30
User Manual
MN013016EN
Effective July 2022
Magnum PXR and Power Defense SB low
voltage power circuit breakers user manual
EATON
www.eaton.com
Pushbutton cover
—Padlockable covers are available to limit access
to the OPEN and CLOSE pushbuttons (
) . They can be
installed with either or both pushbutton covers in place .
Figure 46. OPEN–CLOSE pushbutton lockable cover plate
(Magnum DS shown)
Prevent close cover
—All access to the CLOSE pushbutton can be
prevented by adding the fixed Prevent Close Cover to the
pushbutton cover .
Lockout cover
—When padlocked, it maintains the OPEN button in
the ACTUATED position, which prevents closure of the breaker .
Cassette safety shutters
—Automatically operated insulating type
safety shutters are available for use with the drawout cassette .
When the drawout circuit breaker is levered from the CONNECT
position, the shutters automatically close to cover the fixed primary
contacts (
) . When the circuit breaker is levered into the
cassette, the shutters automatically open, permitting primary
) .
Figure 47. Typical safety shutters in CLOSED position
Figure 48. Typical safety shutters in OPEN position
Cassette cell switch
—The cassette cell switch is a compartment
position switch for drawout circuit breakers . It is available in a 4 Form
C or 8 Form C contact configuration, and mounts on the right side of
the cassette (
and
) . Refer to the ratings in
for cell switch contact information . The cell switch changes status
between the TEST and CONNECT positions .
Figure 49. Cell switch (drawout position indicator) unmounted
Figure 50. Cell switches mounted on cassette
