Alstom FKG1X, Instruction Manual

Page: 74 / 274

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
15/15 15/15
• •
Trip latch Trip latch 70.16 is released 70.16 is released by the electrical by the electrical command to command to trip magnet trip magnet
70.15 or by actuation of mechanical manual release 70.13. Main shaft 70.15 or by actuation of mechanical manual release 70.13. Main shaft
70.12 and the circuit breaker, which is coupled to it, are accelerated in
70.12 and the circuit breaker, which is coupled to it, are accelerated in
the O direction by charged trip spring 70.20, Trip dashpot 70.17 comes
the O direction by charged trip spring 70.20, Trip dashpot 70.17 comes
into action toward the end of the tripping process, slowing the moving
into action toward the end of the tripping process, slowing the moving
masses of the circuit breaker and operating mechanism to a stop
masses of the circuit breaker and operating mechanism to a stop
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Control, indicating Control, indicating and interlock and interlock functions at functions at the end the end of the o of the opening pening
movement: movement:
− −
Auxiliary switch Auxiliary switch 70.21 Which i 70.21 Which is coupled s coupled to main to main shaft 70.12 has shaft 70.12 has bro- bro-
ken the opening release coil circuit and made the closing circuit. ken the opening release coil circuit and made the closing circuit.
Thus any further electrical actuation of the opening release coil is
Thus any further electrical actuation of the opening release coil is
prevented; an electrical closing operation is again possible.
prevented; an electrical closing operation is again possible.
− −
A lever A lever (not shown) controlled (not shown) controlled by main by main shaft 70.12 has shaft 70.12 has again en- again en-
abled closing latch 70.05 for a subsequent closing operation. The abled closing latch 70.05 for a subsequent closing operation. The
circuit breaker can be closed mechanically.
circuit breaker can be closed mechanically.
− −
Circuit breaker Circuit breaker position indicator position indicator 70.52 has 70.52 has been turned been turned to the to the O po- O po-
sition with the main shaft. sition with the main shaft.
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Circuit breaker Circuit breaker and operating and operating mechanism mechanism are in are in operating state operating state 2 2
Operating state Operating state 2: steady 2: steady
Motor Closing Motor Closing Opening Opening
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The The circuit circuit breaker i breaker is s ready ready for for closing. closing.