29
User Manual MN013016EN
Effective July 2022
Magnum PXR and Power Defense SB low
voltage power circuit breakers user manual
EATON www.eaton.com
Figure 43. Motor operator installed in a standard frame circuit
breaker
Mechanical accessories
There are 10 optional mechanical type accessories:
•
Operations counter
•
Off key lock
•
Cassette lock
•
Pushbutton cover
•
Prevent close cover
•
Lockout cover
•
Cassette safety shutters
•
Cassette cell switch
•
Terminal Block Extension Bracket
•
Door escutcheon
•
Waterproof cover
•
Mechanical interlock
Operations counter—The operations counter is a mechanical device
used to provide a record of the number of circuit operations. It is
mounted in the lower right portion of the circuit breaker and can be
viewed through the front cover (Figure 44).
Operations
counter
OFF
key lock
Figure 44. Cover mounted key lock and operations counter
Off key lock—The off key lock secures the circuit breaker in the
OFF position. It is mounted in the lower right portion of the circuit
breaker and can be viewed through the front cover (Figure 44). The
customer supplies the key lock. The provisions available are for Kirk,
Castell, Ronis, or CES.
Cassette lock—A cassette-mounted lock can be used in conjunction
with different interlocking schemes (such as main-tie-main)
(Figure 45). The lock holds the circuit breaker trip-free in the
CONNECTED position, preventing it from being closed.
Up to three lock cylinders can be installed on one cassette.
Eaton supplies the lock provisions only. The customer is
responsible for the locks, which can be Kirk or Castell.
Figure 45. Cassette-mounted key lock
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