Russian ⇄ Chinese English French German Norwegian Bokmål Polish

секционный разъединитель stresses
electr.eng.	tie-breaker (согласно комментарию к multitran.ru Aiduza)
electric.	tie isolator (VissonAn)
energ.ind.	bus-tie switch (MichaelBurov); busbar coupler (MichaelBurov); bus bar coupler (MichaelBurov); bus coupler (MichaelBurov)
energ.syst.	bus-sectionalizing disconnector (crueldrummer)
railw.	sectional switch (контактной сети)
tech.	section switch; sectionalizer; sectionalizing switch

секционный разъединитель: 5 phrases in 3 subjects

Oil and gas technology	1
Rail transport	1
Technology	3