product overview - powerflex 7000 family of drives

AgendaIntroductionTopologyRectifier OptionsFeatures and BenefitsA, B, and C Frame Overviews

Listen. Think. Solve.We spend a lot of time listening to customers to understand:their goals in applying Medium Voltage Drivesthe problems they want to solve or avoidthe performance/attributes they expect in the Medium Voltage Drives they purchase

Listen. Why Change?Why dont customers just continue using traditional process / motor control methods?Throttling valves for pumpsDampers for fansWound rotor motorsAcross-the-line startingReduced voltage startingDC motors and drivesFluid couplingsEddy current clutches

Listen. Why Use Drives?Our customers want drives for three principal reasons:

To save money by reducing power consumptionTo improve the control over their processTo start large motors on weak distribution systems

Listen. Cost Reduction.SAVE substantial energy costs for variable torque applications (primarily centrifugal fans and pumps) by direct speed controlSAVE energy costs by reducing maximum utility demand chargesINCREASE life of mechanical equipment (due to soft starting) INCREASE life of mechanical equipment by running at slower speedsREDUCE preventative and corrective maintenance costs by eliminating complex mechanical equipmentMINIMIZE equipment costs by increasing functionality of drive system through line synchronization and switching capabilityREDUCE project costs by using standard AC squirrel cage induction motors

Listen. Improved Process Control.IMPROVE motor performance. High breakaway and acceleration torque load requirements are limited only by motor Break Down Torque (BDT)REDUCE system disruptions (by lowering current inrush from 600% to 100-150%)REDUCE motor stress (lower heat, vibration, and transient torques), no limit of starts/hr.IMPROVE process control by infinite speed control IMPROVE process control by direct communication interface (plug-and-play) with supervisory control systemMAXIMIZE uptime by using the PF7000 drives inherent regeneration capability to reduce conveyor, fan, or other high inertia stopping times.MEET environmental compliance requirements. Many SCR / RTO pollution control equipment require the use of a VFD to operate optimally.

Listen. Starting Large Motors.Plants may be located in remote areas: May be at the end of the electrical distribution systemVoltage dips when large motors are started (600% locked rotor current), causing related disruptions throughout the plantThe electrical utility may also impose restrictions or penalties to control maximum demand and power factorChallenging Applications:MV motors typically have much lower starting torque (%) than LV motors, making traditional full voltage or reduced voltage starting difficult or impossibleFans tend to be very high inertia loads (several times the NEMA standard)Long across-the-line starts leads to excessive motor heatingConveyors, mills, etc. require higher-than-normal starting torquesSome applications require load sharingThe Solution:MV drives are the singular solution to provide the highest starting torque with the lowest line current requirement

Listen. What Customers Want.Our customers want the following attributes in their drives:

Reliability. MV Drives often run the most critical applications in the plant. Maximum uptime is absolutely required.

Compatibility.Power System: MV Drives must be able to be added into the distribution system without causing disruptions due to harmonics.Motors: MV Drives must be able to run existing motors for retrofit projects or be able to use "standard, non-inverter duty motors.

Ease of Use.MV Drives must be easy and quick to install, start-up, maintain and repairMV Drives must be easily integrated into the supervisory control system

Listen. What Customers Want.Our customers want the following attributes in their drives:

Compact size and weight.Greater ability and flexibility to place MV Drives into existing or new installations

Bottom Line - Lowest total cost of ownership:Purchase costTransportation costInstallation costStart-up costOperating cost

Think.

We started with a clean slate.We challenged all conventional thinking about what was possible with the typical Medium Voltage Drive.Our goal was to build a better MV Drive to better meet the needs of our customers.

Think. How to Meet Customers Needs.We questioned and evaluated everything required to meet the customers needs:What is the best way to maximize the reliability of the design?What is the best way to provide low input harmonics?What is the best way to provide quality voltage and current waveforms to motors?What is the best way to address common mode voltage?How can we reduce installation and start-up time and cost?How can we reduce maintenance and repair time?What is the best way to reduce size and weight?What basic topology best supports meeting these goals at Medium Voltage?A Current Source Inverter (CSI) or Voltage Source Inverter (VSI)?

Think. Reliability.What is the best way to maximize the reliability of the design? proven reliability principles seemed a good place to start:

Minimize the number of power componentsMaximize the reliability of each power componentMinimize the number of connection points between componentsMinimize the effects of a failed power componentProvide the diagnostic ability to predict and prevent failures

Think. Lower Input Harmonics.What is the best way to provide low input harmonics?The traditional method to mitigate harmonics is to introduce a custom, phase-shifting isolation transformer (with multiple three-phase secondary windings) between the distribution system and the drive rectifier. Each secondary winding in the transformer has a corresponding drive rectifier bridge. Some configurations have up to 15 sets of three-phase secondary windings.

Think. Lower Input Harmonics.What is the best way to provide low input harmonics?While in principle, this idea is functional, as the number of secondary windings/rectifier bridges/interconnecting cabling increases the complexity increases greatly and compromises our first goal of increasing drive reliability and introduces other concerns regarding size, weight, installation, and maintenance.We need to look for another answer.

Figure 1 Typical VSI integral isolation transformer usedto mitigate input harmonics

Think. Better Motor Performance.What is the best way to provide quality voltage and current waveforms to motors?A Pulse Width Modulation switching pattern for the drive inverter generally provide good voltage and current waveforms to the motor.One issue with typical PWM waveforms are high dv/dt levels due to the rise time and switching speeds of the semiconductors typically used (IGBTs) in a Voltage Source Inverter VFD. These can severely reduce the life of the turn-to-turn insulation in the motor.Therefore we need to look for another semiconductor.

Think. Address Common Mode Voltage.What is the best way to address common mode voltage?Common to all AC variable speed drives, is the common mode voltage that can reduce the life of the groundwall insulation in the motor.The traditional method of protecting motors against common mode voltage is to provide a ground reference on the drive output to the motor neutral point to tie the motor neutral to ground. The common mode voltage is seen on the input side of the drive. The secondary bridges of the isolation transformer can be insulated to higher levels to protect the transformer against damage from these voltage levels. But this leads us back to more complexity and lower inherent reliability. The VSI topology has no way to address the cause of common mode voltage (common mode current), so we have no other options.We need to find another basic topology.

Solve.

The PowerFlex 7000.

