Mission critical reliabilityPatented soft start technologyIntegrated electronic protectionExpanded I/O and communicationsReal-time metering/diagnosticsDual redundant configurationsSwitched capacitance systemsGlobal standards compliance24/7 service and support

IntelligentMedium & High VoltageMotor Control Solutionswith next generation MX3 technology

OVERVIEW

IntelligentMedium & High VoltageMotor Control Solutionswith next generation MX3 technology

MXWith next generation, patented MX3 technology.

Mission critical motor control and protection …

Since introducing the world’sfirst medium voltage solid statestarter back in 1989, Benshawhas gained valuable experiencein the design, production andinstallation of high-performance,mission critical motor controlsfor heavy duty continuousprocess applications.

We’ve tackled some of thetoughest challenges—in theharshest environments imagin-able—for the most demandingindustries on earth … and thatexperience is reflected inevery product we build.

That’s why—when the appli-cation is critical, or the environ-ment harsh—more customershave specified Benshaw thanany other brand.

Rugged. Reliable. Ready.

The MX3 difference

At the heart of every mediumand high voltage control solutionfrom Benshaw is our next genera-tion, patented, multi-processorbased control technology …developed through an extensiveresearch effort and the experiencewe’ve gained from more than 5,000installations totaling well over6,000,000 horsepower.

Solid state MX3 motor controltechnology brings mission criticalreliability, integrated electronicprotection, configurable I/Os,expanded communications andreal-time metering and diagnosticsto the medium/high voltagemarketplace—all in one elegantlydesigned, highly reliable controlpackage. With more standardfeatures, more integrated protec-tion and more available optionsthan any other medium or highvoltage control on the market,Benshaw’s MX3-based controls

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World leader inmission critical motorcontrol and protection:

6,000,000 installedHP worldwide5,000+ units installedin over 40 countries

Prepackaged andengineereed controlsolutions:

Induction, two-speed,synchronous, reversing,or wound rotor control5kV, 7.2kV or 15kV to30,000 horsepower

3, 10 or 20mW classpower electronics

Intelligent control centersand lineupsRetrofits and turnkeymodernizationsolutions

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voltage control centers and coordinated lineups tomeet your specific motorcontrol requirements.

Benshaw can perform powersystem studies and detailedanalyses of your machine, motor,system and control configurationrequirements, on request, todetermine the optimum controlsolution for your soft startapplication. Installation, commis-sioning, control retrofits andturnkey modernization programsare also available.

will shorten yourcommissioning times,improve motor perform-ance, enhance protection,simplify diagnostics andstreamline many electricalsystem monitoring andmaintenance tasks.

Engineered solutions

Benshaw’s family of mediumand high voltage starters solve avariety of heavy duty applications.If the job calls for induction,synchronous, two-speed, reversingor wound rotor motor control—5, 7.2 or 15kV—to 30,000HP,Benshaw offers a rugged,reliable solution.

◆ MX3 soft start technology◆ NEMA 12/3R enclosures◆ Dual-redundant design

◆ Fiber optic firing◆ Service entrance labeled◆ Built-in self test (BIST) for

“quick commissioning”

◆ Load break disconnect

All ofBenshaw’s starters

include integratedcontrol and power elec-

tronics, bypass and isolationcontactors, and a myriad of user-friendly, user-selectable features.

On-board metering, real-timedata displays, ModBus communi-cations and integrated motor,load and power quality faultprotection are standard.

Engineered solutionsfor any application

Benshaw designs and man-ufactures application-specificcontrols and custom-configured,intelligent, medium and high

MXMX3 Mission critical reliability …

Benshaw motor controlsstart and protect many differentmotors in many industries, butwe’re particularly well knownfor rugged, reliable performancein severe duty, continuousprocess applications.

We design our products fordurability, and we test themrigorously to ensure the highestdegree of reliability.

That’s why, when it absolutelyhas to work, it absolutely hasto be Benshaw.

Benshaw’s medium and high voltage solid statecontrols offer proven performance, with a track recordof mission critical reliability in the most demandingcontinuous process applications.

With more than 5,000 unitsoperating in over 40 countries,Benshaw has more experience inmission critical motor controlapplications than any othercompany in the world.

