Auto-recloser sequence from Start with two shots (both fail).
In this auto-recloser scheme, the START signal from the non-directional overcurrent protection function
(I> START) was set up as the operation starter for Request 1 (REQ1). REQ1 has two shots (Shots 1
and 2) enabled with the setting detailed in the image below; the first one is a high-speed shot (0.2
s) that is then followed by a time-delayed shot (120 s). In this scheme the starting delay time is longer
that in REQ2's high-speed shot. The shot action time is also longer in REQ1. If the fault persists after
both shots, the time determining how long the breaker stays closed is reduced.
Figure. 5.4.4 - 97. Settings for I> with two shots.
When the START signal is used to initiate the auto-recloser sequence, the fault duration timings are
overseen by the auto-recloser function and thus both the starting time and the arcing time need to be
set accordingly. The protection's main operating time settings should be longer than the values set to
the auto-recloser function; this way the state changes work properly with this function.
Figure. 5.4.4 - 98. Signal status graph of the 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 even though 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.
A
AQ
Q-S215
-S215
Instruction manual
Version: 2.04
148
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...