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Siemens SB Series Information And Instruction Manual page 51

Encased systems breakers 4000 ampere frame rating
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External Accessories
Cell Switches
Hazardous Voltage.
Will cause severe injury or death.
Do not attempt to i nstall Cell Switch
accessory into Stationary Drawout
Element with voltage present.
CAUTION: Do not attempt to install an accessory with
the breaker "Closed" or "Charged". Make certain
breaker is "Open" and " Discharged" as shown above.
Personal injury or mechanical damage may occur.
Cell Switch Accessory Kit
Cell Switches on Drawout Mechanism
Cell switches are used on drawout S8 breakers as signal
contacts to i ndicate when the moveable drawout element is
in a position other than the connected position. The position
of the moveable drawout element is indicated by the open/
closed status of the cell switches as follows:
"A" or "NO" contacts - Open when the moveable drawout
element is in the test, unlocked, or
withdrawn position.
Closed when the moveable draw­
out element is in the connected
position.
A
DANGER
"8" or "NC" contacts - Closed when the moveable draw­
out element i s in the test, unlocked,
or withdrawn position.
Open when the moveable draw
out element is in the connected
position.
A maximum of four "A" and "8" cell switches may be
installed in a breaker. The switch contact ratings are given
in the following table.
Switch Contact Ratings
Supply Voltage
1 20 VAC
240 VAC
480 VAC
24 VDC
1 25 VDC
The cell switches are installed on the left-rear flange of the
stationary drawout element.
The cell switch assembly should be installed prior to the
moveable drawout element being installed in the switch­
board. If the drawout elements have already been installed,
the moveable drawout element will have to be removed
from the switchboard to allow access to the installation
location.
To i nstall the cell switch assembly, attach assembly to the
left-rear flange with two (2) 8/32" pan head screws with lock
washers in the threaded holes on the flange.
Cell Switches are installed on the left-rear flange of the station­
ary drawout element
Ampere Rating
1 0 Amps
1 0 Amps
6 Amps
3 Amps
0.5 Amps
59

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