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Operation
7.3 Remote mode
Manual, 08/2017, L1V30368969104A-02
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7.3.2 Continuous operation logic
The figure below shows an example of the control logic of the 3KC4 and 3KC8 transfer
switching equipment in the case of continuous operation logic:
The 3KC4 and 3KC8 transfer switching equipment is switched over to a specific position (I or
II) and remains there while the signal is active:
● Contact 312 must be short-circuited with contact 317 and the corresponding PIN (I or II or
O) for a transfer to occur. Contacts 312 and 317 can be short-circuited with the 3SB3000-
2KA11 toggle switch in conjunction with a contact block with a 3SB3400-0BA contact
element.
● Commands I and II take priority over O and they can be set using the 3SB3000-2DA11
toggle switch in conjunction with two contact blocks with a 3SB3400-0BA contact element
(for I and II).
● The O command must always be active for continuous operation logic. This command
(316) can be maintained with the 3SB3000-2KA11 toggle switch in conjunction with a
contact block with 3SB3400-0BA contact element.
● Commands I and II have the same priority, in other words, the active command (I or II)
remains active until it is interrupted.
● If commands I and II occur simultaneously, no change takes place. If then a command
expires, no change is made.
● The OFF position has priority over all commands and also functions when contact 312
(activate remote mode) is not connected. This causes the switch to change to position O.
The OFF command can be executed with the 3SB3000-2KA11 toggle switch in
conjunction with a contact block with 3SB3400-0BA contact element.