circuit protection
electrical auxiliaries
for NC100
functions
Remote tripping and indication
of NC100 circuit-breakers.
description
auxiliary combinations
+
SD fault
indicating
switch
- Mounted to the left of the circuit-breaker
(SD and OF).
- Mounted to the right of the circuit-breaker
(MX + OF and MN).
+
+
Circuit-breaker
OF
auxiliary
contact
or
MX + OF
shunt trip
release
MN
undervoltage
release
remote tripping
remote indication
By means of an MX shunt trip or MN
undervoltage release.
OF contact
c this auxiliary contact installed to the left of
the circuit-breaker indicates the «open» or
«closed» position of the circuit-breaker.
SD fault indicating switch
c this auxiliary switch installed to the left of
the circuit-breaker indicates the «tripped on
fault» position of the circuit-breaker.
c visualisation of the fault on the front panel
by mechanical indicator lamp.
MX + OF shunt trip release
When energised, trips and opens the circuitbreaker with which it is associated:
c fitted with a cut-off contact
c fitted with an O + F contact that indicates
the «open» or «closed» position of the
circuit-breaker.
MN undervoltage release
When its supply voltage drops (between 70
and 35%) it trips and opens the circuitbreaker with which it is associated, and
prevents reclosing of this circuit-breaker until
its supply voltage is restored:
c complies with IEC 947-2 and IEC 157-1
standards
c use:
v emergency stop via push button
v safety feature on circuit supplying several
machines preventing «uncontrolled»
restarting of the motors.
technical data
c breaking capacity of the auxiliary switches
voltage
(V AC or DC)
breaking capacity
(A)
415 V
≤ 240 V
130 V
≤ 48 V
≤ 24 V
AC
AC
DC
DC
DC
3
6
1
2
6
technical data common to the auxiliaries
c connection: terminal pads for two 1.5 mm2
cables or one 2.5 mm2 cable.
MN s time-delayed undervoltage release
Undervoltage release controlling opening of
the circuit-breaker with which it is
associated. Allows a 0.5 second time delay
on a short supply interruption or voltage
drop.
technical data
c consumption of releases
type
22
voltage
(V CA or V CC)
(W or VA)
MX
AC
DC
pick-up 240
pick-up 200
MN
AC
DC
holding 4,1
holding 4,1
MN s
AC
DC
holding 4,1
holding 4,1
Merlin Gerin
circuit protection
electrical auxiliaries
for NC100
catalogue numbers
type
control voltage
(V AC)
(V DC)
catalogue
number
width
in mod.
of 9 mm
MX + OF shunt trip release
C2 C1
12
27136
220…415
110…220
24…48
110…125
24…48
27136
27137
27138
2
2
2
220…240
220…240
27140
2
220…240
220…240
27143
2
27132
1
27135
1
14
MN undervoltage release
instantaneous
D1 D2
u<
time-delayed s
27140
D1 D2
u<
OF auxiliary contact
11
12
27132
14
SD fault indicating switch
91
92
94
27135
additional information
Merlin Gerin
dimensions: page 31
23