PowerFlex Family of MV DrivesGeneral-purpose stand-alone MV driveControls speed, torque, direction, starting, and stopping of induction or synchronous motorsGlobal productIEC / NEMA / UL / CSA2400-6900 VoltsFocus on high reliability, ease of use, lower total cost of ownershipTarget audienceIndustrial / commercial usersConsultantsOriginal Equipment Manufacturers

PowerFlex Family of MV DrivesIncorporates leading-edge technology, inherently robust and reliable topology, embedded communications, and significant commonality across multiple platforms, networks, operator interface programming and hardware. Air-cooled and Liquid-cooled drivesApplications ranging up to 34,000 HP (25.4 MW).

State-of-the-Art Current Source InverterMany Low Voltage drives use a Voltage Source Inverter (VSI) topologyWhile VSI, and the associated semiconductors, are optimized for low voltage applications, a Current Source Inverter (CSI), with Pulse Width Modulation (PWM), has a number of significant advantages for Medium Voltage (higher power) applications.

Current Source Inverter AdvantagesThe CSI-PWM topology has the following advantages compared to a typical VSI topology:

Simple, reliable power structureeasy to series devicesInherently current limiting tolerant of short-circuit faultsLow component countFuselessInherent regenerationVirtually unlimited cable distances between drive and motor

Current Source Inverter Advantages

Thyristor-based semiconductors (CSI) are ideal for MV applications versus transistor-based semiconductors (used for most VSI) Up to 5X greater reliabilityNon-rupture / non-arc failure modeLower switching speedLower device dv/dtLower on-state and switching lossesLowest Mean-Time-To-RepairInnovative PowerCageTM SGCT inverter switchSCR (for 6P & 18P) or SGCT (for AFE) rectifier switchesExcellent input and output waveforms due to Pulse Width Modulation (PWM) and lower dv/dt

PowerFlex 7000 SGCT PerformanceVSI (IGBT) Output WaveformsCSI-PWM (SGCT) Output WaveformsTypical motor waveforms @ full load, full speeddv/dt = 10 - 50 Volts per microsecondTypical motor waveforms @ full load, full speeddv/dt = 750 -1176 Volts per microsecondVOLTAGENO LOAD CURRENTVOLTAGECURRENT

PowerFlex 7000 - TopologyThe PowerFlex 7000 topology offers a simple, reliable, cost-effective power structure that is easy to apply to a wide voltage and power range. 6500 volt rated power semiconductor devices reduce component count and complexity:Only 6 inverter switching devices are required at 2400V12 at 3300-4160V18 at 6600V.

PowerFlex 7000 SemiconductorsSymmetrical Gate Commutated Thyristor (SGCT) is an ideal switch for Medium Voltage applications.Gate drive close to the device creates low inductance pathmore efficient and uniform gatingLow conduction & switching lossesLow failure rate100 failures per billion hours operation5 X better reliability rating than IGBTsHigh PIV (Peak Inverse Voltage) rating means less components are required.Small, lightweight, and accessible means easy to replaceDouble-sided coolingNon-rupture / non-arc failure mode

The SGCT has the best overall performance and reliability characteristics (per semi-conductor manufacturer statistics)PowerFlex 7000 Semiconductor Comparison

PowerFlex 7000 Rectifier ConfigurationsThere are three standard designs for the rectifier of the PowerFlex drive:

PowerFlex 7000 Rectifier Configurations6-Pulse RectifierA 6-pulse thyristor phase controlled rectifierPassive harmonic filters are optionalSilicon-controlled rectifiers (SCRs) are used for the line converter (rectifier) switches. Symmetrical Gate Commutated Thyristors (SGCTs) and PWM are used for machine converter (inverter) switches.The inverter design is consistent for all rectifier optionsSmallest and simplest topologySuitable for lower HPs, where the connected load is small compared to total plant load.Used with a rectifier duty isolation transformeroptional

PowerFlex 7000 Rectifier Configurations6-Pulse RectifierThe current before the optional filter contains the 5th, 7th and 11th harmonicsThe current after the filter is more sinusoidalharmonics are redirected through the tuned filtersThe tuned filters also serve to improve input power factor to near unity. The total harmonic distortion (THD) of the 6-pulse rectifier and tuned filtersapproximately 5.2% current THD (25% without a filter)approximately 2.6% voltage THD (line-to-line)**THD of line voltage is a function of system impedance.

PowerFlex 7000 - Rectifier Configurations18-Pulse RectifierAn 18-pulse phase controlled rectifierSilicon-controlled rectifiers (SCRs) are used for the line converter (rectifier) switches. Consists of one master bridge and two slave bridgesalways has 18 SCRs, regardless of input voltage. Symmetrical Gate Commutated Thyristors (SGCTs) are used for machine converter (inverter) switches.Indoor (dry type) or Outdoor (oil-filled) isolation transformers are typically used.

PowerFlex 7000 - Rectifier Configurations18-Pulse RectifierThe isolation transformers are available in the following designs:indoor dry type outdoor oil-filledother specialty types are also available Outdoor oil-filled is generally recommended for larger applications for maximum flexibility in dealing with floor space, installation costs, and control room air conditioner loading.

PowerFlex 7000 - Rectifier Configurations18-Pulse RectifierWorlds most common harmonic standards requirements are met in the majority of cases without the need for passive filtersA multi-winding isolation transformer is required to mitigate the low order harmonics by phase shifting principles.The 18-pulse solution is superior to 6 or 12 pulse offerings in terms of lowering line side harmonics. 24 pulse or higher designs have a diminishing reduction in harmonics but require significant more components and complexityThe THD is approximately:5 - 6% current THD2.0% voltage THD (line-to-line)*

*THD of line voltage is a function of system impedanceLine currentLine-to-line voltage at point of common coupling

PowerFlex 7000 - Rectifier ConfigurationsActive Front End (AFE) RectifierAlso known as a PWM rectifierSymmetrical Gate Commutated Thyristors (SGCTs) are used for the line converter (rectifier) switches.SGCTs provide gate-turn-off capability and operate at higher switching frequencies due to integral Gate Driver circuitryPWM with the Selective Harmonic Elimination switching technique is used to eliminate major harmonics, similar to the inverter controlRequires very little filtering of harmonics due to elimination of major harmonics SGCTs are used for machine converter (inverter) switches.

