21
Figure 13: Magnetic-actuator controller flow diagram (continued)
Part 3: CLOSE command using local pushbutton or external command
CLOSE
command.
Verification:
Command duration >10 ms.*
Current actuator position is OPEN.
Check of capacitor voltage.
Switch on the coil to pull the anchor in
upper position until the CLOSED position
is reached. Automatically removed if
CLOSED position is not reached with
100 ms.
The anchor moves up, rotating the jack
shaft via the coupling rod. The circuit
breaker closes, compressing the contact
pressure springs and the opening spring.
The permanent magnet maintains the
CLOSED position. Upon closing, the yellow
LED is illuminated, followed by the green
LED when capacitors are fully charged.
The yellow LED is off when the green LED
lights.
Mis-operation: if CLOSED position is not
reached within 100 ms, the red LED
illuminates to indicate an error. A self-test
of electronics, coil and capacitors is
initiated. If no fault is detected, the
system is ready for closing when green
LED is illuminated.
CLOSED position is reached
within 100 ms.
CLOSED position is not reached
within 100 ms.
Part 4: OPEN command using local pushbutton or external command
OPEN
command.
Verification:
Command duration >10 ms.*
Current actuator position is CLOSED.
Check of capacitor voltage.
Circuit breaker opens due to stored energy
in contact pressure springs and opening
spring, moving the magnetic-actuator
anchor to the lower position. The opening
spring maintains the anchor in this
position.
Mis-operation: if OPEN position is not
reached within 100 ms, the red LED
illuminates to indicate an error. A self-test
of electronics, coil and capacitors is
initiated. If no fault is detected, the
system is ready for opening when green
LED is illuminated.
OPEN position is reached
within 100 ms.
OPEN position is not reached
within 100 ms.
If control voltage has been missing for
300 s or more, electrical opening is not
possible; circuit breaker can be opened
using manual opening lever.
Switch on the coil for compensation of the
permanent magnetic field until the OPEN
position is reached. Automatically
removed if OPEN position is not reached
with 100 ms.
* 10 ms for dc power (20 ms for ac power) to close and trip command terminals.
