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2 Functions
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
Addr.
Parameter
5001
S/E/F PROT.
5002
U0>
5003
3I0>
5004
DIR. ANGLE
5005
T S/E/F
2.21.4 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
134
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
EM
>BLOCK stator earth fault protection
EM
>Switch off earth current detec.(S/E/F)
AM
Stator earth fault prot. is switch OFF
AM
Stator earth fault protection is BLOCK.
AM
Stator earth fault protection is ACTIVE
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
Comments
7UM61 Manual
C53000-G1176-C127-3
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