[schieflastschutz-t-abkuehl1, 1, en_GB]
This value does not depend on whether the respective values were set to secondary values, as the current
transformation ratios are reduced in numerator and denominator.
You can set the I2>> stage additionally as back-up stage for system faults as described above (margin
heading “Definite-time StagesI2>>, I2> (O/C)”).
NOTE
The following applies to the parameter overview:
The current values Ι/Ι
NS
refer to the rated current of the side to be protected of the main protected object.
Settings
The table indicates region-specific presettings. Column C (configuration) indicates the corresponding secon-
dary nominal current of the current transformer.
Addr. Parameter C Setting Options Default Setting Comments
4001 UNBALANCE LOAD OFF
ON
Block relay
OFF Unbalance Load (Negative
Sequence)
4011 I2>> 1A 0.10 .. 3.00 A; ∞ 0.50 A I2>> Pickup
5A 0.50 .. 15.00 A; ∞ 2.50 A
4012 I2>> 0.10 .. 3.00 I/InS; ∞ 0.50 I/InS I2>> Pickup
4013 T I2>> 0.00 .. 60.00 sec; ∞ 1.50 sec T I2>> Time Delay
4014 I2> 1A 0.10 .. 3.00 A; ∞ 0.10 A I2> Pickup
5A 0.50 .. 15.00 A; ∞ 0.50 A
4015 I2> 0.10 .. 3.00 I/InS; ∞ 0.10 I/InS I2> Pickup
4016 T I2> 0.00 .. 60.00 sec; ∞ 1.50 sec T I2> Time Delay
4021 I2p 1A 0.10 .. 2.00 A 0.90 A I2p Pickup
5A 0.50 .. 10.00 A 4.50 A
4022 I2p 0.10 .. 2.00 I/InS 0.90 I/InS I2p Pickup
4023 T I2p 0.05 .. 3.20 sec; ∞ 0.50 sec T I2p Time Dial
4024 D I2p 0.50 .. 15.00 ; ∞ 5.00 D I2p Time Dial
4025 I2p DROP-OUT Instantaneous
Disk Emulation
Instantaneous I2p Drop-out Characteristic
4026 IEC CURVE Normal Inverse
Very Inverse
Extremely Inv.
Extremely Inv. IEC Curve
4027 ANSI CURVE Extremely Inv.
Inverse
Moderately Inv.
Very Inverse
Extremely Inv. ANSI Curve
4031 I2> 1A 0.01 .. 4.00 A; ∞ 0.10 A Continously Permissible
Current I2
5A 0.05 .. 20.00 A; ∞ 0.50 A
4032 I2 tolerance 0.01 .. 0.80 I/InS; ∞ 0.16 I/InS Permissable quiescent
unbalanced load
4033 T WARN 0.00 .. 60.00 sec; ∞ 20.00 sec Warning Stage Time Delay
2.8.3
Functions
2.8 Unbalanced Load Protection
198 SIPROTEC 4, 7UT6x, Manual
C53000-G1176-C230-5, Edition 09.2016
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