CSI-PWM MV Drive with Active Front EndloadInverterrectifier The rectifier is the same as the inverter

Characteristics of an AFE Rectifier DriveOutput:PWM-CSI with SHE patterns, eliminating 5th, 7th and 11th to rated frequency with switching frequency of 420hzInput:AFE bridge eliminates 5th, 7th, 11th harmonics (SHE pattern)results in low input current THD using 420Hz switching frequencyinput capacitance filtering harmonics above 11th and providing capacitance for reactive power compensation (improved PF)reactor on line side of capacitor isolating the drive from the linecurrent limiting featuresfurther filtering

Control Options for the AFE RectifierSHE eliminating 5th, 7th and 11th harmonics with phase shifting switching frequency is 420Hzeach symmetric switching pattern eliminates one harmonic

Fsw = 420 Hz, (5th,7th & 11th)

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PWM Switching PatternThe Active Front End RectifierTo comply with IEEE 519 while avoiding the use of a phase shifting isolation transformer,the active front end uses the SGCT to produce a PWM switching pattern that prevents the drive from producing high levels of line harmonics.

PowerFlex 7000 - Rectifier ConfigurationsActive Front End RectifierWorlds most common harmonic standard requirements are typically met in every caseThe THD is approximately:4 - 5% current THD1.5% voltage THD (line-to-line)*True input power factor with the AFE rectifier is greater than 0.95 for the typical speed and load range of variable torque loads.*THD of line voltage is a function of system impedanceLine currentLine-to-line voltage at point of common coupling

PowerFlex 7000 Direct-to-DriveDirect-to-Drive TechnologyWhy buy a Drive Isolation Transformer if you dont need one?The PowerFlex 7000 with Direct-to-Drive technology allows you to:connect utility power directly to the drive without an isolation transformer andconnect a new or existing motor directly to the drive, eliminating unnecessary motor filtering

PowerFlex 7000 - Direct-to-DriveWhy Are Isolation Transformers Used Part OneMost Medium Voltage Drive Manufacturers use multi-winding isolation transformers to mitigate unwanted harmonics by phase shifting the transformer secondary windings.Depending on the topology, the transformer can have up to 15 sets of secondary windings. The disadvantage to this method is the high degree of drive complexity, transformer complexity and ever increasing cost, and a very high component count.

Rather than use an Isolation Transformer, the Direct-to-Drive Active Front End uses semi-conductor switching to reduce line current harmonics to levels that comply to the worlds most accepted harmonic standards. The Active Front End is the best method of harmonic cancellation because it does not suffer from complexity and high component count like multi-pulse drive topologies do.

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To Motor

From the dawn of Medium Voltage Drive Technology, man attempted to control harmonics by primitive methods. Examples include large and heavy energy-wasting multi-level phase-shifting transformers that required as many as 53 cables connected to the drive rectifier.

Rockwell Automation has changed all of that with its DIRECT-TO-DRIVE Technology!

PowerFlex 7000 Modern Thinking

PowerFlex 7000 - Direct-to-DriveWhy are Isolation Transformers Used Part TwoManufacturers can use transformers to protect motors from Common Mode Voltage stress.Unless the Common Mode Current is suppressed Common Mode Voltage always exists.Transformers are used to allow the motor neutral point to be connected to ground, but the common mode voltage that would otherwise be impressed on the motor is impressed on the transformer. The disadvantage is the increased transformer and cable insulation required between the transformer to withstand the common mode voltage stress.The main disadvantage is the space requirements and cost of the transformerDirect-to-Drive technology produces almost no common mode voltage so it is suitable for new or existing motors and imposes no stress on the drive input. The advantage of Direct-to-Drive technology over an Isolation Transformer is that no extra insulation is required in the motor, in the motor cables or in the line cables.

Common Mode Voltage ProtectionIn balanced three-phase ac system: The sum of three phase-to-ground voltages is always equal to zeroLoad neutral-to-ground voltage Vn-g is always equal to zero no neutral offsetBalanced: SourceTransmissionLoad

Vn-g = Vag + Vbg + Vcg = 0What is Common Mode Voltage?

Common Mode Voltage ProtectionIn unbalanced three-phase ac system: Load neutral-to-ground voltage Vn-g is not always equal to zero neutral offsetAny imbalance: SourceTransmissionLoad

Vn-g = Vag + Vbg + Vcg 0What is Common Mode Voltage?

Common Mode Voltage ProtectionRectifier or Inverter Operation:Normally only two phases in ac side are connected to dc link section at the same timeVn-g = Vag + Vbg + Vcg 0What is Common Mode Voltage?

Common Mode Voltage ProtectionYellow: Line Vp-gGreen: Line Vn-gPurple: Motor Vp-gPink: Motor Vn-g (5kV/div) at 1200rpmCommon Mode Voltage and Isolation Transformers

Traditional CSI DesignCommon mode current and voltage created in all drives with a DC BusNo common mode inductance with two coil designOnly an input transformer allows drive use with existing motorsAdditional motor common mode insulation required for line reactor drives

The Magic of Direct-to-DriveCSI Active Front End

Eliminating common mode voltage using a choke which adds common mode inductance with additional coils.

Different reactor flux path design for common and differential current.An integrated common and differential dc link reactor eliminates common mode voltage with a transformerless design.

PowerFlex 7000 - Direct-to-DriveDirect-to-Drive TechnologyDirect-to-Drive technology mitigates common mode voltage to levels suitable for existing motors without using an isolation transformer

PowerFlex 7000 - Direct-to-DriveDirect-to-Drive TechnologyAnd, in addition to mitigating Common Mode Voltage, Direct-to-Drive technology does not generate dv/dt or Reflected Wave Voltage Stress on Motors or on the supply.

PowerFlex 7000 - TopologyDirect-to-Drive TechnologyThe simplicity of its design results in a lower initial capital investment, lower operating cost, lower installation cost and lower maintenance cost relative to drives that require isolation transformers.No isolation transformer costNo extra motor insulationNo special line cable insulationNo special motor cable insulationNo shipping splitsNo transformer protection relayNo dv/dt, sine filter or motor terminatorNo power factor correction requiredNo harmonic filtering requiredNo transformer lossesNo transformer air conditioningNo transformer shipping and handling costs

PowerFlex 7000 - Direct-to-DriveDirect-to-Drive TechnologyThe PowerFlex 7000 with Direct-to-Drive technology is typically smaller and lighter that drive technologies that use Isolation TransformersIsolation Transformers represent 30 to 50% of a drive system size and 50 to 70% of the systems weight.

PowerFlex 7000 - Direct-to-DriveDirect-to-Drive TechnologyReduced size and weight means:No interwiring between drive and transformer (for external transformer configurations)No shipping splits in the drive (for integral transformer configurations)No separately shipped power components to install in the drive during installationThis makes the PowerFlex 7000 with Direct-to-Drive the simplest to install.

