How Will VFDs Alter Motor Efficiency (Pt. 2)

In the past article, we have established that VFDs are useful in applications where the load needs to be driven at various speed. Weve also seen the ease of how VFDs can be integrated into existing control system. But how do you maximize your investment on a VFD in the long run? This article offers useful hints.

Getting The Best Out Of Your VFD

It is pointless to drive a motor that is constantly running at 100% of its operating speed with a VFD. You will only get significant energy savings when the motor is operating at less than its maximum capacity. A VFD can reduce the speed of a pump or fan and opens a valve or damper with a lesser change in pressure.

A VFD does not suffer from hysteresis and outperforms valves and dampers in accuracy and repeatability. Besides that, it also minimizes wear on valves, dampers ducts, and pipes. The lifespan of rotators are increased as using a VFD creates less strain during start. Switchgear also does not suffer from unnecessary burden as the VFD draws minimal current when powered up.

With all considerations in place, it usually takes less than two years to have the savings in cost justifying the purchase of a VFD. A bigger motor usually means larger savings is achieved. Youll typically get great savings when integrating a VFD to a pump, although you need to ensure that the applications that are used do not require them to run at high speed.

Mixers and agitators can also benefit greatly from a VFD. Besides minimizing power consumption, a VFD provides better control in the mixing process. A conveyor system that needs its speed to be varied is also best fitted with a VFD.

Youll also want to take account of the use rate of the system itself. For example, a 50-hp motor that operates without stopping will consume more energy than a 100-HP that only runs for 8 hours on weekdays only. Assuming that both run at a reduced speed, the former one will benefit the most from a VFD.

Durability Of The VFD

As with any electronic product, the VFD is bound to fail eventually. Comparatively, VFDs have shorter shelf lives than soft starters. You may want to factor in the cost of removal, troubleshooting, and installation to reflect a better figure of the total savings in terms of money. If it fails after its warranty period, the repair cost shall be included as well.

The most common cause of VFD failures is the dc bus filtering electrolytic capacitors. This usually happens when the VFD is idling for a couple of years and it affects the electrolytes of the capacitor. To be safe in any situation, keep a VFD as a spare that hasnt be used for years, and get the capacitors replaced.

Its clear that installing a VFD on the right motor greatly increases its energy efficiency. With VFDs coming in different sizes and shapes, it is best to consult an experienced system integrator to know what best fits your application.

Have any questions? Contact us today and our staff will be ready to assist you!


How Will VFDs Alter Motor Efficiency

How Will VFDs Alter Motor Efficiency (Pt. 1)

When youre operating motor based equipment, energy efficiency has always been a concern, especially when calls for a greener environment are getting louder. If youve yet to explore the option of adding a Variable Frequency Drive (VFD), perhaps you should start doing so, especially after understanding the benefits of doing so.

Maximize Energy Saving With Variable Speed

As the name implies, a VFD is a device that controls the speed of an AC motor. A VFD is particularly useful in any application that requires the load to be operated at various speeds. With that said, any substantial energy-saving is only significant when youre not operating above 80% speed all the time.

A great example of a VFD application is the supply and exhaust fans of air handlers. Conventional methods use a damper operator to vary the air flow by opening and closing the damper operator. As the speed of the fan remains at full speed, this method is barely efficient. A VFD changes that by controlling the speed of the fan itself.

You can save a lot of energy with applications that see great variations in the motor speed. Applications that can benefit from VFDs are typically conveyors, mixers, fans, pumps, elevators and coordinated drives.

If youre running a motor at a fixed speed at all times, you may want to be cautious of not oversizing your motor. Aside from real power, a motor also draws reactive power to operate and this can affect the power factor, resulting in higher utility cost. The ideal design is to have the motor running near its rated load at the rated speed.

Integrating VFD With PLCs And Controllers

Getting a VFD integrated into a control system should not be a great concern these days. Newer PLCs and controllers feature Ethernet network that allows VFD to be connected directly. This allows the VFD to control the start/stop, forward/reverse and the set point of the motor. In case youre trying to integrate the VFD to an older motor drive where communication port is non-existence, you can easily hardwire the PLC output to the drives input to achieve the same functionality.

There are a couple of design concerns that you may want to pay attention to when it comes to VFDs. Youll want to be careful of regenerative energy that coupled back to the AC line created by overhauling load. Adding a dynamic braking resistor across the BRK+ and BRK- terminal will absorb the excess energy in a safe manner.

