864-5091.9 • INSTALLATION AND OPERATING INSTRUCTIONS • 8DB10 • Revision 06 23/214
Description
9.2 Operating mechanism box
Design The operating mechanism box is closed with a front plate. The front plate contains openings
for the control elements and indicators. The operating mechanism box accommodates all
components required to operate the circuit-breaker.
Function Depending on its design, the circuit-breaker is closed electrically or mechanically with the ON
pushbutton. The operating power is transmitted to the vacuum interrupters through an
operating linkage. The closing spring is immediately recharged by the motor after closing.
If the motor supply voltage fails, the closing spring can be charged manually. To do this, there
is an opening in the removable front plate with the hand crank coupling of the gear behind.
The charging condition of the spring can be read on the indicator.
9.3 Equipment
Basic equipment The basic version of the vacuum circuit-breaker is equipped as follows:
• Electrical operating mechanism (charging motor) with mechanical and electrical anti-
pumping device (M1)
• Closing solenoid (Y9)
• 1st shunt release (Y1)
• Low-voltage plug connector with 10-pole wiring (Q0)
• Auxiliary switch, max. 2NO + 2NC + 2 changeover freely available (S1)
• Position switch for "closing spring charged" indication (S41, S42)
• Circuit-breaker tripping signal, cutout switches (S6, S7)
•Operations counter
• Feeder locking device
Additional equipment • Extended auxiliary switch, max. 12NO + 12NC + 2 changeover freely available (S1)
• Shunt release (Y2)
• Undervoltage release (Y7)
• Interlocking between feeder locking device and three-position disconnector (circuit-breaker
only lockable in earthed position)
Possible release
combinations
Fig. 6: Circuit-breaker operating mechanism without front plate
①
Auxiliary switch (-S1)
②
ON pushbutton
③
Closing solenoid (-Y9)
④
1st shunt release (-Y1)
⑤
OFF pushbutton
⑥
Undervoltage release (-Y7)
⑦
Operating shaft for circuit-breaker
⑧
Opening spring
⑨
Operations counter
⑩
Position indicator for circuit-breaker
⑪
"Closing spring charged / not charged" indicator
⑫
Position switch
⑬
Closing spring
⑭
Gear with hand crank coupling
⑮
Rating plate
Release Type Release combination
1234
1st shunt release 3AY15 10 X X X X
2nd shunt release 3AX1101 - - - X - - - X
Undervoltage release 3AX1103 - - - - - - X X
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