We manufacture an extensiverange of medium and highvoltage control solutions … fromdual redundant, web-stockedmedium voltage solid statestarters to engineered, built-to-order controls and highlyspecialized, application-specific,control packages—for 3, 10 and20mW class applications.

When it absolutely has to work,it absolutely has to be Benshaw.

Application experience

◆ Pumps◆ Fans and blowers◆ Crushers/hydra pulpers◆ Mixers and refiners◆ Conveyors◆ Ball/hammer/rolling mills◆ Compressors◆ Chillers◆ Centrifuges

In any configuration …

Industry experience

◆ Power generation◆ Chemical processing◆ Pulp and paper production◆ Oil and gas production◆ Municipal fresh and waste

water treatment◆ Aggregate and mining◆ Cement production◆ Steel and aluminum

Fixed-mount circuitbreaker MTM

Upright skidmounted

Low profile skidmounted

Protective relaysand PLC logic

20MW, 13.8KVMotorcontrol centerwith power factorcorrection

MX

Solid state soft start advantages …

Electrical benefits

The advantages of Benshaw’ssolid state control technology areparticularly important whenprocess conditions create varyingload demands on a motorduring startup.

For example, with competingtechnologies a loaded motor willrequire more inrush current—over a longer period of time—toachieve the torque needed tobegin moving a load. During thattime, circuits can trip and motoroverheating may occur—placingsignificant demands on yourpower distribution system.

In contrast, Benshaw’s patentedMX3 soft start technology rampsvoltage to the motor in a smooth,stepless manner, eliminating

Benshaw’s MX3 based solid state starters offersuperior performance when compared to any electro-mechanical starting technology.

For most applications,Benshaw’s solid state startingtechnology offers importantperformance advantages overother starting techniques.

◆ Lower acquisition andoperating costs

◆ Stepless torque control◆ Precise control over starting

and stopping times◆ Less mechanical stress on

drive train components◆ Extended motor life◆ Fewer power distribution

problems

Cost benefits

Solid state starters typicallycost less than competing reducedvoltage motor starting techno-logies, but they also offeroperating cost advantage byhelping to lower energy costsand by reducing wear on motors,drive train components anddriven machinery.

Benshaw’s solid state soft starttechnology provides precise,stepless control over motorstarting voltages (torque), whichresults in smoother accelerationof the motor, reduced shockloading to the drive train andmachinery, and better control ofmotor inrush currents.

Benshaw’s solid state startersalso provide superior built-inprotection for your motorand machine.

Intelligent motor control

Benshaw’s intelligent MX3

based medium and high voltagecontrols provide—as standard—a level of advanced functionalitynot available with traditionalmotor starters or competitivecontrol equipment:

◆ DC injection braking◆ Motor heater control◆ Anti-windmilling◆ Patented slow speed

Cyclo converter ramp◆ Phase controller◆ Current follower◆ ATL bypass◆ Precise SCR firing

excessive inrush currents,expensive voltage surges, over-heating and the damaging effectsof a sudden, stressful start.

Additional electrical benefitsinlcude.

◆ Reduced supply linevoltage drop

◆ Compliance with utilitycompany starting restrictions

◆ Elimination of oversizedgenerators

◆ Fewer branch circuitprotection trips

◆ Improved power quality◆ Reduced rotor and stator

stress◆ Extended motor life

Mechanical benefits

Benshaw’s MX3 technologyallows different starting ramps tobe programmed for loaded andunloaded conditions, providingmaximum soft start efficiencyin any situation.

◆ Reduced shock to motors,machinery, drive trains, loadsand the manufacturing process

◆ Reduction of transientaccelerating forces that canresult in damage to belts, endpulleys, gearboxes and chains

Process benefits

◆ Fewer process disruptionsresulting from a restart in mid-process (while product isloading the system)

◆ Reduced material damage◆ Reduced downtime◆ Increased productivity◆ Longer system life◆ Prevention of catastrophic

system failures

MX

Solid state switched capacitance …

to variable frequency drives(VFD), reduced voltage auto-transformers (RVAT), reducedvoltage solid state (RVSS) and fullvoltage (FV) starting can beobserved graphically inFigure 2.

