Ormazabal ekor.rps, Общее руководство по инструкции

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IG-150-EN version 04; 03/10/16
94
Protection functions. Description and settings General instructions
ekor.rps
Directional Locking
Pilot protection instantaneous trip with activation of zone 2,
if RTP signal is not received, once the locking time is elapsed
and no fault is seen in zone 3 Z3(R)MEM.
ETP locking signal is sent if the fault is seen backwards Z3(R)
MEM.
The channel stop signal (STOP) is activated if a fault is
detected forwards (Z1, Z2 or Z3) without seeing a fault in
zone 3 Z3(R)MEM.
The logic diagram is shown below:
Figure 4.27.
Directional Locking
Directional Unlocking
Pilot protection instantaneous trip with activation of Z2, if
the unlocking signal (RTP) is received or if only the channel
loss signal (RPSG) is received during the guard signal loss
time (TPSG). Since the moment in which the guard channel
loss signal is activated a 150 ms time span is opened during
which the trip can be given if the RPGS signal is activated
during the programmed time (TPSG) without RTP reception.
After these 150 ms the guard channel loss signal will have
no effect over the pilot protection trip. Therefore, it is
indispensable that the time TPSG is programmed to a value
lower than 150 ms so that the loss signal guard activates
the trip. Once the guard signal is recovered 200 ms will be
waited before starting again the aforementioned logic in
case the guard channel is lost again.
The ETP output is the same as in the POTT scheme. The
Z3(R)MEM signal can be eliminated from the logic only by
disabling the “Inverse direction locking” function. In this case
the Z3(R)MEM would be continuously as 0.