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A-53
The multifunctional chassis for Compact NS630b to 1600 devices is particularly
suited for incoming circuit breakers. Features include:
device connection and disconnection through a door, using a crank that can be
b
stored in the chassis
three positions (connected, test and disconnected) that are indicated:
b
locally by a position indicator
v
remotely by carriage switches (3 for the connected position, 2 for the disconnected
v
position and 1 for the test position)
circuit breaker ON/OFF commands through a switchboard front panel.
b
Locking
There are extensive locking possibilities:
chassis locking in connected, disconnected and test positions using three
b
padlocks and two keylocks, on the switchboard front panel
door interlock (inhibits door opening with breaker in connected position)
b
racking interlock (inhibits racking with door open)
b
locking in each of the connected, disconnected and test positions during device
b
connection or disconnection. Continuation to the next position requires pressing a
release button to free the crank.
Other safety function
Mismatch protection ensures that a circuit breaker is installed only in a chassis with
compatible characteristics.
The device may be in one of four positions on the
chassis:
b
connected position. The power circuits and auxiliary
contacts are all connected
b
test position. The power circuits are disconnected.
The auxiliary contacts are still connected and the
device can be operated electrically
b
disconnected position. The power circuits and
auxiliary contacts are all disconnected, however the
device is still mounted on the chassis. It can be
operated manually (ON, OFF, "push to trip").
b
removed position. All circuits are disconnected. The
device simply rests on the chassis rails and can be
removed.
mismatch protection
1
door interlock
2
racking interlock
3
keylock locking
4
padlock locking
5
position indicator
6
chassis front plate (accessible with cubicle door closed)
7
crank entry
8
reset button
9
crank storage
10
DB128070
Connected
Test
Disconnected
Removed
DB128071
1
2
8
10
9
7
5
6
4
3