121
Trip logic (TR)
&KDSWHU
9HULI\LQJVHWWLQJVE\VHFRQGDU\
LQMHFWLRQ
7ULSORJLF75
Prepare the terminal for verification of settings as outlined in section “Preparing for
test” in this chapter.
The function is tested functionally together with other protection functions (distance
protection ZMn--, line differential protection DIFL-, earth-fault overcurrent protection
IOC-- or TOC--, etc.) within the REx 5xx terminals. It is recommended to test the func-
tion together with the autoreclosing function, when built into the terminal or when a
separate external unit is used for the reclosing purposes.
SKRSHUDWLQJPRGH
The function must issue a three-phase trip in all cases, when trip is initiated by any pro-
tection or some other built-in or external function. The following functional output sig-
nals must always appear simultaneously: TRIP-TRIP, TRIP-TRL1, TRIP-TRL2, TRIP-
TRL3 and TRIP-TR3P.
SKSKRSHUDWLQJPRGH
The following tests should be carried out in addition to some other tests, which depends
on the complete configuration of a terminal:
3URFHGXUH
,QLWLDWHRQHE\RQHGLIIHUHQWVLQJOHSKDVHWRHDUWKIDXOWV
Consider sufficient time interval between the faults, to overcome a
reclaim time of eventually activated autoreclosing function. Only
a single-phase trip should occur for each separate fault and only
one of the trip outputs (TRIP-TRLn) should be activated at a time.
Functional outputs TRIP-TRIP and TRIP-TR1P should be active
at each fault. No other outputs should be active.
,QLWLDWHGLIIHUHQWSKDVHWRSKDVHDQGWKUHHSKDVHIDXOWV
Consider sufficient time interval between the faults, to overcome a
reclaim time of eventually activated autoreclosing function. Only
a three-phase trip should occur for each separate fault and all of the
trip outputs (TRIP-TRLn) should be activated at a time. Functional
outputs TRIP-TRIP and TRIP-TR3P should be active at each fault.
No other outputs should be active.
Summary of Contents for REL 551 2.3 Series
Page 16: ...10 Note signs KDSWHU 6DIHW LQIRUPDWLRQ ...
Page 44: ...38 Checking the binary I O circuits KDSWHU KHFNLQJ WKH H WHUQDO FLUFXLWU ...
Page 52: ...46 Checking the self supervision signals KDSWHU QHUJLVLQJ WKH WHUPLQDO ...
Page 140: ...134 Testing the interaction of the distance protection KDSWHU 7HVWLQJ WKH SURWHFWLRQ V VWHP ...