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New generation IZM97, 99 low voltage air circuit breaker instruction manual
MN013010EN February 2020 www.eaton.com.cn
Section 4: Accessory devices
4-3 Mechanical devices
There are 11 optional mechanical type accessories:
• Operations counter
• Off key lock
• Cassette lock
• Pushbutton cover
• Prevent close cover
• Cassette safety shutters
• Cassette cell switch
• Door escutcheon
• Waterproof cover
• Mechanical interlock
• Mechanical (pop-out) trip indicator
Operations counter—The operations counter is a mechan-
ical device used to provide a record of the number of
circuit breaker open-close operations. It is mounted in the
lower right portion of the circuit breaker and can be viewed
through the front cover (Figure 4-11).
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 4-11). The customer supplies the key lock. The
provisions available are for Kirk, Castell, or Ronis.
Figure 4-11 Cover-mounted key lock and operations
counter
Figure 4-12 Cassette-mounted key lock
Cassette lock—A cassette-mounted lock can be used in
conjunction with different interlocking schemes (such as
maintie-main) (Figure 4-12). 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.
Pushbutton cover—A padlockable cover is available to limit
access to the ON and OFF pushbuttons. It can be installed
with either or both pushbutton covers in place.
OFF
key
lock
Operations
counter