Masterpact™ MP ci rcu it breaker
accessories
14
Three types of voltage release can be used
for remote opening of Masterpact circuit
breakers:
•
shunt trip (MX)
•
instantaneous undervoltage trip device
(MN)
•
time deiayed undervoltage trip device
(MNR)
shunt trip (MX)
The release is rated for continuous duty and
operates with control voltages between 85
and 110%.
However, when series connected with an "a"
auxiliary switch, the shunt trip can be
operated with 55% or more of its rated
voltage and can be used for ground fault
protection when combined with a Class 1
Ground Fault Sensing Element.
Field installable.
instantaneous undervoltage
trip device (MN)
This release instantaneously opens the
breaker when its supply voltage drops below
a value between 35% and 70% of its rated
voltage.
If the release is not energized, the breaker
cannot be closed (either manually of
electrically). Any attempt to close will have
no effect on the main contacts.
Closing is possible when the release voltage
reaches 85% of its rated value.
Field installable.
time delayed undervoltage
trip device (MNR)
To prevent the breaker from tripping in the
event of transient voltage drops, this
release has a buUt-in adjustable time delay.
If required, this time delay can be overridden
by connecting an external switch on an
additional circuit (wired by the user).
Field installable.
opening coils
Release combinations
Each Masterpact circuit breaker can be
equipped with :
•
1 shunt trip (MX)
+
1 undervoltage trip
device (MN or MNR)
•
or 2 shunt trips (MX)
- -,-
open
I
+
f
=t
1c1
-4--
operating time
70 ms
control voltage (V)
60Hz 120-240-4 80-600
DC
24-48-48-125
AC
20VA
DC
15W
--,-
remote
open
t
=t
-4-
MN MNR
operating time
(ms)
0,090 0.5-0.9-1.5-3
60Hz
120 120
240
480 480
600
DC
24
48
125
consumption
(inrush and sealed) :
AC
20VA 20VA
DC
15W 15W
MERLIN GERIN
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