Variable frequency drives canstart almost all motors andconnected loads at 1.0 per unitcurrent whereas RVATs (reducedvoltage auto-transformers) andRVSS (reduced voltage solidstate starters) require a higherper unit current—although notas high as with full voltagestarting. MX3 Fusion TechnologySCS (switched capacitance sys-tems) result in further reductionof per unit starting current, toless than that of an RVAT.

Using MX3 technology, Benshaw can also incorporateswitched capacitance to further reduce the demand onyour power distribution system.

Using MX3 technology,Benshaw integrates a modularswitched power factor correctioncapacitor bank with a RediStart™medium voltage soft starter tofurther reduce the VAR demand(and therefore the current) on thedistribution system voltage bus.

MXMX3

This technology, known asMX3 Fusion, reduces the startingcurrent on the supply systemresulting in an increase in themotor bus voltage. This is graphi-cally depicted in Figure 1, amotor start comparison graph ofvoltage versus time.

MX3 Fusion

The MX3 control platformprovides precise control overcapacitance, switching in andout of the system as needed tolower per unit current demandon the utility.

The effect of reducing the perunit current and a comparisonof the MX3 Fusion technology

0.0

1.5

3.0

4.5

6.1

7.6

9.1

10.6

12.2

13.7

15.2

16.7

18.2

19.8

21.3

22.8

24.3

25.9

27.4

28.9

30.4

32.0

33.5

35.0

36.5

38.0

39.6

41.1

TIME (SECONDS)

0.850

PR

IMA

RY

VO

LTA

GE

, PU

KVA

R A

PP

LIE

D, P

HA

SE

0.875

0.900

0.925

0.950

0.975

1.000

1.025

1.050

-100

100

300

500

700

900

1100

1300

1500

KVARAPPLIED

VOLTAGE WITHOUT CAPACITANCE

VOLTAGE WITH CAPACITANCE

ALL MOTOR CONTROL METHODS

PE

R U

NIT

MO

TO

R C

UR

RE

NT

0.0

1.0

2.0

4.0

5.0

3.0

6.0

VFDSCSRVSSRVATFV

FIGURE 1. Motor start comparison with and without capacitance.

FIGURE 2. Starting current comparison.

MX3

MX

Next generation,patented MX3 technologyforms the backbone ofBenshaw’s entire line ofintelligent medium and highvoltage motor controls.

With fiber optic firing,enhanced programmingcapabilities, ease of use, anda unique, flexible architecture—MX3 based controls deliverunprecedented functionalityand all of the rugged, depend-able performance you’vecome to expect from theworld leader in solid statemotor controls.

Dual redundancy

For mission critical motorcontrol and applications,Benshaw can provide switchselectable dual redundancy tokeep your continuous processapplication online in theunlikely event of a primarystarter failure.

Fiber optic firing

Benshaw’s MX3 based controlsutilize an embedded, robust fiberoptic firing technology foroptimum isolation of low andhigh voltage starter circuits. TheMX3 fiber optic firing moduleis immune to AC line sag, permit-ting continuous monitoring ofan “intelligent” power pole andsafe, reliable SCR control.

Additionally, Benshaw’s preciseSCR firing technique guarantees asymmetric waveform and elimi-nates any composite of DCcurrent flow to the motor.

And next generation MX3 control technology.

All hardware,software,

sensors and accessories are designed

and built to work as a single, integrated system,eliminating coordination andperformance issues inherentin systems compiled fromdissimilar, third partycomponents.

With a comprehensive setof standard hardware features,hundreds of available engin-eered components and dozensof software selectable functions,Benshaw’s family of mediumand high voltage controls canbe configured to provide peakmotor performance andcomprehensive protectionfor any motor, serving anyload, in any industry.

