Motor operating mechanism
8DJH Operating voltages for motor operating mechanisms
• 24, 48, 60, 110, 220 V DC
• 110 and 230 V AC, 50 /60 Hz.
Further values on request.
Motor rating for circuit-breaker operating mechanism type 1.1 at
DC: maximum 100 W
AC: maximum 250 VA.
Motor rating for disconnector operating mechanism and circuit-breaker operating mechanism type 2 at
DC: maximum 80 W
AC: maximum 80 VA.
8DJH Secondary components
The scope of the secondary equipment of the vacuum cir cuit-breaker depends on the type of application and offers a wide range of possible variations, allowing almost every requirement to be satisfi ed.
Closing solenoid
• For electrical closing.
Shunt release
• Magnet coil for tripping by protection device or electrical actuation.
C.t.-operated release
• For tripping pulse 0.1 Ws in conjunction with suitable protection systems, e.g. protection system 7SJ45 or make Woodward/SEG type WIC; other designs on request
• Used if external auxiliary voltage is missing, tripping via protection relay.
Low-energy magnetic release
• For tripping pulse 0.02 Ws, tripping via transformer monitor (IKI-30).
Undervoltage release
• Comprising:
– Energy store and unlatching mechanism
– Electromagnetic system, which is permanently connected to voltage while the vacuum circuit-breaker is closed; tripping is initiated when this voltage drops.
Anti-pumping
(mechanical and electrical)
•
8DJH Function: If constant CLOSE and OPEN commands are present at the vacuum circuit-breaker at the same time, the vacuum circuit-breaker will return to the open position after closing. It remains in this position until a new CLOSE command is given. In this manner, continuous closing and opening (= pumping) is avoided.
Circuit-breaker tripping signal
• For electrical signaling (as pulse > 10 ms), e.g. to remote control systems, in the case of automatic tripping (e.g. protection)
• Via limit switch and cutout switch.
Varistor module
• To limit overvoltages to approx. 500 V for protection devices (when inductive components are mounted in the vacuum circuit-breaker)
• For auxiliary voltages ≥ 60 V DC.
8DJH Auxiliary switch
• For electrical position indication.
Position switch
• For signaling “closing spring charged”.
Mechanical interlocking
• Dependent on the type of operating mechanism
• Interrogation of the three-position disconnector from the switchgear side
• Option: Operating mechanism with mechanical interlocking as – Stored-energy mechanism with closing solenoid and pushbutton: The pushbutton operated by the mechanical interlocking prevents a continuous command to the closing solenoid
• During
8DJH operation of the three-position disconnector from CLOSED to OPEN, the vacuum circuit-breaker cannot be closed.
Operations counter
• As numeric indicator, 5 digits, mechanical.
