Technical DataEffective: May 1998 Page 3TD.44A.01.T.ECutler-Hammer Magnum DSMetal-EnclosedLow-Voltage SwitchgearTable R1 – Voltage Ratings (AC)System Voltage Maximum Voltage208/240480600254508635Table R4 – Ratings of Magnum DS BreakersBreakerTypeFrameAmperesRatings, RMS Symmetrical Amperes (000)Interrupting Rating Short Time RatingÀ208-240V 480V 600V 208-240V 480V 600VMDS-408MDS-608MDS-808MDS-C08MDS-616MDS-816MDS-C16MDS-620MDS-820MDS-C20MDS-632MDS-832MDS-C32MDS-840MDS-C40MDS-850MDS-C50800800800800160016001600200020002000320032003200400040004000500042658510065851006585100658510013013013013042658510065851006585100658510085100851004265851006585100658510065851008510085100426585856585856585856585858510085100426585856585856585856585858510085100426585856585856585856585858510085100Table R2 – Available Bus RatingsCrossBusAmpacityVerticalBusAmpacityBus Bracing200032004000500060002000320040005000—100kA, 150kA, 200kANote: In addition to the available busbracings shown above, the bus hasbeen tested for short circuit values of85,000 amperes for a full 60 cycles.Table R3 – StandardsMagnum DS switchgear conforms to thefollowing standards: NEMA SG3 and SG5,CSA, ANSI C37.20.1, C37.51, andUL Standard 1558.Maximum voltages at which the inter-rupting ratings in Table R4 apply are:These interrupting ratings are basedon the standard duty cycle consistingof an opening operation, a 15-secondinterval and a close-open operation, insuccession, with delayed tripping incase of short-delay devices.The standard duty cycle for short-timeratings consists of maintaining therated current for two periods of 1/2 sec-ond each, with a 15-second interval ofzero current between the two periods.System Voltage Maximum Voltage208 or 240480600254508635Table R5 – Magnum DS Breaker Control Voltages and CurrentsControl Voltage 24 DC 48 DC 125 DC 120 AC 240 ACClose current (SR), ampereShunt trip current, ampereSpring charge motor ampere2.702.708.001.301.304.000.670.673.000.590.593.000.340.343.00Control voltage range:Close –Trip –18-2618-2638-5628-56100-14070-140104-12760-127208-254208-254Motor currents are running currents. Inrush is approximately 400%. Motor running time tocharge spring approximately 5 seconds.À Also ratings without instantaneous trip.Ratingswww . ElectricalPartManuals . com