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Magnum PXR accessories
MAGNUM PXR PRODUCT GUIDE
PA013006EN September 2022 www.eaton.com
4
Auxiliary switch
An auxiliary switch is an optional device providing remote
electrical indication if the circuit breaker is open or closed.
Up to three auxiliary switches can be mounted in one
breaker. Each switch has four form C contacts for a total of
12 available form C contacts. Each form C contact consists
of one normally open and one normally closed contact
with a common return.
Table 15. Auxiliary switch, overcurrent trip switch, and
cell switch contact ratings
Control voltages
Contact rating inductive load (amperes)
24 Vdc
0.5
48 Vdc
0.5
125 Vdc
0.5
250 Vdc
0.25
120 Vac
10
240 Vac
10
250 Vac
10
Internal electrical accessories
Other electrical accessories are mounted inside the circuit
breaker. They can be factory or field installed. There are
three different internally mounted accessories:
•
Mechanical Trip Flag Pop-out Indicator
•
Overcurrent Trip Switch (Bell Alarm)
•
Motor Operator
Mechanical trip flag pop-out indicator
The mechanical trip flag pop-out indicator is an overcurrent
indication feature that can be supplied as an option on
Magnum breakers with integral trip units. This device is
located just above the trip unit on the breaker’s front face-
plate. In the event the trip unit trips the breaker, the red
trip flag releases and pops out to give local visual indica-
tion. This trip indication is in addition to any LED trip indica-
tion next to the protection feature. An optional Overcurrent
Trip Switch (OTS) is available should an electrical lockout
be required on an overcurrent trip condition.
The pop-out mechanical trip indicator is available in two
versions:
Interlocking trip indicator
—When activated via a trip-
ping event, the interlocked version of the trip indicator
acts to provide local visual indication that the breaker has
tripped, change the OTS contact position, and interlock the
breaker such that the breaker cannot be reclosed until the
mechanical trip indicator is reset.
Non-interlocking trip indicator
—This version acts only
to provide visual local indication of a tripping event and
change the OTS contact position
The red flag can be reset by manually pushing it back in.
The breaker can be reclosed, even if the flag is not reset.
If the trip unit trips the breaker on an overcurrent
condition:
•
Red mechanical trip flag indicator pops out
•
OTS contacts change state
The OTS is reset by manually pushing in the red trip flag.
When the trip flag is reset, the OTS contacts return to
their normal state.
When using an interlocking trip indicator, a remote trip
reset option is available to electrically reset the trip indi-
cator by applying the proper rated control voltage. The
remote trip reset feature is very useful in applications
where direct access to the circuit breaker is limited, for
example a wind turbine. The remote trip reset will act to
reset the trip indicator and OTS but will not reset the trip
unit status LEDs that can be reset via communications.
Figure 46. Auxiliary switch