[logik-open-pole-detek-wlk-120902, 1, en_GB]
Figure 2-67
Open pole detector logic
1-pole dead time
During a 1-pole dead time, the load current flowing in the two healthy phases forces a current flow via earth
which may cause undesired pickup. The raising zero- sequence voltage can also produce undesired responses
of the functions.
The indications
1pole open L1
(No. 591),
1pole open L2
(No. 592) and
1pole open L3
(No. 593) are
additionally generated if the “Open Pole Detector” detects that current and voltage are absent in one phase –
Functions
2.8 Function Control and Circuit Breaker Test
154 SIPROTEC 4, 7VK61, Manual
C53000-G1176-C159-5, Edition 05.2018
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