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Function
2.3 Monitor Function
2.3
Monitor Function
When the rated frequency is 50Hz, the frequency operation range of supervision functions is 45Hz to 66Hz.
When the rated frequency is 60Hz, the frequency operation range of supervision functions is 55Hz to 66Hz.
2.3.1
PT Broken Wire Supervision
PT broken wire supervision contains busbar PT broken wire supervision and line PT broken wire supervision.
Figure 2-29
Logic Diagram of Busbar PT Broken Wire Supervision
Logic of busbar PT broken wire supervision:
1. UN is the secondary rated busbar voltage, that is 236 PT Rated Secondary Voltage Busbar.
2. If Segment Single Busbar primary diagram is selected, then U1N and U2N will replace UN in the figure
above.
3. If the busbar is supplied by line1, ILine is IL1; if busbar is supplied by line2,ILine is IL2.
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SIPROTEC, 7VU681, User Manual
C53000-G1176-C368-1, Release Date 07.2012
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