Application And Setting Notes; Settings - Siemens SIPROTEC 5 Manual

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Threshold
The Threshold parameter is the lower limit of the operating range of the Current-sum supervision func-
tion.
Delay failure indication
When the calculated fault current (I
indication (parameter: Delay failure indication) starts. If the threshold-value violation persists for
that time, the Failure indication is generated.
Blocking the Function
The following blockings reset the picked up function completely:
•
Externally or internally via the binary input signal
•
A protection pickup
The pickup signal of a protection function blocks the indication
8.3.7.4

Application and Setting Notes

Parameter: Slope factor
•
Recommended setting value (_:101) Slope factor = 0.1
The Slope factor parameter is used to set the ratio between the minimum (I
phase current. This function calculates the RMS values.
Parameter: Threshold
•
Recommended setting value (_:102) Threshold = 0.1 A for I
The Threshold parameter is used to set the maximum phase current (I
Parameter: Delay failure indication
•
Recommended setting value (_:6) Delay failure indication = 5.00 s
Set the Delay failure indication parameter so that overfunctions due to disturbing influences (such as
switching operations) are avoided.
8.3.7.5

Settings

Addr.
Supv. sum I
_:1
_:102
_:101
SIPROTEC 5, Fault Recorder, Manual
C53000-G5040-C018-5, Edition 11.2017
) exceeds the calculated fault current limit (I
F
Parameter C
Supv. sum I:Mode
Supv. sum I:Threshold 1 A @ 100 Irated 0.030 A to 10.000 A
5 A @ 100 Irated 0.15 A to 50.00 A
1 A @ 50 Irated
5 A @ 50 Irated
1 A @ 1.6 Irated
5 A @ 1.6 Irated
Supv. sum I:Slope factor
8.3 Supervision of the Secondary System
Fmax
>Block function
Failure .
min
= 1 A or 0.5 A for I
rated
).
max
Setting Options
•
off
•
on
•
test
0.030 A to 10.000 A
0.15 A to 50.00 A
0.001 A to 1.600 A
0.005 A to 8.000 A
0.00 to 0.95
Supervision Functions
), the delay of the failure
) and the maximum (I )
max
= 5 A
rated
Default Setting
off
0.100 A
0.50 A
0.100 A
0.50 A
0.100 A
0.500 A
0.10
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