D-500L Firmware V-5.8
K35D03-EN - 108 -
The unit offers full control for any brand and model of motorized circuit breakers (MCB).
The MCB control is performed through 3 digital output functions, namely Open, Close and Undervoltage
coil controls. Only 2 of these outputs are used in a single application.
Any digital output can be assigned to MCB control signals through programming menu.
The MCB CLOSE sequence is below:
Activate UV output, wait for undervoltage coil timer (t
uv
)
Activate CLOSE output, wait for close pulse timer (t
cl
)
Deactivate CLOSE output
The MCB OPEN sequence is below:
Deactivate UV output
Activate OPEN output, wait for open pulse timer (t
op
)
Deactivate OPEN output
If MCB feedback input is defined and the MCB fails to
change position after the expiration of MCB Fail timer,
then a fault condition will occur.
Open Pulse, Close Pulse and Undervoltage Coil timers
are adjusted through programming menu.
19. MOTORIZED CIRCUIT BREAKER CONTROL
