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Bulletin SIB2.7-8Sensitrip®MD & ND-FrameInformation andInstruction GuideI-T-E® Molded CaseCircuit Breakers

8MD and ND-Frame Trip AdjustmentsFigure 1In = Maximum circuit breaker ampere rating.Ir = Current Rating—a function of continuous ampere adjust-ment se

MD and ND-Frame Trip Adjustments9Figure 1In = Maximum circuit breaker ampere rating.Ir = Current Rating—a function of continuous ampere adjust-ment se

10MD and ND-Frame Time Current Curve600-1000A With Short Time Delay Set on Fixed Time

MD and ND-Frame Time Current Curve111200A With Short Time Delay Set on Fixed Time

12MD and ND-Frame Time Current Curve600-100A With Short Time Delay Set on I2t

MD and ND-Frame Time Current Curve131200A With Short Time Delay Set on I2t

14MD and ND-Frame Time Current Curve600-100A Without Short Time Settings

MD and ND-Frame Time Current Curve151200A Without Short Time Settings

16MD and ND-Frame Time Current CurveGround Fault Trip Data

MD and ND-Frame Time Current Curve17Example

18MD and ND-Frame Let-Thru Curves

I-T-E Connecting Studs (RS5785, RS5786)19GeneralThese connecting studs can be used on 3-pole circuitbreakers and on line and load terminals. Both the

20I-T-E Connecting Studs (RS5785, RS5786)Circuit Breaker PreparationA. Remove terminal shield (1) from line and load side ofbreaker frame. Two #8-32 s

I-T-E Connecting Studs (RS5785, RS5786)21F Remove the positioning template.G. Mount the circuit breaker by positioning it over the rearbusbar mounting

22I-T-E Pressure Wire ConnectorsGeneralNOTE: This instruction outlines the recommended installationprocedure for all MD and ND Frame pressure wireconn

I-T-E Pressure Wire Connectors23Connector(2) CatalogNumbersCircuit Breaker AmpereRating (In)Connector Wire Range Set Screw Torque For Use With Type(s)

24I-T-E Compression Connectors (CCM800, CCN1200)GeneralNOTE: This instruction sheet outlines the recommendedinstallation procedure. Use of lugs may re

I-T-E Compression Connectors (CCM800, CCN1200)25Figure 3K. Position connector tang on top of the circuit breakerterminal pad and secure with 3/8-16 X

26I-T-E Handle Blocking Device (MN6BL)GeneralThe handle blocking device, MN6BL, is provided to permitblocking the toggle handle of an MD and ND-Frame

I-T-E Handle Padlocking Device (MN6HPL)27GeneralThe padlocking device, MN6HPL, consists of the handleblocking device (3) and an additional component (

I-T-E MD and ND-Frame Circuit Breakers3-Pole, 600-1200 AmperesTypes SMD6, SND6, SHMD6, SHND6, SCMD6, SCND6Digital Solid State Circuit BreakersTable of

28I-T-E Plug-In AdaptersNOTE: Plug-in adapters are for use only with MD-Frame.GeneralA complete plug-in installation requires one line end adapterasse

Installation Diagrams29

30I-T-E Mechanical Interlock (M15404)Figure 1Circuit Breaker PreparationA. Turn off and lock out all power supplying circuit breakeror frame before re

I-T-E Mechanical Interlock (M15404)31Support Tie Bar MountingA. With 9-in. long tie bar wrench (8) supplied (Figures 2 and3) positioned around left po

32I-T-E Mechanical Interlock (M15404)D. Using tie bar wrench carefully positioned over tie barconnector, (so as not to damage support tie bar assem-bl

I-T-E Mechanical Interlock (M15404)33Figure 7

34I-T-E Internal AccessoriesCircuit Breaker PreparationA. Turn power off supplying device before installing kit.B. Make sure device is in tripped posi

I-T-E Internal Accessories35Figure 3C. Check handle for proper fit on handle arm. Replace loadend cover and cover screws. (quantity 8)Replace All Cove

36I-T-E Internal AccessoriesMechanical and Electrical CheckShunt TripA. Reset and turn circuit breaker ON.B. Attach test circuit to accessory leads. W

I-T-E Internal Accessories37Auxiliary Switch Identification (All With Three Leads)WireMarkingsWireColorSwitch Terminals or ContactsC1 or C2 White C. -

