Safety Features; Safety Practices; Figure 1. Family Of Magnum Pxr Low Voltage Power Circuit Breakers (800-6000 A); Figure 2. Typical Magnum Pxr Nameplate - Eaton Magnum PXR User Manual

User Manual MN013016EN
Effective July 2022
Figure 1. Family of Magnum PXR low voltage power circuit breakers (800–6000 A)

Safety features

Magnum PXR and PD-SB circuit breakers and associated drawout
equipment are manufactured with built-in interlocks and safety
related features . They are provided to reduce hazards to operating
personnel and provide proper operating sequences .
a
c
d
e
Low voltage power circuit breaker family name
a
Breaker family designation number
b
Breaker frame size in amperes
c
Interrupting capacity rating
d
Factory equipped accessories
e

Figure 2. Typical Magnum PXR nameplate

6
EATON www.eaton.com
Narrow frame
Standard frame
b
Magnum PXR and Power Defense SB low
voltage power circuit breakers user manual
Double narrow frame
Double-wide frame
m WARNING
MAGNUM AND POWER DEFENSE CIRCUIT BREAKERS ARE ROBUST AND
ARE PROVIDED WITH SAFETY FEATURES. NEVERTHELESS, THE VOLTAGES,
CURRENTS, AND POWER LEVELS AVAILABLE IN AND AROUND THIS
EQUIPMENT WHEN IT IS IN OPERATION ARE EXTREMELY DANGEROUS
AND COULD BE FATAL. UNDER NO CIRCUMSTANCES SHOULD INTERLOCKS
AND OTHER SAFETY FEATURES BE MADE INOPERATIVE, AS THIS MAY
RESULT IN DEATH, BODILY INJURY, OR PROPERTY DAMAGE.

Safety practices

To protect personnel associated with the installation, operation,
and maintenance of this equipment, the following practices must
be followed:
1. Only qualified electrical personnel familiar with the equipment,
its operation, and the associated hazards should be permitted
to work on the equipment . Additionally, only qualified personnel
should be permitted to install or operate the equipment .
2. Always be certain that the primary and secondary circuits are
de-energized or the circuit breaker is removed to a safe work
location before attempting any maintenance .
3. For maximum safety, only insert a completely assembled breaker
into an energized cell .
4. Always ensure that drawout circuit breakers are in one of their
designed cell positions, such as CONNECT, TEST, DISCONNECT,
or REMOVE . A circuit breaker permitted to remain in an
intermediate position could result in control circuits being
improperly connected, resulting in electrical failures .