
OR
0-tSecurity
0
1
CR
CR_GUARD
CRL
ANSI11000253-1-en.vsd
ANSI11000253 V1 EN
Figure 233:
Guard singal logic with unblocking scheme and with setting Unblock =
NoRestart
The unblocking function can be set in three operation modes (setting
Unblock
):
Disabled
The unblocking function is out of operation
No restart
Communication failure shorter than
tSecurity will be ignored
If CR_GUARD disappears a CRL signal will be transferred to the trip logic allowing a
forward overreaching trip
There will not be any information in case of communication failure (LCG)
Restart
Communication failure shorter than
tSecurity will be ignored
It sends a defined (150 ms) CRL after the disappearance of the CR_GUARD signal to
the trip logic allowing a forward overreaching trip for 150 ms.
The function will activate LCG output in case of communication failure
If the communication failure comes and goes (<200 ms) there will not be recurrent
signalling
12.1.6.6
Intertrip scheme
In the direct intertrip scheme, also known as direct underreaching transfer trip, the send
signal CS is sent from an underreaching zone that is tripping the line.
The received signal CR is directly transferred to a TRIP for tripping without local criteria.
The signal is further processed in the tripping logic.
1MRK 506 335-UUS A
Section 12
Scheme communication
501
Technical manual
Содержание REL650 series
Страница 1: ...Relion 650 series Line distance protection REL650 ANSI Technical manual ...
Страница 2: ......
Страница 42: ...36 ...
Страница 48: ...42 ...
Страница 58: ...52 ...
Страница 68: ...62 ...
Страница 74: ...68 ...
Страница 194: ...188 ...
Страница 534: ...528 ...
Страница 580: ...574 ...
Страница 722: ...716 ...
Страница 792: ...786 ...
Страница 855: ...849 ...