Description
16/214 Revision 11 • INSTALLATION AND OPERATING INSTRUCTIONS • 8DA10 • 861-9601.9
7 Circuit-breaker
7.1 Design
The vacuum circuit-breaker consists of the following components:
• Operating mechanism with stored-energy spring mechanism and control elements (3AH49)
• Operating linkage for contact operation
• 3 switchpanel poles with vacuum interrupters
Vacuum interrupters
7.2 Circuit-breaker operating mechanism
Design The circuit-breaker operating mechanism is closed by a front cover. The front cover contains
openings for control elements and indicators. All components required for operating the
circuit-breaker are accommodated in the operating mechanism housing.
Fig. 4: Sectional view of
a vacuum interrupter
①
Moving contact
②
Metal bellows
③
Fixed contact
Fig. 5: Circuit-breaker operating mechanism without front cover
①
Auxiliary switch (-S1)
②
ON pushbutton
③
Closing solenoid (-Y9)
④
1st shunt release (-Y1)
⑤
Undervoltage release (-Y7)
⑥
OFF pushbutton
⑦
Opening spring
⑧
Operating shaft for circuit-breaker
⑨
Operations counter
⑩
Position indicator for circuit-breaker
⑪
"Spring charged" indicator
⑫
Position switch
⑬
Closing spring
⑭
Actuating opening for "spring charging"
(circuit-breaker)
⑮
Rating plate
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