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Function
2.2 Protection
2.2.1
Phase Overcurrent Protection
This device supplies 2 stages of definite time phase overcurrent protection.
Figure 2-25
1.Compound voltage control can be enabled or disabled by setting the parameter 9001 Compound Voltage
Control to YES or NO.
2. PT broken wire cannot block the phase overcurrent protection.
3. After the trip signal is released, the dropout of the voltage signal cannot reset the trip signal, only current
dropout can reset the trip signal.
48
Logic Diagram of the Phase Overcurrent Protection
SIPROTEC, 7VU681, User Manual
C53000-G1176-C368-1, Release Date 07.2012
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