2 Functions
134
7UM61 Manual
C53000-G1176-C127-3
Referred to the 6.3 kV side, this results in
The secondary current of the toroidal transformer supplies to the input of the device
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 capacity of the earthing transformer must also be considered if it
lies below that of the loading resistor.
2.21.3 Settings
2.21.4 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 EM >BLOCK stator earth fault protection
5176 >S/E/F Iee off EM >Switch off earth current detec.(S/E/F)
5181 S/E/F OFF AM Stator earth fault prot. is switch OFF
5182 S/E/F BLOCKED AM Stator earth fault protection is BLOCK.
5183 S/E/F ACTIVE AM Stator earth fault protection is ACTIVE
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