Answer / prashant patil

Bus coupler is used to connect two bus section in bus bar.
where as bus riser is used to rise lower the end of the bus
coupler circuit breaker to bus bar level. it also used to
mount bus bar PT & Protection CT on bus riser. There for it
used for three pourpose so need not requrid extra panel for
bus PT.

Answer / ahmed

Act as connector between MDBs and SMDBs by the blg in box
(tap off )
Used in high rating currents with low voltage drop it
contain from cupper tabs separated by insulation for
connector (RYPNE) There is many types and rating of bus
bare as per sit condition

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