PowerFlex 7000 Power QualityPowerFlex 7000 Topology OptionsOption 1 - 6 pulse rectifier with optional filtermost economicalideal when VFD is small percentage of total plant loadavailable with transformer or AC line reactorelimination of transformer on new motor applications highest efficiency, smallest footprint, low total cost of ownershipOption 2 - 18 pulse rectifierMeets IEEE 519-1992 Harmonic Guidelines in most casesLow complexity & component count compared to other 18 pulse solutionsseries rectifiersonly 3 secondary windings on transformerOption 3 Direct-to-Drive AFE (Active Front End) rectifierMeets IEEE 519-1992 Harmonic GuidelinesNear unity PF on variable torque loadsOptimum drive performanceAvailable with transformer or line reactorelimination of transformer on all applications highest efficiency, smallest footprint, low total cost of ownership

6 Pulse Rectifier with Optional Filter18 Pulse Rectifier Direct-to-Drive Technology optional

PowerFlex 7000 Power QualityTypical THD of Different Rectifiers6 pulse: 25 - 27%12 pulse: 8 - 10%may meet IEEE 519-199218 pulse: 5 - 6%will meet IEEE 519-1992 in vast majority of casesDirect-to-Drive Technology (with Active Front End): 4 - 5%will meet IEEE 519-1992 in all cases

Note: diode rectifiers (voltage source drives) typically have higher distortion values for each of the pulse numbers shown, due to discontinuous rectifier current, and may require larger input / dc reactance to achieve the same results

PowerFlex 7000 Power QualityTypical THD of Different RectifiersAFE

Lead with the AFE TechnologyProduct MixThe Active Front End configuration continues to dominate sales by a wide marginNo isolation transformerBest harmonic performanceBest input power factor

PowerFlex 7000 Features and BenefitsPowerCageModular power assembliesreduced manufacturing time / costFast change out of power component no special toolsSGCT & gate drive slide out after releasing clamp pressure ( typically < 5 minutes)changing device instead of entire module lowers cost of spare partsHigh efficiency heatsink extrusionimproved heat transfer/reduces thermal stressHouses entire inverter / rectifier phasecommon inverter / rectifier designcompact construction

PowerFlex 7000 - TopologyThe PowerFlex 7000 has the additional benefit of inherent regenerative braking for applications where the load is overhauling the motor, or where high inertia loads need to be slowed down quickly.

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&A

Page &P

Speed f/b

Regenerative Power

Time seconds

Frequency Hz

Perunit

Regeneration on Conveyor Application

TR03tst4

ALLEN-BRADLEY BULLETIN 1557 MVDRIVE

TRENDS98/10/30 16:45:52

DRIVE NAME: COMPANHIA CVRD

SETUP DATA

SAMPLE SIZE:100

POST SAMPLES:95 %

SAMPLE RATE:200 msec

TREND MODE: SINGLE

TRIGGER:Tach feedback< 57.5Hz

TRACE:1 Tach feedback [Hz]

TRACE:2 I stator[pu]

TRACE:3 Torque[pu]

TRACE:4 Speed error [Hz]

TimeSpeed f/bI statorTorqueSpeed error

0580.4460.223-0.01

0.258.10.4590.229-0.19

0.457.80.4270.207-0.54

0.657.60.3960.184-1.13

0.857.30.3690.164-1.4

157.10.3410.144-1.88

1.256.60.3220.127-2.09

1.456.50.290.099-2.61

1.6560.2690.075-3.25

1.855.20.2570.058-3.62

254.30.2610.057-3.86

2.253.90.2420.007-4.63

2.453.10.253-0.011-4.94

2.652.30.25-0.016-5.27

2.851.40.243-0.019-5.44

350.40.239-0.025-5.61

3.249.50.237-0.03-5.8

3.448.40.247-0.041-5.92

3.647.30.251-0.033-5.92

3.846.50.248-0.041-6.24

445.50.258-0.053-6.43

4.244.60.264-0.057-6.59

4.443.30.277-0.062-6.55

4.642.10.273-0.053-6.43

4.841.20.265-0.052-6.64Ramp1

540.40.27-0.062-6.922

5.239.10.291-0.076-6.868

5.4380.279-0.072-6.882

5.636.80.274-0.065-6.83

5.835.80.266-0.063-6.94

634.90.274-0.075-7.16

6.233.90.306-0.101-7.36

6.432.60.299-0.09-7.14

6.631.60.286-0.082-7.27

6.830.40.286-0.081-7.27

729.40.28-0.076-7.32

7.228.30.303-0.098-7.45

7.427.20.304-0.099-7.43

7.6260.292-0.094-7.42

7.824.90.298-0.097-7.39

823.90.3-0.1-7.53

8.222.80.305-0.106-7.6

8.421.50.311-0.109-7.49

8.620.40.305-0.104-7.47

8.819.30.311-0.11-7.59

918.20.306-0.103-7.18

9.217.30.299-0.093-7

9.416.30.291-0.087-6.88

9.615.30.285-0.079-6.52

9.814.30.277-0.066-6.33

1013.30.274-0.058-6.04

10.212.50.263-0.041-6.02

10.411.70.267-0.042-5.8

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147.10.3340.124-1.04

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PowerFlex 7000 Features and BenefitsPowerCageEasy to serviceFront access Component replacement in less than 5 minutesno special tools required

PowerFlex 7000 Features and BenefitsControl Features - Operator InterfaceModified PV550 terminal with specific bootcode and functionality for PowerFlex 700016 line, 40 character LCD displayStart-up wizardprompts user through set-up, operation and trouble shootingBar type LCD meteringspeed loadvoltageAuto tuningTest modesTrending

PowerFlex 7000 Features and BenefitsControl Features - Advanced TroubleshootingThe most recent fault is shown at the top of the list, FIFO.To clear the queue select the CLEAR softkey.

PowerFlex 7000 Features and BenefitsControl Features - Enhanced Fault IdentificationAn additional help feature is provided for some alarms.Use the up/down cursor to select the alarm in question, then press the enter key.If help text is available for the alarm the screen will be similar to:

PowerFlex 7000 Features and BenefitsControl Features - Communication OptionsRockwell Automation has taken a lead with its PowerFlex MV and LV drives. They all offer the same communication options and software tools.