In applications that require your motor to run much at a much higher frequency than its specified rating, the motor will draw more current to stay at the correct speed. This happens because the available torque is dropping off while the horsepower remains constant. Extra precautions may be needed when determining your motor and drive in such situation.

We have more in-depth guides and tips in the second part of this article that you may not want to miss out on. Stay tuned and check it out before making your decision with a VFD.

Have any questions? Contact us today and our staff will be ready to assist you!


Nema Cabinet Ratings: Protecting a VFD from environmental conditions

Nema cabinet ratings are designed to protect electrical components from environment-specific threatening conditions. Nema cabinet ratings are made for a range of different environmental conditions. There are as many Nema cabinet ratings available as there are environmental conditions where equipment is installed.

VFD manufacturers will usually offer variable frequency drive (VFD) products in several different Nema cabinet ratings to cover a broad range of customer needs. Its important to choose the right Nema cabinet ratings for your VFD because:A.) you dont want your VFD to fail because then your operation is down / production is disrupted; and, B.) VFD warranty is often voided due to choosing the incorrect Nema cabinet ratings of VFD.

While there are a variety of Nema cabinet ratings available, the Type 1, 12, 3R, 3RX, 4, and 4X are specifically used in the Food and Beverage industry and HVAC industry. Of those Nema cabinet ratings, the Type 1, 12, and 3R options are used in over 95% of VFD installations. Type 3RX, 4, and 4X enclosures are available for unusually harsh and dusty environments. Whenever practically possible, mount the VFD in a stable environment, such as a mechanical room. Otherwise, make sure the Nema ratings for your VFD are susceptible to the environmental conditions of installation site.

UL Type 1 VFDs

  • Indoor locations only
  • Minimal dirt/dust in the air
  • No exposure to water spray or drips
  • Most common HVAC VFD enclosure

UL Type 12 VFDs

  • Indoor locations only
  • Dirty/dusty environment
  • Possibility to be splashed with water

UL Type 3R VFDs

  • Outdoor location
  • Minimal salt/corrosives in the air
  • Maximum ambient temperature 122F

UL Type 4 VFDs1

  • Indoor or outdoor locations2
  • Requirement to wash-down the VFD
  • Combination of dusty environment with
  • heavy moisture (fog)
  • Properly sized units may operate >122F

UL Type 4X VFDs1

  • Indoor or outdoor locations2
  • Requirement to wash-down the VFD
  • Significant salt/corrosives in the air
  • Properly sized units may operate >122F

UL Type 3RX VFDs

  • Identical to Type 3R except with stainless steel box
  • A degree of salt/corrosives in the air
  • enclosure appearance is important

When buying a VFD, make sure the VFD Nema cabinet ratings are susceptible to withstand the environmental conditions of installation site. If youre unsure which Nema cabinet best fits your application, contact Precision Electric with your application specifications; Precision Electric will provide you with a VFD quote that will meet your enclosure specifications. Call Precision Electricat 574-256-1000 for VFD repair, VFD replacement, or complex VFD project quotes.


Credit refs: most of the information in this articlewas originally published by ABB: LV drives division.

Some information was obtained from the ABB download center.Precision Electric is a certified ABB LV Drives

distributor and ABB Certified Startup Center. Certified Startup improves ABB Factory Warranties on LV Drives.

Additional information can be found at nema.org


Difference between Eaton SVX9000 and SPX9000 adjustable speed drives

The difference between Eaton SVX9000 and SPX9000? Many Eaton customers call or email asking “what is the difference between Eaton SVX9000 and SPX9000?” There is only a small difference between the two drives other than a letter and the price. The difference between Eaton SVX9000 and SPX9000 is that the SPX9000 is used for applications with speed feedback and the SVX9000 is used on general purpose applications that do not need speed feedback.

Eaton’s SVX9000 adjustable frequency drive has sensorless vector control technology coupled with an adaptive motor model and sophisticated ASIC circuit. Sensorless vector technology allows for steady speed error, fast torque rise time, high immunity to resonance vibrations and high starting torque and current. The SVX9000 is suitable for multiple motor drive systems and high-speed applications.

The SVX9000 Series Adjustable Frequency Drives are specifically engineered for todays commercial and industrial applications. These drives continue the tradition of robust performance, and raise the bar on features and functionality, ensuring the best solution at the right price. SVX9000Features include: Startup Wizard, seven built-in applications, local/remote button, modular design, text display, and the following:

  • Ease of use:Startup Wizard, seven built-in applications, local/remote button, modular design, text display
  • Space-saving design:Compact design, open NEMA12 option, onboard I/O expansion provisions
  • Efficiency:Built-in 3% line reactor, EMI/RFI filter standard
  • Rugged and reliable:High overload (CT) and low overload (VT) rated, robust time-proven design, durable metal power section, brake chopper circuit.

