BUS BAR ASSEMBLY

A bus bar assembly includes a first bus bar including a narrowing portion with a reduced cross-sectional area in a first direction between the end portions thereof, a second bus bar spaced from the first bus bar, an arc-blocking portion disposed to surround the narrowing portion at the least, a magnetic core disposed on the outside of the arc-blocking portion, and a housing accommodating respective portions of the first bus bar and the second bus bar, the arc-blocking portion, and the magnetic core.