ABB Relion REC615, Техническое руководство

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Output signal Operation description Operation type
If both CB1 and CB2 are open,
bus 1 is faulty and bus 2 is
healthy,
CLOSE_CB2
is acti-
vated after Close CB2 delay
has expired.
Activation of
BLOCK
input deactivates the outputs and resets the timers.
In progress logic
Automatic operation ongoing is signalled outside to output
INPRO
. The
INPRO
output is set TRUE if an undervoltage is detected on the active bus or if an
auto reconnection is initialized. INPRO is reset when an auto transfer or an auto
reconnection is completed or if the fault is cleared during the waiting time.
Auto blocking alarm logic
Blocking alarm for auto switching is signalled outside to output
BLKD_AL
. Blocking
alarm is TRUE for various reasons.
•
BLOCK
input is active
• CB1 is closed and under-voltage detected on bus 2
• CB2 is closed and under-voltage detected on bus 1
• Undervoltage detected on both bus 1 and bus 2
Figure 352: Sub module diagram for auto blocking alarm logic
1MRS758755 C Control functions
REC615 & RER615
Technical Manual
695