PowerFlex 7000 Features and BenefitsControl Features - Integrated Architecture

PowerFlex 7000 Features and BenefitsControl Features Advanced Protection FeaturesPower Device Redundancy (N+1)

PowerFlex 7000 Features and BenefitsControl Features Advanced Protection FeaturesOvertemperature CompensationDuring an overtemperature condition (due to plugged filters or high ambient temperature, etc.), the drive rectifier changes its gating pattern to reduce the amount of heat generated by the drive. Once the temperature returns to nominal levels the drive automatically switches back to its normal gating pattern.Traditional drive technology would result in the drive going off-line to protect itself from overtemperature.

PowerFlex 7000 Features and BenefitsDrive Performance - Motor FriendlyNear sinusoidal current and voltage @ all speeds and loadsno additional motor heating or voltage stress to insulation compared to sine wave operationCompatible with standard motorsinduction or synchronous motorsno de-rating inverter duty motor not requirednew or retrofit applicationsVirtually unlimited motor cable distancestable operation up to 15 Kmno capacitive coupling or dv/dt issuesQuiet, smooth motor operationHigh quality of current and voltage waveformsLow torque rippleLower switching frequency compared to IGBT drives (no reflected wave issues)

Typical VFD output waveforms @ full load, full speed4160V, 933 kW, 60 HzTop - Motor Current Bottom - Motor Voltage

PowerFlex 7000 Features and BenefitsDrive Performance - Line FriendlyInput waveforms @ full load, full speed Line VoltageLine Current

PowerFlex 7000 Features and BenefitsDrive Performance - Line FriendlyAFE Input Power Factor vs. Output Power

0

0.5

1

1

1.5

Power Factor

power (pu)

Fan load, T = w*w , Cinv = 0.35

Leading

Lagging

PowerFlex 7000 Features and BenefitsDrive Performance - EfficiencyTypical Drive and System Efficiency** Efficiency at full load, full speed

PowerFlex 7000 A Frame PositioningLow end power range, 150-930 kW (200-1250hp)2400 to 6600V nominal supply voltage ratingsAir cooledCompact packaging for smallest footprint requirements Three input configurations for optimum installation flexibility:Base drive with provision for connecting to indoor or outdoor transformerBase drive with integral isolation transformer Base drive with integral line reactor and input starterTwo rectifier types:AFE rectifier (active front end) for low line harmonics, high power factor and commonality of parts Basic 6 pulse rectifier for the lowest cost solution 3 Cables in / 3 cables out for lower installation costs

PowerFlex 7000 A Frame MV DriveControl BoardsIdentical line and machine side control boards used for asynchronous and synchronous drives. Floating point Digital Signal Processors (DSP). Field Programmable Gate Arrays (FPGA) used for advanced logic. External I/O with 16 digital inputs and 16 digital outputs.Operator interface terminal includes 16-line, 40-character LCD display with set-up wizard for easy start-ups, monitoring and troubleshooting.Cable termination cabinet for easy access to line and load cable connection assemblies. Top or bottom entry and exit is available. (Base drive shown) Rugged DC link inductor limits fault current and eliminates nuisance trips.A compact enclosure saves on valuable floor space. Rear access not required

6.5 kV SGCT power semiconductor with integrated gate drive reduces parts count and increases reliability.

Integral cooling fan provides efficient heat transfer from power components.Common PowerCage modules on the rectifier and inverter reduce manufacturing time and allow easy access to main power components. Power devices can be replaced in less than 5 minutes.AFE rectifier (active front end) for low line harmonicsand high PowerFactor. 6 Pulse rectifier also available for low cost solution.Common gate drive power supply module reduces parts count and lowers overall cost

A Frame Configuration # 1Base driveOptimum installation flexibility with provision for connection to indoor or outdoor isolation transformer Compact packaging for smallest footprint requirements (78.74 inches wide @ 2400-4160V, 90.55 inches wide @ 6600V)New or existing motors3 Cables in / 3 cables out for easy installationIntegral cooling fan for VFDLow line harmonics & high power factor ( typical current THD < 5%, PF > 0.95 with AFE rectifier)Fan control power supplied internally( 1 Phase control circuit power supplied by customer, 120V / 60 Hz, 110V / 50Hz, 20 amp.)BaseDrive

A Frame Configuration # 2Base drive with integral isolation transformer

An integrated system solution for fewer connections and reduced installation costs. Small system footprint(94.49 inches wide @ 2400-4160V, 110.24 inches wide @ 6600V)New or existing motors3 Cables in / 3 cables out for easy installationIntegral cooling fans for VFD & transformerLow line harmonics & high power factor( typical current THD < 5%, PF > 0.98 with AFE rectifier)Fan control power supplied internally( 1 Phase control circuit power supplied by customer, 120V / 60 Hz, 110V / 50Hz, 20 amp)IntegralIsolationTransformer

A Frame Configuration # 3Base drive with integral line reactor & input starterElimination of isolation transformer results in lower losses and saved spaceAn integrated system solution for fewer connections and reduced installation costs. New motors only Small system footprint 94.49 inches wide @ 2400-4160V110.24 inches wide @ 6600V3 Cables in / 3 cables out for entire system for easy installation.Integral cooling fan for VFDLow line harmonics & high power factor( typical current THD < 5%, PF > 0.98 with AFE rectifier)Fan control power and control circuit power supplied internally IntegralLine Reactor& Input Starter

A Frame Power Ratings


PowerFlex 7000B Frame

PowerFlex 7000 B Frame PositioningLow and Medium power range, 16.4MW (up to 22,000hp)2400 to 6600V nominal supply voltage ratingsAir cooledSmall footprint for medium power rangeNormal duty or heavy duty service ratings Three rectifier types:AFE rectifier (active front end) for low line harmonics, high power factor and commonality of parts 18 Pulse rectifier for low line harmonics and connection to a high voltage distribution system Basic 6 pulse rectifier for the lowest cost solution 3 Cables in / 3 cables out (6 pulse and AFE rectifier)9 Cables in / 3 cables out (18 pulse rectifier)

PowerFlex 7000 B Frame MV DriveControl BoardsIdentical line and machine side control boards used for asynchronous and synchronous drives. Floating point Digital Signal Processors (DSP). Field Programmable Gate Arrays (FPGA) used for advanced logic. External I/O with 16 digital inputs and 16 digital outputs.Operator interface terminal with 16-line, 40-character LCD display for easy set-up, monitoring andtroubleshooting.Robust AC/DC power supplies withoptional redundancy.Low voltage swing out tub for access to cable connection assembly and motor filter capacitorRugged DC link inductor limits fault current and eliminates nuisance trips.A compact enclosure saves on valuable floor space. Rear access not required

6.5 kV SGCT power semiconductorsreduce parts count and increase reliability.

