No. Information Type of
Informa-
tion
Comments
1079 Θ RTD12 = MV Temperature of RTD12
Differential and Restraining Measured Values
Depending on its configuration, the device calculates the measured values that are specific to differential
protection.
Functional Description
The differential and restraining values of the differential protection and the restricted earth fault protection
are listed in table Table 2-16. They always refer to the nominal current of the main protected object, which
results from the parameterised nominal data of the main protected object (Section 2.1.5.1 Purpose of Setting
Groups). For multi-winding transformers with different winding ratings, the most powerful winding is deci-
sive, for busbars and lines the nominal operation current as set for the protected object. In case of 1-phase
busbar protection, only the values of the connected and declared phase are displayed.
In case of restricted earth fault protection, the nominal phase currents provide the reference value.
Table 2-16 Measured values of differential protection
Measured Values % referred to
ΙDiffL1, ΙDiffL2, ΙDiffL3
Calculated differential currents of the three phases Operational rated current of the
protected object
ΙRestL1, ΙRestL2, ΙRestL3
Calculated restraining currents of the three phases Operational rated current of the
protected object
ΙDiffEDS
Calculated differential current of the restricted earth
fault protection
Rated operational current of the
side or 3-phase measuring loca-
tion
ΙRestEDS
Calculated restraint current of the restricted earth
fault protection
Rated operational current of the
side or 3-phase measuring loca-
tion
Information List
No.
Information Type of
Informa-
tion
Comments
199.2640 IdiffREF= MV Idiff REF (I/Inominal object [%])
199.2641 IrestREF= MV Irest REF (I/Inominal object [%])
205.2640 IdiffRE2= MV Idiff REF2 (I/Inominal object [%])
205.2641 IrestRE2= MV Irest REF2 (I/Inominal object [%])
7742 IDiffL1= MV IDiffL1(I/Inominal object [%])
7743 IDiffL2= MV IDiffL2(I/Inominal object [%])
7744 IDiffL3= MV IDiffL3(I/Inominal object [%])
7745 IRestL1= MV IRestL1(I/Inominal object [%])
7746 IRestL2= MV IRestL2(I/Inominal object [%])
7747 IRestL3= MV IRestL3(I/Inominal object [%])
2.22.4
2.22.4.1
2.22.4.2
Functions
2.22 Auxiliary Functions
SIPROTEC 4, 7UT6x, Manual 287
C53000-G1176-C230-5, Edition 09.2016
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