◆ Dual ramp selection◆ Adjustable kick current◆ Programmable decel modes◆ MV built-in self test (BIST)◆ Voltage ramp◆ Current ramp

- Adjustable initial current- Adjustable max. current- Adjustable ramp time

Patented soft start functionality:

Integrated electronic protection:

◆ Motor thermal overload◆ Independent starting and

running OL’s◆ Up to speed timer exceeded◆ Low line voltage◆ Low line frequency◆ High line frequency◆ Phase reversal◆ Phase loss◆ Instantaneous overcurrent◆ Overcurrent

◆ Undercurrent◆ Current imbalance◆ Residual ground fault◆ Zero sequence ground fault◆ Shorted or open SCR◆ Disconnect fault◆ Inline contactor fault◆ Control power low◆ Stack over temperature◆ Motor PTC input◆ RTD modules

Real-time metering and diagnostics:

◆ ±3% accuracy◆ Average current◆ L1 current◆ L2 current◆ L3 current◆ Current imbalance %◆ Ground fault current◆ Average volts◆ L1 - L2 voltage◆ L2 - L3 voltage◆ L3 - L1 voltage◆ Overload %◆ Power factor◆ Watts◆ VA◆ VARS

◆ KW hours◆ MW hours◆ Phase order◆ Line frequency◆ Analog input◆ Analog output◆ Run time - days◆ Run time - hours◆ # of starts◆ TruTorque %◆ Power %◆ Peak starting current◆ Last starting duration◆ RTD temperatures◆ Real-time clock

◆ TruTorque ramp- Adjustable initial torque- Adjustable max. torque- Adjustable ramp time

◆ Power ramp- Adjustable initial torque- Adjustable max. torque- Adjustable ramp time

◆ Linear/tach feedback control◆ CYCLO converter control

8 digital inputs configurable to:◆ Stop◆ Fault◆ Fault reset◆ Bypass/inline confirmation◆ OL reset◆ Local/remote selection◆ Heater enable◆ Heater disable◆ Dual ramp selection◆ 1 dedicated start input◆ Disconnect◆ Slow speed◆ Brake enable/disable

6 relay outputs configurable to:◆ Faulted◆ Running◆ Up to speed◆ Alarm condition◆ Ready condition◆ Locked out◆ Over/under current◆ OL alarm◆ Shunt trip◆ Ground fault◆ Energy saver indication◆ Heating indication◆ Slow speed forward/reverse◆ DC braking◆ Cooling fan

1 analog 4-20MA / 0-10VDCinput configurable to:◆ Trip high/low level

1 analog 4-20MA / 0-10VDCoutput configurable to:◆ Current (0–200%/0–800%)◆ Voltage (0–150%)◆ OL (0–150%)◆ KW (0–10 KW/0–100 KW)◆ MW (0–1 MW)◆ Analog input (0–100%)◆ Firing (0–100%)◆ Calibration

Expanded integrated I/O:

MX

Patented soft start technology …

Cyclo™ converter control

MX3 based controls also featureBenshaw’s patent pending CycloConverter Ramp, a high perform-ance algorithm that providescontinuous low operating speedsof three phase AC motors. CycloConverter action rotates threephase AC motors with control ofthe stator current—at speeds lessthan the rated synchronous speedof the motor. Cyclo ConverterControl can be used in conjunc-tion with a standard three-phase,SCR-based soft starter.

The advantages over other “softstart” techniques include:

◆ Low speed motor rotationis accomplished without anyadditional hardware

◆ Peak phase currents arereduced when compared withother jogging techniques

◆ Motor heating is minimized

Selectable starting modes

High-performance MX3 basedcontrols provide soft start, softjog and soft stop capabilitythrough a variety of built-in,selectable ramps … allowing youto choose the optimum startingmethod for any application.

◆ Voltage ramp◆ Current ramp◆ TruTorque™ ramp

◆ Cyclo™ converter ramp

◆ KW ramp

◆ Linear/tach ramp

◆ Dual ramps

◆ Adjustable kick currents

◆ Full voltage

TruTorque™ control

TruTorque™ is Benshaw’sunique, closed loop, sensorlessmethod for precision acceler-ation and deceleration of motorsand driven machinery.

In TruTorque™ mode, yourBenshaw starter can automatic-ally compensate for the actualsystem voltage and load condit-ions at any time, providingfor smoother acceleration anddeceleration cycles, whileminimizing the stress that canresult from torque spikes onpumps, belts, couplings andmachinery.

TruTorque™ technology alsoreduces the peak power (KW)demand of your medium andhigh voltage motors during eachstart-up cycle, which can loweryour energy costs.

