VFD Single Phase to Three Phase

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VFD Single Phase to Three PhaseA VFD (variable frequency drive) is an electric motor drive and although it will convert single phase to three phase it should never be used as a power source for control circuits, instrumentation circuits, or to operate other electronic components. The solution should be to isolate and feed the machine control circuit from a separate single phase source and feed the motor from the VFD output. Control circuits are almost always single phase even when the machine input is three phase. VFD’s that are rated for three phase input must be properly rated when single phase input is used.  Mains (input) current will be much higher when single phase power is applied to three phase rated equipment. Components within a three phase VFD of the same horsepower rating will most often not be rated for enough current and will fail. A mathematical calculation based upon the motor full load current will determine which VFD to use for the application. When applying single phase to a three phase rated drive, the horsepower of the drive will always be a higher rating than the motor horsepower rating.

Installation and Commissioning

A contactor or transition switch should never be used on the output of a VFD. Wiring from the VFD output terminals should go directly to the motor. A contactor may be used on the input but never on the output. Properly rated circuit breakers or fuses should always be used on the input of a VFD. Motor rated circuit breakers and fuses will allow too much current to pass for too long. Electronic components are less tolerant of short term over current conditions than motors. This information is found in the VFD User Manual. Installation of a VFD and other related equipment should only be performed by qualified personnel. VFD programming is typically easy for most applications. Programming for an application can usually be successfully performed once user manual has been read.

 

 

 

 

Electric Motor Drive Repair

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Electric Motor Drive RepairManufacturers in the United States rely on electric motor drive repair to minimize production downtime in their plants. Most original equipment manufacturers of electric motor drives convince users to replace failed drives rather than repair them, because original equipment manufacturers are in direct competition with companies who offer drive repair. Maintenance technicians work closely with drive repair shops because they are the backbone of minimizing cost for manufacturers.

Manufacturers usually seek electric motor drive repair facilities that offer 24/7 emergency repair services; because drives can fail at a moment’s notice and manufacturers cannot afford for their production line to shut down for extensive periods of time. Many drive repair shops outsource the repair to a different vendor and that increases the lead time and repair cost, so it’s important to ask your repair shop if they perform the repair work on site or if they outsource the work.

Who to Call for Repair Quotes

Electric Motor Drive RepairPrecision Electric offers 24/7 electric motor drive repair services. Precision Electric also offers free repair quotes for motor drives. Precision Electric repairs all drives in house to ensure prompt turnaround time and competitive repair pricing. Precision Electric uses the best components possible and Precision Electric uses the best testing equipment in all repair work performed. Drives repaired by Precision Electric ship back to customers in better condition than when the drive shipped new from the manufacturer.

Precision electric has offered industrial electronics repair since 1983, and have repaired thousands of electric motor drives. Precision Electric is also a distributor and integrator of the top drive manufacturers. Precision Electric drive repair procedures consists of pre-testing the equipment, testing of all components, replace damaged components, cleaning of all parts, final testing of all electrical components, assembly of equipment and safely returning the equipment to the customer. All repair work performed by Precision Electric includes a 12 month in-service warranty. The Precision Electric in-service warranty begins the day the drive is put into production and ends 12 months later.

Questions? Let Us Help. Call Precision Electric Toll Free at 1-877-625-2402 or E-Mail Sales and Support.

 

 

 

Eaton SVX9000 Drive

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Eaton’s SVX9000 adjustable frequency drives are the compact, modular solution to variable speed applications. They enable a broad range of new application capabilities. A complete selection of option cards allows you to configure the drive to meet any requirement. With its wide voltage range, high overload ability, and user-friendly alphanumerical keypad, SVX9000 drives are the smart decision for every user.

Just three screws link the control module to the power module. What’s more, control units are interchangeable within frame sizes while software, control panels, I/O and communication cards are common throughout the line. Separating the power and control units provides installation advantages and reduced spare parts requirements. For convenience, the SVX9000 is field convertible from Type 1 to Type 12 (frames 4–6). Its reduced size equates to less
panel space used and easy retrofits.