Integral cooling fan provides efficient heat transfer from power components.PowerCage modules on the rectifier and inverter reduce manufacturing time and allow easy access to main power components for quick replacement.6-Pulse, 18-Pulse, or AFE rectifiers available as standardfor greater flexibility in meeting power quality needs.Common gate drive power supply module reduces parts count and lowers overall cost

B Frame Power Ratings* Based on 4 units connected in parallel


PowerFlex 7000LC Frame

PowerFlex 7000L C Frame PositioningHigh end power range, up to 25.4MW (34,000hp)4160 to 6600V nominal supply voltage ratingsClosed loop liquid cooling system with liquid-to-air or liquid-to-liquid style heat exchangersSmall integrated package for high end power rangeNormal duty or heavy duty service ratingsTwo rectifier types:AFE rectifier (active front end) for low line harmonics, high power factor and commonality of parts 18 Pulse rectifier for low line harmonics and connection to a high voltage distribution system3 Cables in / 3 cables out (AFE rectifier)9 Cables in / 3 cables out (18 pulse rectifier)

Completely Integrated MV Drive PackageControl & Cabling CabinetConverter Cabinet Capacitor CabinetDC Link Inductor CabinetPump CabinetPowerFlex 7000L Liquid Cooled Drive

Copper Chill Block Liquid flow path provides optimum cooling for power devices and snubber resistors Very low R-theta design for maximum efficiency and heat transfer Liquid CoolantHeader Manifold Industrial schedule 80 CPVC piping for pump panel, headers and manifolds No condensation possibility Non pressurized systemEpoxy Resin Power Cage Molding Houses power devices, chill blocks, and clamp head. Eliminates need for clamping rods Easy access for device replacement Quick DisconnectCouplings Isolates power module and eliminates need to drain entire system. Includes integral valve and seal for leak preventionSGCT with IntegratedGate Drive Card 4 devices per phase( 4160V ) 6 devices per phase ( 6600V )Silicone-Based Heat Resistant Coolant Hose multiple ply polyester fabric for maximum strength premium quality for extreme temperature conditions (-65 to +350 Degrees C) Will not sweat Will not interact with coolant

Temperature compensated clamphead assembly Includes calibration nut and tell tale washer Applies compression force to power devices Eliminates need for special tools or force measuring transducers

7000L Inverter/Rectifier Modules

Pumping cabinet Line supply c/w disconnect and fusingClosed loop coolant system liquid ethyl-glycol / de-ionized water mixture low conductivity (1-2 microSiemens / cm) Liquid cooling allows 90% of VFD losses to be expelled to the outside atmosphere via liquid to air heat exchanger with redundant fan or liquid to liquid heat exchanger Isolated from medium voltage Fully serviceable low voltage compartment isolated from MV Monitors coolant temperature, flow, level, conductivity, and pressureDe-ionizer cartridge includes replaceable filter (every 6 months recommended) Strainers on both ends with 1/ 2 turn shut off valves for replacement when drive is operating

Coolant reservoir (Behind LV Panel) includes level sensors with low level warning and trip indication

Low voltage control panel includes metering, transducers, relay logic. Pump Contactors and Overloads

Coolant pumps Redundant pumping system Automatic change over on pump failure 1/2 turn valves with quick disconnect couplers for pump replacement when drive is operating Full drip tray to contain any spilled coolantHeat Exchanger Connection Top / bottom / rear cutout areas for connection to liquid / air heat exchanger Panel space for internal water / water heat exchanger

Drain & fill pump for convenient filling7000L Pump Section

Heat ExchangersLiquid to liquid heat exchangers Installed in drive pump panel Industrial plate type for fast efficient heat transfer 316 Stainless steel design High pressure rated design

Liquid to air heat exchangers Outdoor Industrial rated design For connection to drive pump panel Redundant fans with automatic switch over

C Frame Power Ratings* Based on 4 units connected in parallel


PowerFlex 7000 Family of MV DrivesFred JasonProduct Manager, MV Drives

Author: Fred Jason (Product Manager, MV Drives) Date Created: November 24, 2005 Date of Current Revision: Jan. 3, 2007Audience: Internal and External File Locations: TBDThere are three main benefits for customers using MV drives:1. Reduce Costs2. Improve process control3. Starting large motor on weak power systems

Cost reduction can come from energy savings, lower maintenance costs due to reduced wear & tear on equipment, or from increased life of mechanical equipment

We are starting to see MV drives now be applied to large motors for soft starting only. In some cases the motor power rating is much larger than the drive, since the drive is just sized for starting duty.There are three main benefits for customers using MV drives:1. Reduce Costs2. Improve process control3. Starting large motor on weak power systems






We are starting to see MV drives now be applied to large motors for soft starting only. In some cases the motor power rating is much larger than the drive, since the drive is just sized for starting duty. The PF7000 is a general purpose stand alone MV drive that controls speed, torque, direction, starting, and stopping of induction or synchronous AC motors. It is intended for low-medium performance applications such as fans, pumps, compressors, mixers, conveyors, kilns, fan-pumps, etc. It is not suitable for system applications such as paper machines and rolling mills. (Speed bandwidth will range from 5-25 rad/sec. Torque bandwidth will range from 15-50 rad/sec) The PF7000 is a global product that will adhere to- NEC/ IEC / NEMA / UL / CSA standards - It is available with the worlds most common supply voltages at medium voltage, from 2400-6600 Volts. The design focus is on high reliability, ease of use, and lower total cost of ownership. The drive will be easier to use and provide lower cost of ownership in terms of installation, set-up, operation and maintenance The PF 7000 is targeted at:Industrial / commercial usersConsultantsOEMs

