Functions
2.26 Additional Functions
SIPROTEC, 7SD5, Manual
C53000-G1176-C169-5, Release date 02.2011
477
2.26.6
Measured Values Constellation
2.26.6.1 Functional Description
The measured values constellation of the possible devices 1 to 6 is shown here using the example of device 1
(see Table 2-23). Information for further devices is given in the Appendix.
The computation of this measured values constellation is also performed during an existing system fault at an
interval of approx. 2 s.
The locally measured current/voltage is used as a reference for the angle. The angle values of the remote ends
refer to the locally measured value.
Example for the current of a 2-ends constellation:
Current
I
L1 at the local end 98 % angle 0°
Current
I
L1 at the local end 98 % angle 180°
By means of the device address, the devices can be distinguished one from another. Via the device address,
a polarity reversal of the current transformer can be detected immediately and the line angle can be read (if
voltages are available).
Table 2-23
Constellation measured values for device 1
No.
Information
Info type
Explanation
7761
„Relay ID“
MW
Device address of the first devcie
7762
„IL1_opN=“
MW
I
L1 (% of operational rated current)
7763
„
Φ
I L1=“
MW
Angle
I
L1_remote <->
I
L1_local
7764
„IL2_opN=“
MW
I
L2 (% of operational rated current)
7765
„
Φ
I L2=“
MW
Angle
I
L2_remote <->
I
L2_local
7766
„IL3_opN=“
MW
I
L3 (% of operational rated current)
7767
„
Φ
I L3=“
MW
Angle
I
L3_remote <->
I
L3_local
7769
„UL1_opN=“
MW
UL1 (% of operational rated voltage)
7770
„
Φ
U L1=“
MW
Angle UL1_remote <-> UL1_local
7771
„UL2_opN=“
MW
UL2 (% of operational rated voltage)
7772
„
Φ
U L2=“
MW
Angle UL2_remote <-> UL2_local
7773
„UL3_opN=“
MW
UL3 (% of operational rated voltage)
7774
„
Φ
U L3=“
MW
Angle UL3_remote <-> UL3_local
