Levering Circuit Breaker - Eaton Magnum Air MWN-408 User Manual

Magnum
Figure 2-8: Connect Position
MAKE CERTAIN THAT THE CIRCUIT BREAKER IS
FULLY INSERTED INTO ITS COMPARTMENT BEFORE
ANY ATTEMPT IS MADE TO LEVER THE CIRCUIT
BREAKER. ATTEMPTING TO LEVER THE CIRCUIT
BREAKER IN BEFORE IT IS FULLY POSITIONED
INSIDE ITS COMPARTMENT CAN RESULT IN
DAMAGE TO BOTH THE CIRCUIT BREAKER AND THE
COMPARTMENT.
Figure 2-9: Cassette Label Showing Disconnected, Test and
Connected Position of Recessed Cover
14
•
Full Breaker Operation
•
Primary, Secondary and Ground Connections Made
•
Fully Racked into Cassette (Compartment)
CAUTION
2.7.2

levering circuit breaker

The circuit breaker is now ready to be levered. With the
circuit breaker OPEN, the levering device access door can
be raised. The levering device is hand operated using a
standard 3/8" square drive and ratchet, which is not
provided (Figure 2-10). As long as the levering access
door is raised, the circuit breaker is held trip free. Begin
by rotating the levering-in screw to the full
counterclockwise (DISCONNECT) position.
Close the compartment door and begin levering the
breaker into its different positions using a clockwise
ratcheting motion. The circuit breaker can be levered
with the compartment door open or closed, but it is
advisable to close the door prior to levering.
The position of the circuit breaker within its compartment
is indicated by color coded position indicators (Red =
Connect, Yellow = Test, Green = Disconnect)
(Figure 2-10). When the circuit breaker is levered fully to
the DISCONNECT or CONNECT position the levering
shaft hits a hard stop; do not exceed 34.2 N.m. of torque
or the levering mechanism may be damaged. To remove
the circuit breaker from its compartment, follow the
procedure just described using a counterclockwise
ratcheting motion.
THE CIRCUIT BREAKER MECHANISM IS
INTERLOCKED SUCH THAT CHARGED CLOSING
SPRINGS ARE AUTOMATICALLY DISCHARGED IF
THE CIRCUIT BREAKER IS LEVERED INTO OR OUT
OF THE CELL. DISCHARGE TAKES PLACE
BETWEEN THE DISCONNECT AND TEST POSITION.
NOTICE
1812.900A