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Magnum PXR accessories
MAGNUM PXR PRODUCT GUIDE
PA013006EN September 2022 www.eaton.com
4
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.
ote:
N
Do not use a shunt trip monitoring circuit with a
continuous duty shunt trip.
Table 11. Shunt trip ratings
Control
voltages
Operational
volagte range
70-110%
Inrush power
consumption
Opening
time (ms)
Kit catalog
number
24 Vdc
17-26 Vdc
250 W
35
MST3
48 Vdc
34-53 Vdc
250 W
35
MTS4
110-125 Vdc
77-138 Vdc
450 W
35
MTS1
220-250 Vdc
154-275 Vdc
450 W
35
MTS2
110-127 Vac
77-140 Vac
450 VA
35
MST1
208-240 Vac
146-264 Vac
450 VA
35
MST2
Table 12. Continuous duty shunt trip ratings
Control
voltages
Operational
volagte range
70-110%
Inrush/
continuous
power
consumption
Closing
time (ms)
Kit catalog
number
24 Vdc
17-26
250 W/18 W
35
MSTL
48 Vdc
34-53
275 W/18 W
35
MSTH
60 Vdc
42-66
275 W/18 W
35
MSTD
110-127 Vac/Vdc 77-138
450 W/10 W
35
MSTA
220-250 Vac/Vdc 154-275
450 W/10 W
35
MSTR
