Eaton MDN-408 Instructions For Installation, Operation And Maintenance

SECTION 1: INTRODUCTION1-1 GENERAL INFORMATIONThe Magnum DS and DSX Power Circuit Breakers canbe fixed or drawout air circuit breakers utilizing an elec-tronic tripping system. The Magnum DSL circuit breakerutilizes the same tripping system, but is available only inthe drawout configuration. MDSL and MDSX versionshave current-limiting characteristics as indicated by the“Current Limiting” badge on the front covers. All break-ers are designed for use in both switchboard and metal-enclosed switchgear assemblies having maximum volt-ages of 635 volts ac MDS type breakers, 600 volts ac forMDSL type breakers, and 480 volts ac for MDSX typebreakers. Magnum DS circuit breakers are available inthree physical frame sizes with continuous current rat-ings from 800 through 6000A. and interrupting capacitiesfrom 42 kA to 200 kA. The three MDS physical framesizes have common height and depth dimensions, differ-ing only in width (Figure 1-1). Magnum DSL circuit break-ers are available in one frame size with continuous cur-rent ratings from 800 through 2000A and an interruptingcapacity up to 200,000A (Figure 1-5). Circuit breakernameplates provide complete rating information. AllMagnum DS, Magnum DSX, and Magnum DSL circuitbreakers are 100 percent rated, UL listed, and are builtand tested in an ISO 9002 certified facility to applicableNEMA, ANSI, IEEE and UL standards (Tables 1.1 and1.2, Figures 1-2, 1-3 and 1-4).Magnum circuit breakers use a rigid frame housing ofengineered thermoset composite resins which has highstrength structural properties, excellent dielectric char-acteristics and arc tracking resistance.MDS, MDSX and MDSL drawout circuit breakers are athrough-the-door design having three breaker positionswith the compartment door closed (CONNECT, TEST,DISCONNECT) and one position out of its compartmenton extension rails (REMOVE). The operating mecha-nism is a two-step stored energy mechanism, eithermanually or electrically operated.When withdrawn on captive compartment cassetteextension rails, MDS, MDSX and MDSL circuit breakerscan be inspected, accessory items added, and minormaintenance performed. The inside of the compartmentcan also be inspected with the circuit breaker on itsextension rails.Please read and understand these instructionsbefore attempting to unpack, install, operate ormaintain this equipment. Study the breaker and itsmechanism carefully before attempting to operate iton an energized circuit.MAGNUM CIRCUIT BREAKERS SHOULD NOTUNDER ANY CIRCUMSTANCES BE APPLIED OUT-SIDE THEIR NAMEPLATE RATINGS. OPERATIONOUTSIDE OF THESE RATINGS COULD RESULT INDEATH, BODILY INJURY OR PROPERTY DAMAGE.Instruction BookPage 1Effective: May 2006I.B. 2C12060H08 For more information visit: www.EatonElectrical.comFigure 1-1 Family of Magnum DS (MDS) Low Voltage Power Fixed and Drawout Circuit Breakers (800-5000 Amperes)NOTICEDouble-wide Fixed MDSNarrow Frame Fixed MDSStandard Frame Drawout MDS! WARNINGwww . ElectricalPartManuals . com