Figure. 5.4.4 - 100. Signal status graph of the semi-permanent overcurrent auto-recloser cycle.
1. An overcurrent is found in the protected line causing the I> protection to pick up. This
activates the AR1 R
AR1 Request
equested
ed signal to begin to calculate the SSho
hot1 Star
t1 Start T
t Time
ime. This activates
the SSho
hot 1 Running
t 1 Running signal eventhough the auto-recloser function is not yet running.
2. The SSho
hot1 Star
t1 Start T
t Time
ime (500 ms) for has elapsed and the auto-recloser function starts running
(AR Running
AR Running). This sends an "Open" command to the breaker.
3. The circuit breaker is opened and the I> stage's START signal is released and simultaneously
REQ1 trip signal for auto-reclosing is released. The auto-recloser function starts calculating
the SSho
hot1 Dead T
t1 Dead Time
ime to close the breaker.
4. The SSho
hot1 Dead T
t1 Dead Time
ime (200 ms) is exceeded and the auto-recloser function sends a "Close"
request to the object breaker: the conditions are met and the breaker's "Close" command is
sent to the breaker's close coil.
5. The circuit breaker is closed and since fault was not cleared, a new pick-up of I> is detected.
A "Close" command is dropped after the breaker's "Closed" indication is received and the
auto-recloser function starts calculating the SSho
hot1 R
t1 Reclaim
eclaim TTime
ime simultaneously with the
SSho
hot1 Ar
t1 Arcing T
cing Time
ime.
6. The SSho
hot1 Ar
t1 Arcing T
cing Time
ime (200 ms) is exceeded which means that the fault is not cleared and
the function sends an "Open" command to the breaker. The function deactivates the SSho
hot1
t1
Running
Running signal and instead activates the SSho
hot2 Running
t2 Running signal.
7. The circuit breaker opens and the SSho
hot2 Dead T
t2 Dead Time
ime calculation begins.
8. The fault is cleared during the SSho
hot2 Dead T
t2 Dead Time
ime (120 s). When that time is exceeded, the
auto-recloser function sends a "Close" command to the breaker.
9. The circuit breaker is closed and since the fault was cleared by Shot 2, no more pick-ups are
detected. The "Close" command is dropped after the the breaker's "Closed" indication is
received. The auto-recloser function also starts calculating the SSho
hot2 R
t2 Reclaim T
eclaim Time
ime.
A
AQ
Q-S215
-S215
Instruction manual
Version: 2.04
150
Summary of Contents for AQ-S215
Page 1: ...AQ S215 Bay control IED Instruction manual...
Page 249: ...Figure 7 4 151 Example block scheme A AQ Q S215 S215 Instruction manual Version 2 04 248...
Page 269: ...Figure 8 13 172 Device installation A AQ Q S215 S215 Instruction manual Version 2 04 268...
Page 287: ...10 Ordering information A AQ Q S215 S215 Instruction manual Version 2 04 286...