PowerFlex 7000 Family of Medium Voltage DrivesThe Allen-Bradley PowerFlex 7000 Family represents the third generation of medium voltage drives at Rockwell Automation. They incorporate leading-edge technology, embedded communications, and significant commonality across multiple platforms, networks, operator interface programming and hardware. Designed for end users, solution providers and OEMs, PowerFlex 7000 air-cooled and liquid-cooled drives meet applications ranging up to 34,000 horsepower (25.4MW). The PowerFlex 7000 drives are general purpose, stand-alone medium voltage drives that control speed, torque, direction, starting and stopping of standard asynchronous or synchronous AC motors. They are global products that adhere to the most common standards from NEC, IEC, NEMA, UL, and CSA. They are available with the world's most common supply voltages at medium voltage from 2400-6600 volts. The PowerFlex 7000 is available in 3 different frame sizes: The PowerFlex 7000A - 'A' Frame drives are available from up to 1250 hp (933kW). They complement the PowerFlex 7000 MV Drive product line by offering many of the same features and benefits in a much smaller foot print. The PowerFlex 7000 - 'B' Frame drives are available up to 22,000 hp (16.4MW) at the worlds most common supply voltages from 2400-6600 Volts. The PowerFlex 7000L Liquid Cooled - 'C' Frame drives extend the power range of the PowerFlex family of drives up to 34,000 hp (25.4MW). The PowerFlex 7000L offers many of the same benefits as the air-cooled PowerFlex 7000 MV Drive. PowerFlex 7000 drives are also available with a host of Medium Voltage Input, Output and Bypass starters.Why does RA utilize CSI-PWM topology for the third generation MV drive? - - This topology offers a simple, reliable, cost effective power structure that is easy to apply to a wide voltage and power range. Power semiconductor switches are easy to series for any voltage level. -Semi-conductor fuses are not required for the power structure due to the current limiting DC link reactor.-With 6500 volt PIV rated devices, the number of inverter components is kept to a minimum. For example, only 6 inverter switching devices s are required @ 2400V(shown in drawing), 12 @ 3300-4160V, and 18 @ 6600V. -The PF 7000 is inherently regenerative for applications where the load is overhauling the motor, or where high inertia loads need to be slowed down quickly-The PF 7000 utilizes SGCTs (Symmetrical gate commutated thyristors) for the inverter switches and SCRs (6/18 pulse) or SGCTs (PWM ) for the rectifier.Why does RA utilize CSI-PWM topology for the third generation MV drive? - - This topology offers a simple, reliable, cost effective power structure that is easy to apply to a wide voltage and power range. Power semiconductor switches are easy to series for any voltage level. -Semi-conductor fuses are not required for the power structure due to the current limiting DC link reactor.-With 6500 volt PIV rated devices, the number of inverter components is kept to a minimum. For example, only 6 inverter switching devices s are required @ 2400V(shown in drawing), 12 @ 3300-4160V, and 18 @ 6600V. -The PF 7000 is inherently regenerative for applications where the load is overhauling the motor, or where high inertia loads need to be slowed down quickly-The PF 7000 utilizes SGCTs (Symmetrical gate commutated thyristors) for the inverter switches and SCRs (6/18 pulse) or SGCTs (PWM ) for the rectifier.Why does RA utilize CSI-PWM topology for the third generation MV drive? - - This topology offers a simple, reliable, cost effective power structure that is easy to apply to a wide voltage and power range. Power semiconductor switches are easy to series for any voltage level. -Semi-conductor fuses are not required for the power structure due to the current limiting DC link reactor.-With 6500 volt PIV rated devices, the number of inverter components is kept to a minimum. For example, only 6 inverter switching devices s are required @ 2400V(shown in drawing), 12 @ 3300-4160V, and 18 @ 6600V. -The PF 7000 is inherently regenerative for applications where the load is overhauling the motor, or where high inertia loads need to be slowed down quickly-The PF 7000 utilizes SGCTs (Symmetrical gate commutated thyristors) for the inverter switches and SCRs (6/18 pulse) or SGCTs (PWM ) for the rectifier.Positioning the gate drive close to the SGCT in this new design, creates a low inductance path that provides more efficient and uniform gating of the device. As a result, the device is better suited than a conventional GTO to handle the fluctuating levels of voltage and current while it is switching on and off during gating. An SGCT has low conduction and switching losses, low failure rate, and double sided cooling for low thermal stress. The power structure for Rectifier and Inverter are identical:Both are a 6 leg, 6P converter design using a minimum of components. Both converters use SGCTs and similar switching frequencies.Capacitance provides additional filtering of higher frequencies while the SHE pattern eliminates major harmonics. This capacitance also improves drive PF. For a variable torque load the PF will be near unity from approx. 30 - 100% speed.The drive input has an additional line reactor that helps isolate the drive from line impedances and existing harmonic conditions.

For the PowerFlex 7000 PWM Rectifier drive, both the rectifier and inverter are the same 6P configuration and use PWM control.The PWM inverter operates at variable frequency and changes its switching frequency and output pulse pattern. The PWM rectifier operates at a fixed frequency and does not change its pulse pattern. New SGCT technology has allowed higher switching frequencies. For the elimination of each separate harmonic, two sideband pulses are required at specific timing within the PWM waveform. At 420hz switching frequency (formerly 225hz), the 5th, 7th and 11th harmonics are eliminated.The filter created by the LC on the front end of the drive has L and C chosen for a resonant frequency below the 5th harmonic where no system resonances exist. The capacitors will filter the harmonics starting with the 13th. From the rectifier viewpoint, the impedance of the capacitor is much less than the line reactor and line, causing the harmonics to flow into the capacitor.An example of a SHE switching pattern that eliminates the 5th, 7th and 11th harmonic with a switching frequency of 420hz.The minimum pulse width has been decreased over the GTO thyristor with the improvements of the SGCT (lower gate inductance).Each pair of pulses eliminates a harmonic, the timing (phase) relationships between pulses determines which specific harmonic that will be eliminated.For a 50hz system, each pair of symmetric pulses requires an additional 100hz switching frequency. Each pair of harmonics requires 200hz additional switching frequency. What is Direct to Drive?Direct-to-Drive technology is the combination of three innovations that allow the PowerFlex 7000 to operate without an isolation transformer on both new and existing motors: The SGCT, The Active Front End Rectifier and Common Mode Voltage Protection.The Active Front End To comply with IEEE 519 while avoiding the use of a phase shifting isolation transformer, the PowerFlex 7000 with Direct-to-Drive technology employs the Active Front End Rectifier.The active font end uses the SGCT to produce a PWM switching pattern that prevents the drive from producing high levels of line harmonics. IntroductionWhy buy a Drive Isolation Transformer when you dont need one?The PowerFlex 7000 with Direct-to-Drive technology allows you to:connect utility power directly to the drive without an Isolation Transformer and have harmonic compliance and address common mode voltageconnect a new or existing motor directly to the drive without extra motor filtering or specially insulated cablingSo, why do Variable Frequency Drive manufacturers use Isolation Transformers?Why Direct-to-Drive Technology is a Better SolutionCommon Mode Voltage ProtectionDirect-to-Drive technology produces almost no common mode voltage so it is suitable for new or existing motors and imposes no stress on the drive input.The advantage of Direct-to-Drive technology over an Isolation Transformer is that no extra insulation is required in the motor, in the motor cables or in the line cables.There are also several other major advantages. First, the transformerless design of Rockwell Automation's PowerFlex 7000 MV drive, reduces drive system size by 30% to 50%, and drive system weight by 50% to 70%. This design contributes to a lower total cost of ownership with improved system efficiency, by eliminating transformer heat losses, and air conditioning costs to cool the transformer. Second, the ease of use of the PowerFlex 7000 drive, provided by a user-friendly operator interface terminal with an interactive set-up wizard that facilitates fast start-ups, smooth operation and reduced downtime. Third, the patented Power CageTM modules allow for quick replacement of power devices in less than five minutes. Fourth, the modular design - which makes the PowerFlex 7000 MV drives ideal for retrofit applications. Fifth, the ability of the MV drives to offer inherent, 4-quadrant regeneration capability, where LV drives are standard 1-quadrant. The unique PowerCage design means that that the drive is extremely easy to service and maintain by providing front access to all componentsMain power components can be replaced in less than 5 minutes without removing the PowerCage, and without any special tools.To change out an SGCT: Unplug gate leads and fiber optic leads from gate drive board Loosen clamp calibration nut with standard wrench until the SGCT can be removed. Slide out failed SGCT with integrated gate drive Install replacement SGCT with integrated gate drive Re-connect gate leads and fiber optic leads Tighten clamp calibration nut with standard wrench until the belleville washer can be turned with finger tips. Run in LV test mode Reapply MV PowerREFER TO YOUR OPERATING MANUAL FOR DETAILED INSTRUCTIONS.

