Siemens siprotec SJ62 User Manual page 226

SIPROTEC 4, 7SJ62/63/64 Handbuch
C53000-G1140-C147-A, Edition 07.2015
Table 2-14 shows all messages subject to a restraint mechanism avoiding a message
burst during an intermittent ground fault:
Table 2-14 Buffered Messages
FNo.
1761 „50(N)/51(N) PU"
1762 „50/51 Ph A PU"
1763 „50/51 Ph B PU"
1764 „50/51 Ph C PU"
1810 „50-1 picked up"
1820 „51 picked up"
1765 „50N/51NPickedup"
1831 „50N-2 picked up"
1834 „50N-1 picked up"
1837 „51N picked up"
2691 „67/67N pickedup"
2660 „67-1 picked up"
2670 „67-TOC pickedup"
2692 „67 A picked up"
2693 „67 B picked up"
2694 „67 C picked up"
2646 „67N-2 picked up"
2681 „67N-1 picked up"
2684 „67N-TOCPickedup"
2695 „67N picked up"
5159 „46-2 picked up"
5165 „46-1 picked up"
5166 „46-TOC pickedup"
1215 „64 Pickup"
1221 „50Ns-2 Pickup"
1224 „50Ns-1 Pickup"
1227 „51Ns Pickup"
6823 „START-SUP pu"
Before they are entered in the fault log (event buffer) and transmitted to the system
interface or CFC, the messages of table 2-14 are buffered (starting with the first pickup
message received after „Intermitt.EF" was signalled). The buffering does not
apply for signalling to relays and LEDs as it is required by time-graded protection
systems for reverse interlocking. The intermediate buffer can store a maximum of two
status changes (the most recent ones) for each message.
Buffered messages are signalled to the fault log, CFC and to the system interface with
the original time flag only when a TRIP command is initiated by a protective function
other than the intermittent ground fault protection. This ascertains that a pickup, al-
though delayed, is always signalled in association with each TRIP command.
2.13 Intermittent Ground Fault Protection
Message
50(N)/51(N) picked up
50/51 Phase A picked up
50/51 Phase B picked up
50/51 Phase C picked up
50-1 picked up
51 picked up
50N/51N picked up
50N-2 picked up
50N-1 picked up
51N picked up
67/67N picked up
67-1 picked up
67-TOC picked up
67/67-TOC Phase A picked up
67/67-TOC Phase B picked up
67/67-TOC Phase C picked up
67N-2 picked up
67N-1 picked up
67N-TOC picked up
67N/67N—TOC picked up
46-2 picked up
46-1 picked up
46-TOC picked up
64 displacement voltage pick up
50Ns-2 picked up
50Ns-1 picked up
51Ns picked up
Startup supervision Pickup
Explanation
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