power distribution - Siemens

Molded Case Circuit BreakersDigital Solid State Sentron Sensitrip III SeriesThe Sentron Sensitrip III circuitbreaker is a true RMS current sensingdevice. Digital microprocessorcircuitry within the electronic trip unitprovides more precise control overthe circuit breaker functions. Thiscontrol allows circuit coordinationflexibility not available with thermalmagnetic circuit breakers.Functions available in Sentron Sensitrip circuit breakersLetter “A” is used for MD and ND Solid State frame types only.Typical Trip Unit Labeling and Adjustment Positions for the Sentron Sensitrip Circuit Breaker.TechnicalShortCont Long Instan- Short Short Time Ground GroundCatalog Number Trip Current Time taneous Time Time l 2 t Fault Fault(Description + Suffix) Type Setting Delay Setting Pick Up Delay Pick Up Pick Up DelayBasic Unit + (A) LI Basic Unit + (A)G LIG Basic Unit + (A)NT LSI Basic Unit + (A)NGT LSIG SMD6, SHMD6, SCMD6, SND6, SHND6, SCND6, SPD6, SHPD6SJD6, SHJD6, SCJD6, SCD6, SHLD6, SCLD66MOLDED CASECIRCUIT BREAKERSl n = Maximum circuit breaker ampererating.l r = Current Rating — a function ofcontinuous ampere adjustmentsetting expressed in % of l n .l g = Ground Fault Pickup — a functionof adjustment setting expressed in% of l n .Siemens Power Distribution & Control, SPEEDFAX 2007-2008 Product Catalog 6-73