Function description
Function description
FK 3-12 spring operating mechanisms
FK 3-12 spring operating mechanisms
For circuit
For circuit brea
breakers
kers
06.04.2011
06.04.2011
48-020-212EN02
48-020-212EN02
3/15
3/15
70.26
70.26
70.24
70.24
70.42
70.42
70.31
70.31
70.44
70.44
70.43
70.43
71.09
71.09
71.35
71.35
Introduction
Introduction
The FK 3-12 third-generation spring operating mechanisms have been de-
The FK 3-12 third-generation spring operating mechanisms have been de-
signed as an integrated series. All mechanisms have the same functional units
signed as an integrated series. All mechanisms have the same functional units
and operate on the same principle. Dimensions and certain execution features
and operate on the same principle. Dimensions and certain execution features
are dictated by the maximum closing energy for each model.
are dictated by the maximum closing energy for each model.
Fonctional units
Fonctional units
70.23
70.21
70.20
70.23
70.21
70.20
7
70
0..2
25
5
7
70
0..2
22
2
Sché
Schématic
matic digram
digram
70.01
70.01
70.53
70.53
71.32
71.32
70.06
70.06
70.10
70.10
7
79
9..0
04
4
7
70
0..0
05
5
7
70
0..0
07
7
7
70
0..0
08
8
70.01
70.01 Motor
Motor
70.20
70.20 Trip
Trip spring
spring
70.05
70.05 Closing
Closing latch
latch
70.21
70.21 Auxiliary
Auxiliary switch
switch
70.06
70.06 Closing
Closing magnet
magnet
70.22
70.22 Motor
Motor limit
limit switch
switch actuating
actuating cam
cam
70.07
70.07 Manual
Manual CLOSE
CLOSE release
release
70.23
70.23 Motor
Motor limit
limit switch
switch lever
lever
70.08
70.08 CLOSE
CLOSE push-button
push-button
70.24
70.24 Motor
Motor limit
limit switch
switch
70.09
70.09 Closing
Closing shaft
shaft
70.25
70.25 Closing
Closing spring
spring
70.10
70.10 Cam
Cam disc
disc
70.26
70.26 Closing
Closing chain
chain
70.11
70.11 Roller
Roller lever
lever
70.31
70.31 Spring
Spring position
position indicator
indicator
70.12
70.12 Main
Main shaft
shaft
70.52
70.52 Cicuit
Cicuit breaker
breaker position
position indicator
indicator
70.13 Manual
70.13 Manual TRIP
TRIP release
release
70.53 Hand
70.53 Hand crank
crank
70.14
70.14 TRIP
TRIP push-button
push-button
71.32
71.32 Pair
Pair of
of winding
winding lever
lever with
with return
return stop
stop
70.15
70.15 Trip
Trip magnet
magnet
71.35
71.35 Cam
Cam disc
disc for
for eccentric
eccentric gear
gear
70.16
70.16 Trip
Trip latch
latch
71.42
71.42 Chain
Chain wheel
wheel
70.17
70.17 Trip
Trip dashpot
dashpot
71.43
71.43 Crank
Crank lever
lever
70.18
70.18 Operating
Operating lever
lever
71.44
71.44 Support
Support pin
pin
70.19
70.19 Trip
Trip chain
chain
79.04
79.04 Gearing
Gearing
70.19
70.19
70.52
70.52
70.18
70.18
70.12
70.12
70.17
70.17
70.15
70.15
70.14
70.14
70.16
70.16
70.13
70.13
70.11
70.11
Summary of Contents for FKG1X
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