This is Switch Disconnector Fuse Unit SB/SBC Equivalent L&T FB or L&T FBC SFU Switch.
These are highly rugged and heavy duty best in it's class in whole world.
heavy thigh electrical grade copper with silver electroplating is used for manufacturing these sfu switch fuse unit.
you can use size 02 & size 03 HRC fuses in these sfu.
Maximum NTPC, Power Grid and other biggest projects use these switch disconnector fuse.
Available Rating are 250A, 400A, 630A & 800A
Switch Fuse Unit
Switch Disconnector Fuse Unit
Switch Disconnector Fuse
Fuse Switch Unit