GE 300 Series Instruction

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GE 300 Series Instruction Manual pdf 1 page image

Max.HpFor AC MotorsStarterMaxCurrentRatingContactorMax.CurrentRatingACVolts Single-PhasePoly-PhaseSize 0115 1 -200 - 3230 2 318 amp(openandenclosed)20 amp(open)18amp(enclosed) 460—575 - 5Size 1115 2 -200 - 7½230 3 7½27 amp(openandenclosed)30 amp(open)27amp(enclosed) 460—575 - 10Note: For starters with one or morenormally closed contacts, perform steps1 and 2 shown under Coil Replacement.Withdraw spring clip (B—Figure 1) andremove armature, coil, and magnet fromdevice. Remove return spring from centerof movable arm. Remove molded coverand stationary contacts before liftingmovable arm from device.Normally Closed ContactsThe contacts may be converted fromnormally open to normally closed with noadditional parts. Perform steps 1 through4 shown under Coil Replacement. Lift coiland magnet from movable arm. Removereturn spring from center of movablearm. Depress movable contact springand spring seat against movable contactand rotate these parts 1/2 turn withoutremoving them from window. Removethe stationary contacts. Install themovable arm in the device. Install thestationary contacts so that their silverpads face the movable contact silverpads. Reassemble the device. To changecontacts from normally closed tonormally open position, reverse theabove procedure.Check For Welded Contacts InOverload RelayWith power disconnected, disconnectthe control wiring from the relayterminals. Place a bell set or resistancemeasuring instrument across relayterminals. Depress and release resetarm to insure relay is reset.6. Remove screws holding stationarycontacts in place and remove stationarycontacts.7. Reassemble device by reversingprocedure.CombinationMagnetic StartersCR307-CR308, CR310-CR311, CR387, CR390, CR407-CR408CR410-CR415, CR487, CR490, CR492, CR494 SeriesMotor branch circuit and control circuitover- current protection should besupplied in accordance with theNational Electrical Code. CR305contactors are suitable for use on acircuit capable of delivering not morethan 5,000 RMS symmetrical amperes,600 volts maximum when protected byH, J, K1, K5, RK1, RK5 class fuses, or acircuit breaker having an interruptingrating not less than 5,000 RMSsymmetrical amperes.InstallationBefore connecting controller to powersupply:1. Remove all packing.2. Clean magnet mating surfaces of anydirt or foreign matter.3. Select and install heaters in accordancewith heater table.4. Operate movable magnet and operatingarm by pressing on the nameplate toassure free movement.5. Mount on a sturdy vertical support.6. Make the electrical connections.7. The starter overload relay may be resetmanually by depressing and releasing thereset arm.Coil Replacement1. Remove power from device.2. Press against coil while pulling upslightly on coil retainers (A—Figure 1) andmove retainers away from coil.3. Withdraw magnet assembly, coil,molded cover, and movable arm fromdevice.4. Withdraw spring clip (B—Figure 1) andremove armature from movable arm.5. Remove coil from magnet.6. Replace coil.7. Reassemble device by reversingprocedure.Contact Replacement1. Perform steps 1 through 5 underCoil Replacement.2. Remove magnet from molded coverand movable arm.3. Remove return spring from centerof movable arm.4. Remove molded cover frommovable arm.5. Depress and slide movable contactand spring from movable arm.Instructions ForNEMA size 0 & 1Supersedes GEH-4793B& GEH4796BGEH-5193 InstructionCAUTION: Before installing in a nuclearapplication, determine that the product isintended for such use.WARNING: Disconnect powerbefore Installing or servicing.DescriptionGeneral Electric 300/400-Line full-voltagemotor starters include a magneticcontactor and a three-leg block overloadrelay, providing motor protection againstrunning and stalled motor overloads. Theoverload relay is provided with a yellowtrip indicator located to the right of thereset arm, and is visible when theoverload relay is tripped.Ratings—600 V MaximumFigure1.Typical 300/400-Line magnetic starterFigure2

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