Functions
2.28 90-%-Stator Earth Fault Protection (ANSI 59N, 64G, 67G)
SIPROTEC, 7UM62, Manual
C53000-G1176-C149-7, Release date 03.2010
210
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
2.28.4 Information List
Addr. Parameter Setting Options Default Setting Comments
5001 S/E/F PROT. OFF
ON
Block relay
OFF Stator Earth Fault Protection
5002 U0> 2.0 .. 125.0 V 10.0 V U0> Pickup
5003 3I0> 2 .. 1000 mA 5 mA 3I0> Pickup
5004 DIR. ANGLE 0 .. 360 ° 15 ° Angle for Direction Determination
5005 T S/E/F 0.00 .. 60.00 sec; ∞ 0.30 sec T S/E/F Time Delay
No. Information Type of In-
formation
Comments
5173 >S/E/F BLOCK SP >BLOCK stator earth fault protection
5176 >S/E/F IEE off SP >Switch off earth current detec.(S/E/F)
5181 S/E/F OFF OUT Stator earth fault prot. is switch OFF
5182 S/E/F BLOCKED OUT Stator earth fault protection is BLOCK.
5183 S/E/F ACTIVE OUT Stator earth fault protection is ACTIVE
5186 U0> picked up OUT Stator earth fault: U0 picked up
5187 U0> TRIP OUT Stator earth fault: U0 stage TRIP
5188 3I0> picked up OUT Stator earth fault: I0 picked up
5189 Uearth L1 OUT Earth fault in phase L1
5190 Uearth L2 OUT Earth fault in phase L2
5191 Uearth L3 OUT Earth fault in phase L3
5193 S/E/F TRIP OUT Stator earth fault protection TRIP
5194 SEF Dir Forward OUT Stator earth fault: direction forward
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