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Functions
2.28 90-%-Stator Earth Fault Protection (ANSI 59N, 64G, 67G)
For a protected zone of 90 %, the protection should already operate at 1/10 of the full displacement voltage,
whereby only 1/10 of the earth fault current is generated:
In this example 3I0> is set to 11 mA. For the displacement voltage setting, 1/10 of the full displacement voltage
is used (because of the 90% protected zone). Considering a 500 V/100 V voltage divider, this results in:
Setting value U0> = 10 V
The time delay must lie below the 50 A capacity time of the loading resistor, i.e. below 20 s. The overload ca-
pacity of the earthing transformer must also be considered if it lies below that of the loading resistor.
2.28.3
Settings
Addr.
Parameter
5001
S/E/F PROT.
5002
U0>
5003
3I0>
5004
DIR. ANGLE
5005
T S/E/F
2.28.4
Information List
No.
Information
5173
>S/E/F BLOCK
5176
>S/E/F IEE off
5181
S/E/F OFF
5182
S/E/F BLOCKED
5183
S/E/F ACTIVE
5186
U0> picked up
5187
U0> TRIP
5188
3I0> picked up
5189
Uearth L1
5190
Uearth L2
5191
Uearth L3
5193
S/E/F TRIP
5194
SEF Dir Forward
210
Setting Options
OFF
ON
Block relay
2.0 .. 125.0 V
2 .. 1000 mA
0 .. 360 °
0.00 .. 60.00 sec; ∞
Type of In-
formation
SP
>BLOCK stator earth fault protection
SP
>Switch off earth current detec.(S/E/F)
OUT
Stator earth fault prot. is switch OFF
OUT
Stator earth fault protection is BLOCK.
OUT
Stator earth fault protection is ACTIVE
OUT
Stator earth fault: U0 picked up
OUT
Stator earth fault: U0 stage TRIP
OUT
Stator earth fault: I0 picked up
OUT
Earth fault in phase L1
OUT
Earth fault in phase L2
OUT
Earth fault in phase L3
OUT
Stator earth fault protection TRIP
OUT
Stator earth fault: direction forward
Default Setting
OFF
Stator Earth Fault Protection
10.0 V
U0> Pickup
5 mA
3I0> Pickup
15 °
Angle for Direction Determination
0.30 sec
T S/E/F Time Delay
Comments
C53000-G1176-C149-7, Release date 03.2010
Comments
SIPROTEC, 7UM62, Manual
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