26
Series NRX Low Voltage Power (Air)
Circuit Breakers User Manual
EATON CORPORATION
www.eaton.com
Instructional Book
MN01301003E
Effective July 2011
Non-interlocked pop-out mechanical trip indicator
A non-interlocking red, pop-out mechanical trip indicator, located to
the right of the trip unit on the breaker’s front faceplate (
Figure 6
),
operates by releasing and popping out any time the breaker trips due
to an overcurrent condition. It will not prevent the breaker from being
reclosed. The indicator is reset manually by pushing it back in.
An optional overcurrent trip switch (bell alarm) can be used in
conjunction with the mechanical trip indicator. The overcurrent trip
switch operates off the position of the mechanical trip indicator, and is
reset when the indicator is reset.
Interlocked pop-out mechanical trip indicator
An interlocked, red, pop-out mechanical trip indicator is an optional
feature. It is located in the front of the breaker near the top and to the
right of the trip unit (
Figure 6
). It operates by releasing and popping
out any time the circuit breaker trips due to an overcurrent condition.
otee:
N
The interlocked mechanical trip indicator will prevent the breaker
from being reclosed until the red, pop-out indicator is reset or pushed
back in.
The indicator is reset manually by pushing it back in. If the interlocked
indicator is not reset, the circuit breaker will not close until the
indicator is pushed back in.
An overcurrent trip switch (bell alarm), discussed later in this section,
that operates off the position of the mechanical trip indicator is also
available.
Operations counter
The operations counter is a mechanical device used to provide a record
of the number of circuit operations. It can be viewed through the
breaker’s front cover (
Figure 6
).
Off key lock
The off key lock secures the circuit breaker in the OFF position. It can
be viewed through the front cover (
Figure 6
). The customer supplies
the key lock. The provisions available are for Kirk, Castell, Ronis, and
CES.
Pushbutton cover
Padlockable covers are available to limit access to the ON and OFF
pushbuttons.
Safe-off pushbutton cover
When padlocked, it maintains the OFF button in the actuated position,
which prevents closure of the breaker.
Cassette safety shutters
Automatically operated insulating type safety shutters (
Figure 4
) are
available for use with the drawout cassette to cover the fixed primary
contacts when the circuit breaker is not in the CONNECT position.
Door escutcheon
The door escutcheon is a molded frame used to seal the space
between the circuit breaker and the compartment door cutout. It is
supplied with a mounting gasket. Refer to IL01301012E for installation
information.
IP55 dust and water resistant cover
A hinged dome-shaped waterproof cover attaches to the metal
compartment door to provide waterproof protection for the circuit
breaker.
Mechanical interlock
Mechanical interlocks are available to interlock the closing of two or
three Series NRX circuit breakers. The mechanical interlock holds one
or more circuit breakers tripped (prevents closure) when others are
closed. Consult Eaton for details.
