Eaton Magnum PXR, User Manual

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User Manual MN013016EN
Effective July 2022
Magnum PXR and Power Defense SB low
voltage power circuit breakers user manual
EATON www.eaton.com
Purpose
This instructional booklet is expressly intended to cover the
installation, operation, and maintenance of Magnum PXR and
Power Defense SB (PD-SB) circuit breakers . These circuit breakers
may be supplied as part of complete switchboard assemblies or as
separate components . This manual applies only to the circuit breaker
and (if drawout) its mating cassette . In the case of fixed versions
of Magnum PXR and PD-SB circuit breakers, certain sections of
this manual, referring to such items as position interlocks and the
drawout mechanism, will not apply .
Trip units associated with Magnum PXR and PD-SB power circuit
breakers will be addressed in a general manner in this manual .
Specific trip unit details and time-current characteristic curves are
covered in separate documents specific to the trip units .
Magnum PXR and PD-SB circuit breaker accessory items are
discussed briefly in this manual . Field installation instructions for
such items, however, are covered in individual instructional leaflets
specific to the accessory . This information is also available from the
Eaton website at www .eaton .com/magnumpxr .
For application information, consult Eaton or see applicable product
guides, technical documents, application publications, and/or
industry standards .
Safety
All safety codes, safety standards, and/or regulations must be
strictly observed in the installation, operation, and maintenance of
this equipment .
m WARNING
THE WARNINGS AND CAUTIONS INCLUDED AS PART OF THE PROCEDURAL
STEPS IN THIS MANUAL ARE FOR PERSONNEL SAFETY AND PROTECTION
OF EQUIPMENT FROM DAMAGE. AN EXAMPLE OF A TYPICAL WARNING
LABEL HEADING IS SHOWN ABOVE TO FAMILIARIZE PERSONNEL WITH
THE STYLE OF PRESENTATION. THIS WILL HELP TO ENSURE THAT
PERSONNEL ARE ALERT TO WARNINGS. IN ADDITION, CAUTIONS ARE
ALL UPPER CASE AND BOLDFACE.
All possible contingencies that may arise during installation,
operation, or maintenance, and all details and variations of this
equipment do not purport to be covered by these instructions . If
further information is desired by purchaser regarding the particular
installation, operation, or maintenance of particular equipment,
contact the local Eaton representative .
Section 1: Introduction
General information
The Magnum PXR and PD-SB power circuit breakers can be fixed
or drawout air circuit breakers using an electronic tripping system .
All breakers are designed for use in both switchboard and metal-
enclosed switchgear assemblies having a maximum voltage of
635 Vac . Magnum PXR (MPS and MPN) and PD-SB (SPS and
SPN) circuit breakers are available in four physical frame sizes with
continuous current ratings from 800 A through 5000 A (Magnum
PXR available through 6000A), and interrupting capacities from 42 kA
to 100 kA . The four physical frame sizes have common height and
depth dimensions, differing only in width ( Figure 1 ) . Circuit breaker
nameplates provide complete rating information . All Magnum PXR
and PD-SB circuit breakers are 100% rated, UL® Listed, and are
built and tested in an ISO® 9002 certified facility to applicable
NEMA®, ANSI, IEEE®, and UL standards ( Table 1 , Figure 2 , and
Figure 3 ) .
Magnum PXR and PD-SB circuit breakers use a rigid frame housing
of engineered thermoset composite resins that has high-strength
structural properties, excellent dielectric characteristics, and arc
tracking resistance .
MPS, MPN, SPS, and SPN drawout circuit breakers are a
through-the-door design, having three breaker positions with the
compartment door closed (CONNECT, TEST, DISCONNECT) and one
position out of its compartment on extension rails (REMOVE) . The
operating mechanism is a two-step stored energy mechanism, either
manually or electrically operated .
When withdrawn on captive compartment cassette extension
rails, MPS, MPN, SPS, and SPN circuit breakers can be inspected,
accessory items added, and minor maintenance performed . The
inside of the compartment can also be inspected with the circuit
breaker on its extension rails .
m NOTICE
PLEASE READ AND UNDERSTAND THESE INSTRUCTIONS BEFORE
ATTEMPTING TO UNPACK, INSTALL, OPERATE, OR MAINTAIN THIS
EQUIPMENT. STUDY THE BREAKER AND ITS MECHANISM CAREFULLY
BEFORE ATTEMPTING TO OPERATE IT ON AN ENERGIZED CIRCUIT.
m WARNING
MAGNUM AND POWER DEFENSE CIRCUIT BREAKERS SHOULD NOT UNDER
ANY CIRCUMSTANCES BE APPLIED OUTSIDE THEIR NAMEPLATE RATINGS.
OPERATION OUTSIDE OF THESE RATINGS COULD RESULT IN DEATH,
BODILY INJURY, OR PROPERTY DAMAGE.