CommunicationsAn important consideration in the LV verses MV debate is communications. For users, the question is: if I choose an MV drive will it give me the same facilities for integration into factory-wide automation networks as LV drives? LV drives are more commonly associated with the communication interfaces that facilitate factory networks. However, Rockwell Automation has taken a lead with its PowerFlex ranges of LV and MV drives, by ensuring that they all offer the same communication options, and, in addition, employ the same programming and software tools.

With Complete integrated architecture the drive system can be controlled and tuned in many ways . The device net allows for simple communication proto col to all the plant level main drives and the operator can adjust and optimize the system operation with the MMI.

All diagnostic information is done via communicationsCurrent and voltage waveforms to the motor are near sinusoidal, resulting in no additional heating or insulation stress. Temperature rise in the motor connected to the VFD is typically 3 degrees C. higher compared to across the line operation. Dv/dt in the voltage waveform is less than 10 volts / microsecond. The peak voltage that the motor insulation will see is the rated motor RMS voltage divided by 0.707Standard motors are compatible without de-rating, even on retrofit applications. Motor cable distance is virtually unlimited. This technology is capable of controlling motors up to 15 Km away from the drive

Line side current and voltage waveforms are near sinusoidal with 18 pulse or PWM rectifier designs, meeting IEEE 519-1992 harmonic guidelines.(18 pulse waveforms shown)

The PF 7000 typical VFD and system efficiencies are shown. The 6 pulse with line reactor and PWM rectifier with line reactor have the highest system efficiency.Actual efficiencies for a given drive type (depending on voltage, current rating, rectifier type ) may be slightly higher or lower than above numbers. You should contact the factory when guaranteed efficiencies are required.PowerFlex 7000 'A' FrameThe Allen-Bradley PowerFlex 7000 'A' Frame drive offers a compact package of power, control and operator interface designed to meet customer demands for increased reliability, improved ease of use and lower total cost of ownership.The PowerFlex 7000 'A' Frame complements the PowerFlex 7000 MV Drive product line by offering many of the same features and benefits in a much smaller foot print.

This slide illustrates an overall view of the PF7000 A Frame with doors open and cutaways for key components. The modular approach gives the drive an extremely clean and well-organized look that is unique among medium voltage drive layouts. Rectifier and inverter modules are located in the middle cabinet. The top 3 power cages are the inverter, and the bottom 3 represent the rectifier (AFE rectifier shown). The low voltage control tub and cable connection module are located in the right hand cabinet. The right hand section contains the DC link inductor and cooling system. The drive shown is a 4160 volt, 1250 hp base drive with AFE rectifier and measures 2.0 meters (78.74) wide, 2.275 meters (89.56) high, and 1.0 meters (39.37) deep. The base drive (configuration #1) has the smallest dimensions and offers the most installation flexibility. Provision is made for connecting to an indoor or outdoor isolation transformer. Configuration #2 consists of the base drive with an integral isolation transformer. This is ideal for existing motors, when a transformer is usually required. The integral transformer with 3 cables in / out reduces installation costs and overall system footprint. Configuration #3 consists of the base drive with an integral line reactor and input starter. This is ideal for new motors applications and eliminating the isolation transformer to save space and reduce losses . The integral line reactor and starter only requires 3 cables in / out to reduce installation costs and overall system footprint.

PowerFlex 7000 'B' FrameThe PowerFlex 7000 'B' Frame is a general purpose, stand alone Medium Voltage drive that controls speed, torque, direction, starting and stopping of standard asynchronous or synchronous AC motors. It is a global product that adheres to the most common standards from NEC, IEC, NEMA, UL and CSA. It is available up to 20,000 hp at the worlds most common supply voltages from 2400-6600 Volts.This slide illustrates an overall view of the PF7000 with doors open and cutaways for key components. The modular approach gives the drive an extremely clean and well-organized look that is unique among medium voltage drive layouts. Rectifier and inverter modules are located in the middle cabinet. The top 3 power cages are the inverter, and the bottom 3 represent the rectifier (AFE rectifier shown). The low voltage control tub and cable connection module are located in the left hand cabinet. The right hand section contains the DC link inductor and cooling system. An optional redundant fan can be mounted on the roof of the drive.The drive shown is a 2400 volt, 1000 hp unit with AFE rectifier and measures 2.4 meters (94.5) wide, 2.275 meters (89.56) high, and 1.0 meters (39.37) deep. Poster pictures of 3300-4160 volt units are available on the electronic launch kit under trade shows.PowerFlex 7000 'C' FrameThe Allen-Bradley PowerFlex 7000L Liquid Cooled Drive extends the power range of the PowerFlex family of drives up to 34,000 hp (25.4MW) and meets customer demands for increased reliability, improved ease of use and lower total cost of ownership. The PowerFlex 7000L offers many of the same benefits as the air-cooled PowerFlex 7000 MV Drive. Author: Fred Jason (Product Manager, MV Drives) Date Created: November 24, 2005 Date of Current Revision: Jan. 3, 2007Audience: Internal and External File Locations: TBD

product overview - powerflex 7000 family of drives

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