https://se.mitsubishielectric.com/fa/products/lv_distri/lvc-breakers/spcb/isolation-switches-dsn/dsn32-sv-3p.html
DSN32-SV 3P
On creating an isolation switch (DSN) by omitting the overcurrent tripping device of a MCCB, it can be used as a switching device with high operating capacity.
sv