Alstom FKG1X - Page 63

Function descriptionFunction description
FK 3-12 spring operating mechanismsFK 3-12 spring operating mechanisms
For circuit For circuit
breabrea
kerskers
06.04.201106.04.2011
48-020-212EN0248-020-212EN02
4/154/15
Energy storeEnergy store
••
Closing spring Closing spring
70.25 stores energy 70.25 stores energy
to close to close
the circuit the circuit
breaker and tobreaker and to
charge trip spring 70.20. Surplus energy ensures that the circuit breakercharge trip spring 70.20. Surplus energy ensures that the circuit breaker
can be safely closed in all situations.can be safely closed in all situations.
••
Trip spring 70.20 Trip spring 70.20
furnishes the energy necessafurnishes the energy necessa
ry to trip the ry to trip the
circuitcircuit
breaker. The trip spring may be in the operating mechanism or in thebreaker. The trip spring may be in the operating mechanism or in the
circuit breaker, depending on the circuit breaker design.circuit breaker, depending on the circuit breaker design.
Energy storeEnergy store
ChaCha
rging rging
mechamecha
nismnism
••
Motor 70.01 Motor 70.01
and gearing and gearing
79.04 serve 79.04 serve
to charge to charge
closing spring closing spring
70.2570.25
Closing unitClosing unit
••
On cloOn clo
sing, the sing, the
energy energy
of of
closing spclosing sp
ring 70.25 ring 70.25
is is
transmitted to transmitted to
camcam
disk 70.10 via closing chain 70.26, crank lever 71.43 and closing shaftdisk 70.10 via closing chain 70.26, crank lever 71.43 and closing shaft
70.09. The cam disc 70.09. The cam disc
drives main shaft 70.12 via drives main shaft 70.12 via
roller lever roller lever
70.11. The70.11. The
circuit breaker is closed and trip spring 70.20 charged via drive levercircuit breaker is closed and trip spring 70.20 charged via drive lever
70.18 and the linkage70.18 and the linkage
••
Cam disc Cam disc
70.10 controls t70.10 controls t
he travel/time he travel/time
characteristic of characteristic of
the main the main
con-con-
tact during closing.tact during closing.
Tripping unitTripping unit
••
If trip If trip
spring 70.20 is spring 70.20 is
mounted in mounted in
the operating mthe operating m
echanism, its echanism, its
energy isenergy is
transmitted to the transmitted to the
circuit breaker via circuit breaker via
trip chain 70.19, trip chain 70.19,
main shaft main shaft
70.1270.12
and drive lever 70.18.and drive lever 70.18.
••
The mThe m
otion is otion is
retarde by retarde by
trip dashpot trip dashpot
70.17 at 70.17 at
the end the end
of the of the
trippingtripping
process.process.
LatchesLatches
••
When closing When closing
spring 70.25 spring 70.25
is charged, is charged,
closing latch closing latch
70.05 supports it70.05 supports it
through crank lever 71.43 and support pin 71.44.through crank lever 71.43 and support pin 71.44.
••
When trip spring When trip spring
70.20 is c70.20 is c
harged, trip latch harged, trip latch
70.16 supports it 70.16 supports it
by theby the
lever arm of lever arm of
roller lever 70.11 and roller lever 70.11 and
main shaft main shaft
70.12.70.12.
Release deviceRelease device
••
Closing Closing
magnet magnet
70.06 70.06
releases releases
closing closing
latch latch
70.05.70.05.
••
Trip Trip
magnet magnet
70.15 70.15
releases releases
trip trip
latch latch
70.16.70.16.