MX3 technology allows for precise, application-defined configuration of Benshaw motor controls …

All of Benshaw’s medium and high voltagecontrols offer comprehensive on-board protection …

Standard protection features

◆ Motor thermal overload◆ Independent starting and

running OL’s◆ Up to speed timer exceeded◆ Low line voltage◆ Low line frequency◆ High line frequency◆ Phase reversal◆ Phase loss◆ Instantaneous overcurrent◆ Overcurrent◆ Undercurrent◆ Current imbalance◆ Ground fault

(residual or zero sequence)◆ Shorted SCR◆ Disconnect fault◆ Inline contactor fault◆ Control power low◆ Stack over temperature◆ Motor PTC input

Integrated electronic protection …

Benshaw solid state controlsprovide a comprehensive set ofonboard, programmableprotection features, includingmotor/load fault protection,power quality protection, poweroutage ride through andpermissive start protection.

High-speed sampling, integratedvoltage and current sensingcapabilities, and pre-programmedalgorithms allow you to selectthe precise overload curve andprotection feature set needed tomeet the requirements of yourindustry and application.

Protect machinery fromfailure and excessive mainte-nance caused by mechanicalshock during starting or stoppingwith Benshaw’s smooth, steplessacceleration and controlleddeceleration ramps.

Protect electrical systemsfrom disruptive voltage dropsand power outages caused bymotor locked rotor inrush currentwith precision control of thecurrent ramp during startup.

Protect mission critical motorsfrom failure or an unscheduledoutage caused by machine orelectrical system faults. BenshawRediStart MVRMX starters pro-vide complete, coordinated linemonitoring, high performancemotor control and comprehen-sive protection.

MX

Real-time metering and diagnostics …

Onboard metering

◆ Average current◆ Peak starting current◆ L1, L2, L3 current imbalance◆ Last starting duration◆ L1, L2, L3 voltages◆ Average volts◆ Ground fault amps/

residual◆ Overload %◆ Power factor◆ Watts◆ VA◆ VARS◆ KW hours◆ MW hours◆ Phase order◆ Line frequency◆ Analog input/output◆ Run time - days/hours◆ # of starts◆ TruTorque %◆ Power %

Embedded digital meters, pro-grammable alarms, outputs,revolving events and communi-cations are presented in straightforward messages that providecomplete visualization of thereal-time status and prior eventsto support machine operatorsand maintenance personnel.

Built-in diagnostics

◆ Event log◆ Fault log

- Pre-fault voltage- Pre-fault current- Time- Date

◆ Time and date stamp◆ Built-In Self Test (BIST)◆ Door-mounted and

remote keypads◆ Onboard LEDs◆ Fault classes

MX3 technology provides full visualization of real-timemotor status and prior events to support operators andmaintenance personnel.

Benshaw controllers calculate,analyze and present monitoringand diagnostics data in plainEnglish displays to ensure thatoperating and maintenancepersonnel have real-time visibil-ity of motor, load and powersystem conditions at alltimes.

MX3 based medium and highvoltage starters from Benshawinclude an integrated Modbus/RS485 communications port asstandard. Additional commu-nications protocols are supportedthrough optional communi-cations bridges for simple, plug-and-play networking:

◆ Modbus/RS485 (standard)◆ Profibus DP◆ Ethernet/ModBus TCP

◆ DeviceNet

◆ Lon Works

Expanded communicationsoptions simplify remote monitoringand connection of Benshawcontrols to your network.

Expanded communications.

MVRXE dual redundant prepackaged solutions …

RediStart™ prepackaged, dual redundant solidstate starters provide reduced voltage starting fornormal operation and full voltage emergency back-upstarting for mission critical applications.

Benshaw’s RediStart™ pre-packaged dual redundant solidstate starters are microprocessorcontrolled reduced voltagestarters for three phase inductionmotors. These starters provideclosed-loop soft start control forsmooth stepless motor accelera-tion, and emergency full voltageback-up starting capability, ifrequired. They are supplied in arugged, free-standing NEMA12 enclosure.

Each enclosure consists oftwo distinct compartments;

the medium voltage (powerpole) section is located in themain body of the enclosure, andthe low voltage section contain-ing control logic is locatedbehind the door in an isolatedcompartment.

