External Accessories
Key Interlock and SB Breaker Pad lock Device
Key Interlock on SB Breaker
Key interlocks are often used to control local sequencing
of breakers when multiple power sources are available
for a common load . When the key is removed, the key
interlock holds the open pushbutton switch in the trip
position, preventing the breaker from being closed. There
fore, if the same key is required by each breaker in a multiple
power source system, no two breakers in the system can
be closed at the same time.
To remove the key from the key interlock, press and hold the
"open" pushbutton ; turn and remove key.
The breaker key interlock is not field installable. It is installed
at the factory in the central escutcheon of the front panel,
directly above the push-to-open pushbutton switch.
Key is installed in the central escutcheon.
Mechanical Interlock
The mechanical interlock device provides the capability
to prevent simultaneous closing of two SB breakers. The
first breaker to close will keep the other breaker in the open/
tripped position. The interlock device is available for
fixed mounted breakers installed side-by-side or in the
same vertical section. On drawout configured breakers,
the interlock device is available for breakers installed in
adjacent cubicles, either vertically or horizontally.
The mechanical interlock device is
not
field installable.
Padlock Device on Breaker
A padlock device on the breaker allows the breaker to be
padlocked in the open position, preventing the breaker
from being closed . It will accommodate three padlocks.
The accessory kit consists of a padlock device and one
way self-tapping screws to prevent its removal . The
device is installed over the open pushbutton switch. Blind
holes for the self-tapping screws are located above and
to the left, and below and to the right of the open push
button switch.
Before starting the installation , the breaker should be in
the open position, and the stored energy mechanism
should be discharged .
To install the device, secure it in place with the screws
as provided.
SB Breaker Padlock Device Kit
The padlock device is installed over the open pushbutton.
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