Citadel 2.0 - Instruction Manual - page:
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If Customer’s wish to have an interlock that prevents the switchgear door from opening
if the breaker is racked in, they will need to loosen the two mounting screws, rotate the
bracket horizontally and then insert and tighten the two mounting screws.
If the interlock is ACTIVATED - THEREFORE; Note the following:
1. If this interlock is active and the breaker is racked-in with the door open – you will not
be able to close and latch the door thereafter. The breaker position indication arm that
would engage the interlock bracket will now be banging into that same bracket when you
try to close the door.
You will have to rack the breaker out, close the door and re-rack the breaker into the
connect position through the lower racking port hole in the switchgear front door.
2. If the breaker is racked in and someone attempts to open the door – IT WILL NOT
OPEN ! DO NOT FORCE IT ! You will only bend the door.
Trip the breaker open and rack the breaker to the DISCONNECT position via the racking
port on the switchgear front door. Then the door will easily open.
Customers who wish to open and close the switchgear door regardless of the breakers
racked-in position should leave this interlock in the De-activated positon or remove it
entirely. After removing the bracket - replace the mounting screws in the front door holes to
seal those holes permanently.
Discharge of the Closing Spring
It is a requirement of Standards for medium voltage draw-out switchgear that the closing
spring of a circuit breaker is DIS-CHARGED as it is withdrawn from its cubicle. The Citadel
breaker will discharge the energy of the close spring in both directions of insertion into a
cell and extraction from a cell. The close-spring discharge function is basically a close /
trip operation. As the breaker rolls over the switchgear’s front door saddle area – there
are fabricated “bumps” on the floor that will lift the breaker’s close and trip levers thereby
discharging the energy that would be stored in a close-spring
that might have been charged.
Note – the discharging of Citadel close-spring is the same as closing the breaker and
therefore there will be a loud BANG when the operation occurs.
This is normal.
The entire sequence can be avoided if the Operator mechanically presses the manual trip
then close button and then presses the manual trip button again prior to rolling the breaker
into or out of the cubicle .
Disconnect position lock
(Patent pending)
A large ergonomically comfortable bar type handle for moving the Citadel in and out of the
cell and around on the floor is provided.
Directly below the bar type handle is a spring Interlock bar. As the breaker enters the
Disconnect position, this Interlock bar will ride up and fall behind inclined brackets on the
upper left and right hand sides of the Citadel switchgear cubicle. This joining of the Interlock
bar with the rear edge of the Disconnect brackets will occur both when the breaker is being
rolled into the cell / or racked out of Connect to the Disconnect position. The interlock bar
needs to be manually lifted to disengage it from the rear edge of Disconnect brackets. No
specific efforts are needed regarding this interlock when racking the Citadel into the cell’s
Connect position from the Disconnect position.
B R E A K E R O P E R A T I O N
