Protection - Siemens SIPROTEC 7VU681 User Manual

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2.2

Protection

Protection functions can be set on or set off by the 226 Protection Functions.
When the rated frequency is 50Hz, the operation range of frequency of protection functions is 20Hz to 66Hz.
When the rated frequency is 60Hz, the operation range of frequency of protection functions is 25Hz to 66Hz.
Protection functions will be unavailable if frequency is beyond the range.
The setting values and their default values of current related parameters as following are under a rating of 1A
rated secondary current. When the rated secondary current is 5A, the values should be multiplied by 5.
SIPROTEC, 7VU681, User Manual
C53000-G1176-C368-1, Release Date 07.2012
Information
Transformer2 -> Transformer1
Failed
Load Shifting Pickup
Load Shifting Succeeded
Load Shifting Failed
Busbar Load Shifting is Actived
>Neighboring ATS is Ready
>Start Load-Shedding Line1
>Start Load-Shedding Line2
Load-Shedding Pickup
Load-Shedding Trip (TimeDelay1) OUT
Load-Shedding Trip (TimeDelay2) OUT
L1->L2 ON/FF
L2->L1 ON/FF
B1->B2 ON/FF
B2->B1 ON/FF
T1->T2 ON/FF
T2->T1 ON/FF
B1->B2 LSON/OFF
B2->B1 LSON/OFF
Type Function No.
OUT 200
OUT
OUT
OUT
OUT
SP
SP
SP
OUT
200
200
IntSP
IntSP
IntSP
IntSP
IntSP
IntSP
IntSP
IntSP
Function
2.2 Protection
Info. No.
39
41
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