Eaton SC9000 VFD
With the Eaton SC9000VFD double-bus,a second 1200 amp VFD busis located above the mainbus, adding only 8 inches ofadditional height to the system.The Ampgard SC 9000 doublebusenables close-coupling ofan optional 24-inch-wide driveoutput contactor and multiplemotor bypass and motor selectcontactors under a commonbus alignment.Ampgard SC9000 integratedControl Gear synchronoustransfer control design givesEatons customers the benefit ofa compact and reliable system.
SC9000 Features
The Eaton SC9000 VFD double-bus is integrated witha 24-inch-wide drive outputcontactor (optional) and36-inch-wide motor bypassand motor select contactorsstructure that can be equippedwith a 400 amp or 800 amp contactor,as required.A 400 amp motor bypass contactorand a 400 amp motor selectcontactor can be double-stackedin a single, 36-inch-wide cabinetfor motor systems up to3000 horsepower.
Eaton SC9000 VFD Ampgard double-bus design for synchronous transfercontrol was first to market. Do not be misled by cable copy cats800 amp motor bypass and motorselect contactor assemblies, whichrequire two 36-inch-widestructures for a total widthof 72 inches per motor.
Synchronous transfer systemshelp power generating facilitiesmaximize the capital efficiencyof their systems by controllingmultiple motors with oneadjustable frequency drive.Most manufacturers synchronoustransfer control systemhave multiple drive output andmotor select contactors thatare interconnected typically viacables to allow the VFD tomanage multiple motors.
With the Eaton SC9000 VFD Ampgard and the Ampgard IntegratedControl Gear VFD double-busdesign, the drive output andmotor select contactors areclose-coupled under a commonpower bus (no cables) giving customers the compact designand superior performance theyexpect from the Eaton brand.
The basic principle of synchronous transfer controlis to adjust the Eaton SC9000 VFD output voltage, frequencyand phase to match the utility.By matching these parameters, the drive systemcan transfer a motor from the SC9000 output tothe utility in a bump-less manner.The Eaton SC9000 VFD and PLC systems are programmed tostart or stop a single motor, as well as sync up ordown to other motors as needed.Upon system startup, the SC 9000 and VFD busare energized.The PLC closes the drive output contactor and thedesignated motor select contactor and starts the SC9000, allowing power to be directed to the desiredmotor (M1 above) for operation.The designated motor can now be operated atadjustable speed as needed.When an additional motor is required, the PLC willsend the sync up command to the SC9000.
The Eaton SC9000 VFD adjusts its output to match the linevoltage, frequency and phase angle. Once the driveoutput and line are synchronized, the system willtransfer the motor from the drive output to the utilityby opening the motor select contactor (M1) andclosing the motor bypass contactor (B1).Once synchronization is locked, the adjacent motorselect contactor (M2) is closed, and the Eaton SC9000 VFD can now operate theadditional motor at variablespeed as needed.
To learn more about the Eaton SC9000 VFD, visit the Eaton Website.
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