Prepackaged medium voltagestarters are supplied with a loadbreak isolation switch, Class “R”motor fuses, inline vacuumcontactor, solid state power poles,and a vacuum bypass contactor,which is used to bypass the SCRpower poles once the motor isup to full speed.

MX3 control technology

Benshaw’s powerful MX3

controls provide precise, user-selectable digital starting andstopping capabilities, motor

protection, metering, diagnosticsand communications. It alsoprovides the circuitry requiredto drive the power semi-conductors, which are locatedin the power section.

All RediStart™ prepack-aged medium voltage controlsprovide solid state reducedvoltage starting for normaloperation and full voltageemergency back-up starting—with complete electronic motorprotection—at the flip of aswitch. This unique, dualredundant design is ideal formission critical applicationswhere downtime is extremelydisruptive and cannot betolerated.

� Web

stocked

Ratings:

2,300V to 1,500HP4,160V to 3,000HP

Every Benshaw

solid state starter is

guaranteed for three

full years.* Other

manufacturers limit

their warranties to

just one year. But at

Benshaw, we believe

that since we build

them better, we

can guarantee them

longer. That’s “the

Benshaw Promise.”

*With factory startup.

◆ NEMA 12, dual redundantsolid state starer

◆ Benshaw MX3 controller◆ 45/60KV BIL◆ 8,000 PIV – UL347 certified and

listed at 2.4KV◆ 12,000 PIV – UL347 certified

and listed at 4.2KV◆ 200MVA (2300VAC) / 350MVA

(5000VAC) short circuit faultrated

◆ 500% - 30 seconds rated◆ Service entrance labeled◆ Built-In Self Test (BIST) for

“quick commissioning”◆ Fiber optic firing◆ Selectable solid state or full

voltage operation via selectorswitch mounted inside the lowvoltage compartment

◆ 400A load break, 5KV rateddisconnect switch, withviewing window, groundingassembly and lockablehandle mechanism

◆ Load matched Class R fusingwith blown fuse indication

◆ Fixed mounted, start dutyrated vacuum contactors forisolation and SCR bypass,wired for normal bypass opera-tion and full voltage startoperation, with (2) N/O and(2) N/C auxiliary contact.

◆ Separately mounted “SPE”series overload device

◆ 120VAC, 1000VA CPTwith primary and secondaryfusing

◆ Door-mounted start/stop/reset pushbuttons,LCD keypad andlocal-off-remoteswitch

◆ Terminal stripincluded forremote start/stopcontrol and up-to-speed indication

◆ Modbus comm-unications

RediStart MVRXE key features:

MOTOR CONTROL & ANY AUTO BENSHAWPROTECTION FUNCTIONS TRANSFORMER MVRXE

Reduced voltage start YES YES

Soft start NO YES

Soft stop NO YES

Full voltage bypass starting NO YES

Load break disconnect switch NO YES

Built-in self test NO YES

UL 347/service entrance rated NO YES

3 year warranty NO YES

Plain English digital display NO YES

Electronic overload protection NO YES

Electronic power quality monitoring NO YES

Digital metering NO YES

Plain English diagnostics NO YES

Embedded Modbus RS485 NO YES

Incoming line landing pad NO YES

Integrated control and protection NO YES

UL zero sequence ground fault NO YES

Space saving design (in.) 92h x 54w x 36d 92h x 36w x 30d

Benshaw MVRXE -vs- any autotransformer

ISO 9001 certifiedEngineered solutions plus global compliance …

MACHINEANALYSIS

STRUCTURED ENGINEERING PROCESS

Benshaw’s ISO 9001 certified engineering process andproduction system delivers engineered solutions preciselymatched to your requirements—with guaranteed qualityand global compliance to any standard you specify.

Benshaw provides customengineered systems designed tocustomer requirements and ISO9001 certified quality by payingattention to the details right fromthe beginning. Benshaw startsby understanding the customer’smachine—the load that the motoris operating. Understanding themachine load, particularly duringstart, is a critical first step towardsan engineered solution. Often,Benshaw can assist by suggestingoptimal motor characterisiticsrequired for a satisfactorydesign solution.

