Functions
2.13 Dir. Intermittent earth fault protection
SIPROTEC, 7SK80, Manual
E50417-G1140-C344-A5, Release date 11.2012
217
not relevant from the protection perspective, because during an intermittent fault many ignition pulses occur
and the counter threshold is certainly reached.
At address 3404 Monitoring time you set the monitoring time after detection of the direction pulse in the
direction parameterized at 3402. If the time has expired before the number set at 3403 No. of pulses has
been reached, the associated counter is reset. This time is a criterion for the disappearing of the intermittent
fault.
At address 3406 Pickup you can set the criterion for the pickup of the function. For with Vgnd/3V0> pickup
takes place as soon as the threshold Vgnd> / 3V0> has been exceeded, regardless of whether a real inter-
mittent ground fault is present or not. For with oper. dir., recording starts when a direction pulse in the
direction parameterized at 3402 has been detected.
2.13.3 Settings
2.13.4 Information List
Addr. Parameter Setting Options Default Setting Comments
3401 Dir. Interm. EF OFF
ON
ON with GF log
Alarm Only
OFF Dir. Intermittent earth fault protec-
tion
3402 Direction Forward
Reverse
Forward Direction to be protected
3403 No. of pulses 2 .. 50 5 Pulse no. for detecting the interm.
E/F
3404 Monitoring time 0.04 .. 10.00 sec 2.00 sec Monitoring time after pickup de-
tected
3405 Vgnd> / 3V0> 2.0 .. 100.0 V 20.0 V Vgnd> measured / 3V0> calculat-
ed
3406 Pickup with Vgnd/3V0>
with oper. dir.
with Vgnd/3V0> Pickup of the function
No. Information Type of In-
formation
Comments
6951 >dIEF block SP >Block directional interm. E/F prot.
6961 dIEF OFF OUT Dir. Interm. E/F prot. is switched off
6962 dIEF blocked OUT Dir. Interm. E/F prot. is blocked
6963 dIEF active OUT Dir. Interm. E/F prot. is active
6972 dIEF pick up OUT dIEF: pick up
6973 dIEF TRIP OUT dIEF: Trip
6974 No.forward= VI dIEF: No. of detected forward pulses =
6975 No.reverse= VI dIEF: No. of detected reverse pulses =
6976 No.undef.= VI dIEF: No. of detected undefined pulses =
6979 dIEF ALARM OUT dIEF: Alarm
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