Siemens SIPROTEC

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 IL1 at the local end 98 % angle 0°
Current IL1 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 IL1 (% of operational rated current)
7763 „ΦI L1=“ MW Angle IL1_remote <-> IL1_local
7764 „IL2_opN=“ MW IL2 (% of operational rated current)
7765 „ΦI L2=“ MW Angle IL2_remote <-> IL2_local
7766 „IL3_opN=“ MW IL3 (% of operational rated current)
7767 „ΦI L3=“ MW Angle IL3_remote <-> IL3_local
7769 „UL1_opN=“ MW UL1 (% of operational rated voltage)
7770 „ΦU L1=“ MW Angle UL1_remote <-> UL1_local
7771 „UL2_opN=“ MW UL2 (% of operational rated voltage)
7772 „ΦU L2=“ MW Angle UL2_remote <-> UL2_local
7773 „UL3_opN=“ MW UL3 (% of operational rated voltage)
7774 „ΦU L3=“ MW Angle UL3_remote <-> UL3_local