The protection functions can switch off 1-pole. The close command is always 3-pole. Optionally, only the open
poles are closed.
[dw1polls-020211-01.tif, 1, en_US]
Figure 6-14 Circuit Breaker with 1-Pole Triggering
For the circuit breaker with 1-pole triggering, triggering takes place via one relay per phase for the trip
command and via a 4th relay for the close command (see next figure).
[dw1panls-020211-01.tif, 1, en_US]
Figure 6-15 1-Pole Connection of a Circuit Breaker
Control Functions
6.2 Switching Devices
318 SIPROTEC 5, High-Voltage Bay Controller, Manual
C53000-G5040-C015-9, Edition 11.2017
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