Whether the motor is induction,wound rotor or synchronous,Benshaw has the technicalexpertise to understand howthe motor will perform duringstarting with a solid state reducedvoltage motor starter.

Combining the motor, the drivenload and the starter together topredict the performance of thecombination of the componentparts as a system is the next stepin the process. When the effect ofstarting such a system is criticalto the utility supplying power tothe system, Benshaw understandsall of the details and can predictperformance of the system andthe effect on the utility powersource. The result is detailedsystem requirements and motorstarter settings for the system.

MOTORANALYSIS

SYSTEMSANALYSIS

MECHANICALPACKAGING

ENGINEEREDSOLUTION

Whether the mechanicalrequirements are per detailedspecifications or through detailedonsite engineering meetings, theengineering methods are thesame. The result is a predictableengineering solution.

Mechanical packaging is afunction of not only therequired components to get themotor and driven load up andrunning, but also manufactur-ing the motor starter so that itfits the size or site requirements.

Solid state reducedvoltage starters

◆ Standard induction◆ Synchronous◆ Wound rotor◆ P.A.M. motor

Full voltage starters

◆ Standard across the line◆ Smart across the line

Configurations

◆ Two speed◆ Reversing◆ Multiple motor◆ Combination and non-

combination◆ Mining duty skid

mounted◆ NEMA 1, 12, 3R

enclosures

Intelligent motorcontrol centers

◆ Coordinated lineups◆ Incoming sections◆ MTM arrangements◆ Feeder switches◆ Communications

Our machine, motor, systems andpackaging analysis for a customer’soil refinery catalytic cracker resultsin the world’s first 15KV 22,000HPsolid state starter:

Precision systems analysis …

MXBenshaw can custom configure intelligent, MX3-based motor control centers and lineups to meet thecontrol needs of any load … in any industry.

With a firm understanding ofthe objective (or technical con-cern—such as utility voltage sagor motor bus voltage sag),Benshaw’s engineering analysisstarts with gathering systeminformation either by e-mail,phone conversation or asite visit.

Once the pertinent informationis available, a motor startinganalysis is performed usingBenshaw proprietary engineeringsoftware. Using motor inertia,speed torque curves, motor dam-age curves and load data, anoptimum safe current startingprofile is generated using propri-etary computer software programsdeveloped by Benshaw based uponyears of engineering experience.

In order to correct for systemvoltage drop, power factor correc-tion capacitors can be used tocompensate for reactive powerdemanded by the motor.

Further detailed engineeringsimulations are completed usingadditional software such as EMTPto assure that there are no othertechnical issues to resolve. This isparticularly important whenusing power factor correctioncapacitors on the motor bus.

The control topology is selectedas determined by the application(such as TruTorque™ for pumps,current ramp for fans and KWcontrol for generators) in con-junction with the customer’smain objective. Once the motorstarting time and maximumcurrent is determined, a systemvoltage drop analysis is per-formed to determine the sag onboth the utility and the motorbus. MATHCAD® worksheetsbased upon sound engineeringfundamental principles allowprecise engineering calculationsto be performed based upon thesystem topology. Further dataintegrity checks are performed toassure that the power system,motor and load data look reason-able from a technical viewpoint.

Applications specialists atBenshaw are available to helpyou evaluate current and futurecontrol system requirements anddevelop a sound strategy forretrofit, upgrade or replacement.And when you’re ready to makea move, Benshaw can followthrough with a complete design,production, installation andtesting package.

Whatever your control needs,Benshaw’s engineering teams andapplication specialists can helpyou find a cost-effective,reliable solution.

Synchronous motor solidstate starters◆ Soft start stator control◆ Synchronous speed

monitoring packages◆ Solid state DC field excitorSynchronous motor DCpositioning controls◆ Integrated synchronous

motor starter◆ Solid state positioning controlTwo-speed/P.A.M. motor starters◆ Solid state starter◆ Vacuum contactors for

speed changingReversing motor starters◆ Solid state starter◆ Vacuum contactors for

motor reversingWound rotor motor starters◆ Solid state starter◆ Rotor resistors, shorting

contactors and interface

From application-specific motor and machine controlsto precision systems analysis, Benshaw is your source forcustom control solutions.