Even when the drive is unpowered, the SVX9000 can be programmed and tested. The control logic module can be
powered from an external +24 Vdc source so you’re ready to train, test and go live whenever needed. Whether you choose local or remote operations via the keypad, simple copy/paste functions streamline the process.

The SVX9000 may be configured with several different communication protocols, making it easy to communicate
with all commonly used control systems. The control unit’s powerful microprocessor can be used for local control tasks, thereby freeing resources of the control system for other control tasks. 9000XEngine, Eaton’s versatile block-programming tool, eliminates the need for a PLC and significantly simplifies the control system.

Programming Software


9000XLoad
9000XLoad is an easy-to-use tool for uploading system, application and option card software intended for use by
engineering, commissioning and service personnel. 9000XLoad is also suitable for loading custom applications to the SVX9000 drive.

9000XDrive
9000XDrive is a software tool that allows uploading and downloading drive parameters. Parameters can be changed, saved, and uploaded to any number of SVX9000 drives. The tool has the ability to print parameters or save them to a file for future use and reference. Parameters can be compared to default values to determine drive setup. Operator functions include the ability to set references, start and stop the drive, and to monitor signals and actual values. These values can be displayed via a graphic display.

9000XEngine
Create IEC 1131-3 compliant custom applications with 9000XEngine. This graphical design tool customizes the
control logic and parameters in the SVX9000. Functional Block Diagram (FBD), Ladder Diagram (LD) and Structured Text (ST) are all part of the function set. 9000XEngine enables the creation of parameters, fault messages and other applicationrelated features.

 

Information Source:

http://www.eaton.com/Eaton/ProductsServices/Electrical/ProductsandServices/AutomationandControl/AdjustableFrequencyDrives/IndustrialDrives/SVX/index.htm

 

 

 

Eaton SC9000 VFD

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With the Eaton SC9000 VFD double-bus, a second 1200 amp VFD bus is located above the main bus, adding only 8 inches of additional height to the system. The Ampgard SC 9000 doublebus enables close-coupling of an optional 24-inch-wide drive output contactor and multiple motor bypass and motor select contactors under a common bus alignment. Ampgard SC9000 integrated Control – Gear synchronous transfer control design gives Eaton’s customers the benefit of a compact and reliable system.

SC9000 Features

Eaton SC9000 VFDThe Eaton SC9000 VFD double-bus is integrated with a 24-inch-wide drive output contactor (optional) and 36-inch-wide motor bypass and motor select contactors structure that can be equipped with a 400 amp or 800 amp contactor, as required. A 400 amp motor bypass contactor and a 400 amp motor select contactor can be double-stacked in a single, 36-inch-wide cabinet for motor systems up to 3000 horsepower.

Eaton SC9000 VFD Ampgard double-bus design for synchronous transfer control was first to market. Do not be misled by “cable copy cats” 800 amp motor bypass and motor select contactor assemblies, which require two 36-inch-wide structures for a total width of 72 inches per motor.

Synchronous transfer systems help power generating facilities maximize the capital efficiency of their systems by controlling multiple motors with one adjustable frequency drive. Most manufacturers synchronous transfer control system have multiple drive output and motor select contactors that are interconnected typically via cables to allow the VFD to manage multiple motors.

With the Eaton SC9000 VFD Ampgard and the Ampgard Integrated Control – Gear VFD double-bus design, the drive output and motor select contactors are close-coupled under a common power bus (no cables) giving customers the compact design and superior performance they expect from the Eaton brand.

Eaton SC9000 VFDThe basic principle of synchronous transfer control is to adjust the Eaton SC9000 VFD output voltage, frequency and phase to match the utility. By matching these parameters, the drive system can transfer a motor from the SC9000 output to the utility in a “bump-less” manner. The Eaton SC9000 VFD and PLC systems are programmed to start or stop a single motor, as well as sync up or down to other motors as needed. Upon system startup, the SC 9000 and VFD bus are energized. The PLC closes the drive output contactor and the designated motor select contactor and starts the SC9000, allowing power to be directed to the desired motor (M1 above) for operation. The designated motor can now be operated at adjustable speed as needed. When an additional motor is required, the PLC will send the sync up command to the SC9000.