2IMPORTANTThe information contained herein is general in nature and is not intended forspecific application purposes nor is it intended as a training

38I-T-E Rotary Handle OperatorTypes 1, 3R, 4, 4X, 12Standard Depth (RHONSD)Variable Depth (RHONVD)GeneralWhen properly installed, the rotary handle op

Installation Diagrams39

40I-T-E Max-FlexTM Flange-Mount Handle OperatorTypes 1, 3R, 4, 4X, 12General InformationThe l-T-E Max-Flex Flange-Mount Handle Operator is a flex-ible

Assembly Instructions41MD and ND-Frame ApplicationA complete kit consists of handle, cable and breaker operatorThe handle can be mounted on either rig

42I-T-E Max-FlexTM Flange-Mount Handle OperatorTypes 1, 3R, 4, 4X, 12D. Place the plastic washer and connecting link onto thebellcrank pin (7). Secure

Assembly Instructions43B. Remove the lower terminal shield (14) from the circuitbreaker and punch and drill out the two .56 in. diameterknockouts .C.

44I-T-E Max-FlexTM Flange-Mount Handle OperatorCable AdjustmentA. Check that the circuit breaker turns OFF and ON bymoving the operating handle up for

I-T-E TELEMAND® Electric Motor Operator45GeneralThe motor operated mechanism is designed to open, closeand reset a circuit breaker or switch by remote

46I-T-E TELEMAND® Electric Motor OperatorF. With the circuit breaker handle in the OFF position, alignthe motor operator mechanism rollers (indicator

Installation Diagrams47

Information and Instructions3GeneralMD and ND-Frame Solid State Sensitrip style breakers of theSentron family, as shown on page 5, are for use in indi

48I-T-E Panelboard Connecting Straps(1)

I-T-E Enclosures49Type 1- MND61General purpose indoor, sheet-steel enclosure for use innormal atmosphere, listed as service-entrance equipment.Type 12

General InformationThese door latch mechanisms are for use in standard orcustom built enclosures. The door latch post assemblies andthe door catch are

Installation Diagrams51

52MD and ND-Frame Neutral Sensing TransformerGeneralThe I-T-E Neutral Sensing Transformers are available in 600,700, 800, 1000, and 1200 amp ratings.

MD and ND-Frame Neutral Sensing Transformer53Figure 3Cable System MountingNOTE: Neutral sensor transformer mounting on cable sys-tems can be done with

54MD and ND-Frame Universal Test Kit (TS-31)Caution: Remove electrical loads from the circuit breaker tobe tested prior to performing tests. Failure t

MD and ND-Frame Universal Test Kit (TS-31)55Enter Test to performH. If you press ENTER, you will be prompted for the phaseto test: The TS-31 will disp

56Ordering InformationCircuit Breaker Catalog NumbersSMD63-Pole, 600V ACCatalog NumberMax.Cont.CurreRatingCont.CurrentSettingLongTimeDelayInstantaneou

Ordering InformationCircuit Breaker Catalog Numbers57SND63-Pole, 600V ACCatalog NumberMax.Cont.CurreRatingCont.CurrentSettingLongTimeDelayInstantaneou

4I-T-E Sensitrip Digital Circuit BreakerMD and ND-Frame Outline Drawings(1)3-Pole

58# TitleShunt Trip Control Voltage 1 Shunt Trip 1Shunt Trip and1 Auxiliary SwitchAC DC Catalog Number Catalog Number120208240277480600S01MN6S02MN6S03

Ordering InformationAdditional Accessories59Item Catalog No.Extension Handle EX9Mounting Screw Kit MSMNPressure Wire Connectors(4 pcs.) 250-500 MCM Cu

60UL Listings and File NumbersIndustry SpecificationsI-T-E Items UL-489FileNumberCSA ReportNumberBreakersTerminal ConnectorsPlug-ln ConnectorsRear Stu

Siemens Energy& Automation, Inc.3333 State Bridge Rd.Alpharetta, GA 30201Bulletin SIB2.7-8 (New) (c) 1990 Siemens Energy & Automation, Inc.

I-T-E MD and ND-Frame Installation Instructions5GeneralNOTE: This instruction page outlines the recommendedinstallation procedure.The MD and ND Frame

6MD and ND-Frame Trip Adjustments

MD and ND-Frame Trip Adjustments7Figure 1In = Maximum circuit breaker ampere rating.Ir = Current Rating—a function of continuous ampere adjust-ment se