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 (
) .
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 (
) . 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)
(
) . 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