The Eaton SC9000 VFD adjusts its output to match the line voltage, frequency and phase angle. Once the drive output and line are synchronized, the system will transfer the motor from the drive output to the utility by opening the motor select contactor (M1) and closing the motor bypass contactor (B1). Once synchronization is locked, the adjacent motor select contactor (M2) is closed, and the Eaton SC9000 VFD can now operate the additional motor at variable speed as needed.

To learn more about the Eaton SC9000 VFD, visit the Eaton Website.

 

 

Information Source:

http://www.eaton.com/Eaton/ProductsServices/Electrical/ProductsandServices/ElectricalDistribution/MediumVoltageDrives/index.htm

 

 

 

 

Eaton CPX9000 Drives

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Eaton CPX9000 DrivesBased on over 15 years of 18-pulse drive experience and the highly successful 9000X Series of adjustable frequency drives, the Eaton CPX9000 drives use advanced clean power technology to significantly reduce line harmonics at the drive input terminals, resulting in one of the purest sinusoidal waveforms available. The Eaton CPX9000 drives deliver true power factor, so in addition to reducing harmonic distortion, it prevents overheating of upstream transformers and the overloading of breakers and feeders. It allows adjustable frequency drives to be applied to generators and other high impedance power systems. Designed to exceed the IEEE 519-1992 requirements for harmonic distortion, the Eaton CPX9000 drives are the clear choice for applications in the water/wastewater, HVAC, industrial and process industries where harmonics are a concern.

While utilities may deliver relatively clean power (pure sinusoidal waveforms), nonlinear loads such as computers,
drives, and electronic ballasts can introduce undesirable harmonic currents into the power system. Many facilities demand the IEEE 519-1992 standard for minimizing harmonic distortion be met to eliminate the potential for equipment failures that can lead to increased downtime and costs. The first step in developing an appropriate clean power solution is a facility analysis. Eaton performs facility simulations for existing facilities and during the design and construction phase of new facilities. In addition to offering the CPX9000 solution, Eaton’s Electrical Systems and Services organization is equipped to measure, analyze, and correct harmonic and other power quality issues. After the simulation is complete, a number of steps can be taken to ensure IEEE 519-1992 compliance. Major technologies include passive filters, active filters, additional inductive reactance, phase-shifted sources, 12-pulse rectifiers and the Eaton CPX9000 clean power drives. While all of technologies are viable, the Eaton CPX9000 is selected most often because unlike the other technologies, it meets IEEE 529-1992 at the drive input connection even if power system conditions change. This means no re-tuning, no adjustments and no new system analysis.

Harmonic Solutions

Harmonics are distorted electrical waveforms that introduce inefficiencies into your electrical system. They produce
wasteful heat and can cause plant issues and fees from your local power company. Harmonics flow into the
electrical system as a result of nonlinear electronic switching devices, such as adjustable frequency drives (AFDs),
computer power supplies and energy-efficient lighting. Similarly, companies with heavy motor, AFD and lighting
loads need to be aware of the problems that harmonics can cause. These problems include:

  • Increased electrical usage
  • Increased wear and tear on motors
  • Higher maintenance costs
  • Power quality problems upstream and downstream
  • Utility penalties for introducing problems to the power grid

Eaton CPX9000 DrivesThe Eaton CPX9000 drives‘ 18-pulse clean power will consistently meet IEEE-519 standards by reducing current distortion to 5% or less. The 18-pulse drive offers 50% better harmonic ratings (10% for 12-pulse vs. 5% for 18-pulse) at only a slightly higher cost. The efficiency of this new drive has helped to take harmonic reduction to a new level for manufacturing facilities across the globe. It meets IEEE standards in every case, attenuates all harmonics up to the 35th, stops harmonics at the source, is insensitive to future system changes, and increases the life of the drive through incredibly stable DC bus voltage (18 small inputs instead of six large ones). The 18-pulse converter is the most cost-effective solution at 50 hp or higher.

To learn more about Eaton CPX9000 drives or to download technical documents, visit the Eaton Website.

 

Information Source Page:

http://www.eaton.com/Eaton/ProductsServices/Electrical/ProductsandServices/AutomationandControl/AdjustableFrequencyDrives/LowHarmonicandCleanPowerSolutions/CPX/index.htm