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Magnum PXR accessories
Overview
A variety of accessory devices are available for use with
Magnum circuit breakers. Unless otherwise stated, they
are all considered optional devices in the sense that they
are not provided as standard on a manually operated
circuit breaker. Available accessories are identified here
and discussed in general terms. For more detailed
information and/or installation instructions, refer to the
individual instruction leaflets available on
www.Eaton.com/MagnumPXR.
Magnum circuit breaker accessories are designed to
fit all frame sizes. The accessories fall into one of three
categories:
Plug-in Electrical
•
Internal Electrical
•
Mechanical Devices
•
Plug-in electrical accessories
There are several Magnum plug-in electrical accessories.
Three types (shunt trip, spring release, undervoltage
release) can be viewed for identification by name and
rating through viewing windows located in the right front
of the breaker.
All the accessories below are plug-in type and can be
factory installed or field installed using a UL Listed kit. The
plug-in accessories are:
Shunt Trip (ST) (Through the window, see Figure 40
•
below)
Spring Release (SR) (Through the window)
•
Undervoltage Release (UVR) (Through the window)
•
Auxiliary Switch
•
Latch Check Switch
•
Figure 40. Through the window electrical accessories
Shunt trip (ST)
The shunt trip is an optional device on circuit breakers. It
opens the circuit breaker instantaneously when its coil is
energized by a voltage input. A total of two shunt trips can
be mounted in a Magnum breaker. Two different shunt trip
types are available:
The continuous duty coil (or 100% rated) type can
•
be continuously energized. It is useful in applications
where it is desired to keep the breaker tripped open
electrically.
The shunt trip type that has a cutoff switch removes
•
voltage from the coil once the breaker contacts are
opened.
The first shunt trip can be either type. The second shunt
trip must be continuous duty.
N
ote:
Do not use a shunt trip monitoring circuit with a
continuous duty shunt trip.
Table 11. Shunt trip ratings
Control
voltages
24 Vdc
48 Vdc
110-125 Vdc
220-250 Vdc
110-127 Vac
208-240 Vac
Table 12. Continuous duty shunt trip ratings
Control
voltages
24 Vdc
48 Vdc
60 Vdc
110-127 Vac/Vdc
220-250 Vac/Vdc 154-275
MAGNUM PXR PRODUCT GUIDE PA013006EN September 2022 www.eaton.com
Magnum PXR accessories
Operational
volagte range
Inrush power
Opening
70-110%
consumption
time (ms)
17-26 Vdc
250 W
35
34-53 Vdc
250 W
35
77-138 Vdc
450 W
35
154-275 Vdc
450 W
35
77-140 Vac
450 VA
35
146-264 Vac
450 VA
35
Inrush/
Operational
continuous
volagte range
power
70-110%
consumption
17-26
250 W/18 W
34-53
275 W/18 W
42-66
275 W/18 W
77-138
450 W/10 W
450 W/10 W
4
Kit catalog
number
MST3
MTS4
MTS1
MTS2
MST1
MST2
Closing
Kit catalog
time (ms)
number
35
MSTL
35
MSTH
35
MSTD
35
MSTA
35
MSTR
39
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