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Siemens SB Series Information And Instruction Manual page 50

Encased systems breakers 4000 ampere frame rating
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External Accessories
Drawout Pad lock and Close Blocking Devices
Padlock Device on Drawout Mechanism
A padlock device on the drawout mechanism pro­
vides the means to padlock the moveable drawout ele­
ment in the connected, test, or unlocked position . The
padlock device can also lock the interlock lever in the
interlock disengaged position to prevent the breaker from
being closed. This is an importantfeature. When padlocked
in the unlocked position, the moveable element can be
pulled to the fully withdrawn position . The device will
accommodate three padlocks.
The accessory kit consists of a padlock device and one­
way self-tapping screws to prevent its removal . It is
installed on the left side of the moveable drawout ele­
ment, just above the interlock lever.
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 one-way
screws as provided .
Drawout padlock device kit
Padlock device is installed above the interlock lever.
58
Close Blocking Device on SB Breaker
A close blocking device is used to prevent local close of the
breaker under normal operating conditions. The device is
a cover that mounts over the push-to-close pushbutton,
blocking normal access to this switch. A small hole in the
center of the cover provides a means to defeat the blocking
device in case of an emergency orfor test purposes. A small
screw driver or similar object may be inserted through the
hole to depress the close pushbutton.
The accessory kit consists of a blocking device and one­
way self-tapping screws to prevent its removal. Blind holes
for the self-tapping screws are located above and to the left
and below and to the right of the close pushbutton switch .
Before starting the installation, the breaker should be i n
the open position and the stored energy mechanism should
be discharged .
To install the device, secure it in place with the screws
provided .
'
'
Close Blocking Device Kit
Close Blocking Device is installed over the close
pushbutton switch.

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