Application-specific controls …

Capacitive start/switchingcontrols◆ Solid state starter◆ Capacitor banks, switching

contactors, power monitoringdevices

Multiple motor starting◆ Solid state starter◆ Individual motor

protection15KV class solid state starters◆ 10,000, 11,000, 13,000 volt

nominal operating voltagesto 30,000 horsepower

◆ Combination or non-combination configurations

◆ Standalone or motor controlcenter lineups

◆ Custom enclosures andtransition sections

MX

MX

Benshaw can custom configure intelligent, MX3 basedmotor starters, complete control centers and lineups tomeet the needs of any load … in any industry.

Incoming sections

◆ Main breakers or disconnects◆ Main-Tie-Main arrangements◆ Main lug only sections◆ 1200 / 2000 / 3000 amp

circuit breakers◆ 400 / 600 / 1200 amp load

break fault make disconnects◆ Surge protection devices◆ Metering and communi-

cations

Custom configured multipleunit MCC lineups

◆ Transition sections to thirdparty equipment

◆ 800 / 1200 / 2000 / 3000 amphorizontal bus

◆ Reduced voltage / full voltage/ feeder controls

◆ Back to back construction

Intelligent MCC integration

◆ Easy MCC networking◆ MTMS, disconnects, feeders,

SSRV, ATL, PAM, 2 speedstarters

◆ Diagnostics andcommunications

◆ Intelligent SSRVS powerpoles

MX3 Intelligent motor control centers, lineups …

Integrated supervisorycontrol and predictive mainte-nance systems

In applications requiringthe coordination and controlof multiple RediStart™ startersand third party equipment,Benshaw has the experienceand technology to designand deliver integrated controlsystems:

◆ PC-based systems◆ Local area networks◆ Local/remote communications

and control◆ Data collection and

monitoring◆ PLC design, programming

and integration◆ Online and offline predictive

maintenance

And main-tie-main arrangements.

Packaged electrical andcontrol systems

Benshaw can also designand manufacture completelypackaged portable or stationaryelectrical systems for applica-tions requiring self-containedmodules, including:

◆ 20- or 40-foot containers◆ Self-contained air

conditioning and lighting◆ Low and medium

voltage equipment◆ Remote monitoring

and control◆ Personnel and support

facilities

FIXED MOUNTCIRCUITBREAKERMTM(only 48” deep)

DRAW OUTCIRCUIT BREAKERMTM with (6) 5KV solidstate starters

FUSEDDISCONNECTMTM 7.2KVmotor controlcenter withintegratedpower factorcorrection

48" spacesavings vs.typical 96"competitiveunit

WWW.BENSHAW.COM

BENSHAW Inc.World HeadquartersGlenshaw, PA

BENSHAW Inc.Plant 2 ManufacturingGlenshaw, PA

BENSHAW CanadaCanadian HeadquartersListowel, ON.

BEN-FabCustom FabricationWaterloo, ON.

BENSHAW WestWestern OperationsScottsdale, AZ.

BENSHAW PuebloTrane DivisionPueblo, CO

BEN-TechIndustrial AutomationRochester Hills, MI

BENSHAW High PointEPC DivisionHigh Point, NC

RediStart and Benshaw areTrademarks of Benshaw Inc.

Copyright 1998 Benshaw, Inc.All rights reserved.

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1659 East Sutter RoadGlenshaw, PA 15116Phone: (412) 487-8235Fax: (412) 487-4201

Suite 60014715 North 78th WayScottsdale, AZ 85260Phone: (480) 905-0601Fax: (480) 905-0757

EPC Division645 McWay DriveHigh Point, NC 27263Phone: (336) 434-4445Fax: (336) 434-9682

CSD Division5821 Rangeline Road Suite 202Theodore, AL 36582Phone: (251) 443-5911Fax: (251) 443-5966

Trane Division1 Jetway CourtPueblo, CO 81001Phone: (719) 948-1405Fax: (719) 948-1445

550 Bright Street EastListowel, ON N4W 3W3Phone: (519) 291-5112Fax: (519) 291-2595

BENSHAW Canada West4351-104 Avenue SE, Bay #3Calgary, AB T2C 5C6Phone: (403) 873-1539Fax: (403) 873-1579

BCAM-06-005-03