Eaton SBN-508 Instructions For Installation, Operation And Maintenance

Also see for Magnum SB Series: Technical product guide

Contents

5Instructional L eaet IB2C12063H03Effective March 2012Instructions for Installation, Operation andMaintenance of Magnum SB Insulated CaseLow Voltage Power Circuit BreakersEATON CORPORATION www.eaton.comPurposeThis instruction manual is expressly intended to cover theinstallation, operation and maintenance of Magnum SB PowerCircuit Breakers These circuit breakers may be supplied aspart of complete switchboard assemblies or as separatecomponents This manual applies only to the circuit breaker and(if drawout) it’s mating cassette Magnum SB circuit breakersmay also be supplied as fixed mounted devices In the case offixed versions of Magnum SB circuit breakers, certain sectionsof this manual, referring to such items as position interlocks andthe drawout mechanism, will not applyTrip units associated with Magnum SB Power Circuit Breakerswill be addressed in a general manner in this manual Specifictrip unit details and time-current characteristic curves arecovered in separate documents specific to the trip unitsMagnum SB and circuit breaker accessory items are discussedbriefly in this manual Field installation instructions for suchitems, however, are covered in individual instruction leafletsspecific to the accessory This information is also available fromthe Eaton website at www EatonElectrical comFor application information, consult Eaton or see applicableProduct Guides, Technical Documents, Application Publicationsand/or Industry StandardsSafetyAll safety codes, safety standards and/or regulations must bestrictly observed in the installation, operation and maintenanceof this equipmentWARNINGTHE WARNINGS AND CAUTIONS INCLUDED AS PART OF THEPROCEDURAL STEPS IN THIS MANUAL ARE FOR PERSONNEL SAFETYAND PROTECTION OF EQUIPMENT FROM DAMAGE. AN EXAMPLEOF A TYPICAL WARNING LABEL HEADING IS SHOWN ABOVE TOFAMILIARIZE PERSONNEL WITH THE STYLE OF PRESENTATION. THISWILL HELP TO INSURE THAT PERSONNEL ARE ALERT TO WARNINGS.IN ADDITION, CAUTIONS ARE ALL UPPER CASE AND BOLDFACE.Section 1: IntroductionGeneral InformationThe Magnum SB Power Circuit Breaker can be fixed or drawoutair circuit breaker utilizing an electronic tripping system Itis designed for use in both switchboard and metal-enclosedswitchgear assemblies having maximum voltages of 635volts ac Magnum SB circuit breakers are available in threephysical frame sizes with continuous current ratings from800 through 5000A and interrupting capacities from 50 kA to150 kA The three physical frame sizes have common heightand depth dimensions, differing only in width (Figure 1) Thecircuit breaker nameplate provides complete rating informationAll Magnum SB circuit breakers are 100 percent rated, ULlisted, and are built and tested in an ISO 9002 certified facilityto applicable NEMA, ANSI, IEEE and UL standards (Table 1,Figures 2 and 3)Magnum SB circuit breakers use a rigid frame housing ofengineered thermoset composite resins which has highstrength structural properties, excellent dielectric characteristicsand arc tracking resistanceThe drawout Magnum SB circuit breaker is a through-the-doordesign having three breaker positions with the compartmentdoor closed (CONNECT, TEST, DISCONNECT) and one positionout of its compartment on extension rails (REMOVE) Theoperating mechanism is a two-step stored energy mechanism,either manually or electrically operatedWhen withdrawn on captive compartment cassette extensionrails, Magnum SB circuit breakers can be inspected, accessoryitems added, and minor maintenance performed The inside ofthe compartment can also be inspected with the circuit breakeron its extension railsCAUTIONPLEASE READ AND UNDERSTAND THESE INSTRUCTIONS BEFOREATTEMPTING TO UNPACK, INSTALL, OPERATE OR MAINTAINTHIS EQUIPMENT. STUDY THE BREAKER AND ITS MECHANISMCAREFULLY BEFORE ATTEMPTING TO OPERATE IT ON AN ENERGIZEDCIRCUIT.WARNINGMAGNUM SB CIRCUIT BREAKERS SHOULD NOT UNDER ANYCIRCUMSTANCES BE APPLIED OUTSIDE THEIR NAMEPLATERATINGS. OPERATION OUTSIDE OF THESE RATINGS COULD RESULTIN DEATH, BODILY INJURY OR PROPERTY DAMAGE.