing Device
This device is a manual charging handle assembly arranged
for use as a maintenance tool. The charge link is spring
l oaded and retained to make insertion into the breaker frame
less difficult and the pivot pin is retained by a chain. After
charging the closing springs, the handle must be manually
returned to the vertical position to allow closing the breaker.
Electrically Operated Interlock
These devices amount to 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 devices
are available for 48. 1 25 or 250 VOC as well as for 1 20 or 240
VAC. They are similar in construction and mount in the same
location as the undervoltage trip device. The electrical inter
lock 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 no ad
justments for pick-up or drop-out voltages of the device. The
devices are designed to be energized continuously.
Undervoltage Trip Device Option
This device automatically trips the circuit breaker on loss of
voltage. Either instantaneous or time-delay operation can be
supplied. A . 06 inch ( 1.5mm) gap should be maintained
between flap extension and pull link when the device is
energized. The pick-up and drop-out is set so that the device
picks
up
at a
voltage of
85%
or less and drops out between
30 and 60% of rated value. The devices are available for 24,
48 or 1 25 VDC and for 1 20 VAC.
Page23
Note:
Pick-up and drop-out are individually adjustable. Time
delay is adjustable from
.04
to 3 seconds (maximum 2
seconds on 24 VDC version).
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 indi
cates 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
m
The Static Trip
ill
device mounts onto a slide-type bracket on
the circuit breaker. To remove trip device, the terminal block
cover located above it should be removed, exposing the
terminal block screws. The lower row of screws can be
loosened with a screwdriver allowing the terminal block fan
ning 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. Just pull the trip device towards the front of
the circuit breaker. See "Static Trip Ill Information and Instruc
tion Guide", SG-31 1 8.
Bell Alarm Switch Option
This unit functions to operate a switch. A single- pole double
throw, or a double-pole double-throw switch is available. The
switch operator is connected to and 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
electrical 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 reclosing after a fault.
Mechanical Lockout
This
option consists of a manual reset for the tripping actuator,
with the normal automatic reset disabled. The breaker is held
trip free following an overcurrent trip, until manually reset.
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