Theory Of Operation - ABB REC 561 User Manual

1MRK 580 170-XEN
Page 5 - 58
Line
protection
Operate time
Closed
Circuit
breaker
Open
Auto-reclosing
function

2 Theory of operation

Auto-reclosing - Single- and/or
three-phase
Break time
Fault duration AR open time for breaker
Set AR open time
Fig. 1 Single-shot auto-reclosing at a permanent fault
The auto-reclosing function first co-operates with the line protection func-
tions, the trip function, the circuit-breaker and the synchro-check func-
tion. It can also be influenced by other protection functions such as shunt
reactor protection through binary input signals, AR On/Off manual con-
trol. It can provide information to the disturbance and service report func-
tions, event recording, indications, and reclosing operation counters.
The reclosing counters can be read and reset on the built-in MMI:
Service Report
ARCounters
The auto-reclosing is a purely logical function that works with logical or
binary signals, logical operations, and timers.
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Operate time
Closing time
Break time
Fault duration
Reclaim time
Version 1.0-00
(X80170-1)