SPX9000: difference between Eaton SVX9000 and SPX9000

Eaton’s SPX9000 drives are designed specifically for high-performance applications. They feature high processing power and the ability to use information from an encoder or a resolver to provide precise motor control. In addition, a fast microprocessor provides high dynamic performance for applications where good motor handling and reliability are required.

  • Sensorless vector and simple frequency control are supported.
  • The drives can be used in both open loop applications and in applications that require encoder feedback.
  • The SPX9000 supports fast drive-to-drive communication and an integrated data logger functionality.
  • Simultaneous fast monitoring of several drives can be done using the 9000X drive tool and CAN communications.

The main difference from the two products is that the SPX9000 can run motors with speed feedback (i.e. encoder or tachometer). The SVX9000 does not have the ability to run a motor with speed feedback. So if the application requires speed feedback, SPX9000 is the solution. If no speed feedback is needed, the SVX9000 is the solution.

To learn more about Eaton drives, visit the Eaton Website. For Eaton Repair and Replacement quotes, contact Precision Electric.

Cutler Hammer SVX9000 - An inside look

Cutler Hammer SVX9000 – An Overview Of Eaton’s General Purpose Drive

Cutler Hammer 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, Cutler Hammer SVX9000 drives are the smart decision for every user.

Just three screws link the control module to the power module. Whats 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 Cutler Hammer SVX9000 is field convertible from Type 1 to Type 12 (frames 46). Its reduced size equates to less panel space used and easy retrofits.

Even when the drive is unpowered, the Cutler Hammer SVX9000 can be programmed and tested. The control logic module can be powered from an external +24 Vdc source so youre 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 Cutler Hammer SVX9000 may be configured with several different communication protocols, making it easy to communicate with all commonly used control systems. The control units powerful microprocessor can be used for local control tasks, thereby freeing resources of the control system for other control tasks. 9000XEngine, the versatile block-programming tool, eliminates the need for a PLC and significantly simplifies the control system.

The Cutler Hammer SVX9000 adjustable frequency drive offers sensor-less vector control technology coupled with an adaptive motor model and sophisticated ASIC circuit features. This technology allows for steady speed error, fast torque rise time, high immunity to resonance vibrations and high starting torque and current. The SVX9000 is suitable for multiple motor drive systems and high-speed applications.

Cutler Hammer SVX9000 is available in230V to 125 hp,480V to 250 hp,600V to 200 hp,Type 1/IP21Enclosedor Type 12/IP54 Enclosed. TheCutler Hammer SVX9000 offers the following communication options:

Modbus RTU/TCP

Cutler Hammer SVX9000 Software Tools

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 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 allows the user to 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 application related features.

The Cutler Hammer SVX9000 drive is sometimes mistaken for the Cutler Hammer SPX9000; the SPX9000 is a Cutler Hammer high performance drive and is available through 2000 HP.For Cutler Hammer SVX9000 user manuals and other product downloads, visit the Eaton Website. For Cutler Hammer SVX9000 drive repair and drive replacement quotes, contact Precision Electric. Precision Electric repairs all Cutler Hammer drive products through 2000 HP, in house.

VFD Overvoltage Fault - troubleshooting variable frequency drives

VFD Overvoltage Fault – troubleshooting variable frequency drives

A VFD overvoltage fault is fairly common with VFD regular usage. This fault may arise at different places and times for several reasons. The first step in resolving the problem is identifying when and where the fault occurs. A VFD overvoltage fault can occur on power up, during deceleration, acceleration, during normal run, or while sitting idle.

If the VFD overvoltage fault occurs during power up, the first thing to check is the incoming line voltage with a meter. If the line voltage is within specifications, find the jumper used to ground the common capacitors. This jumper will remove the common mode capacitors from ground. The VFD overvoltage fault may occur from ground noise coming back in through these capacitors causing a rise on the DC bus.

VFD overvoltage fault, at deceleration

The most common time a VFD overvoltage fault occurs is during deceleration. Sometimes the braking torque requirement exceeds drive braking circuit capacity. Other times the deceleration is too fast for its load and inertia from the load is going faster than the designated frequency. If you hit stop during a ramp down, the load spins faster than the designated frequency, the motor regenerates power back into the drive. The motor load then turns into a generator. This power is fed back into the drive, and stored on the DC bus. Extending the deceleration time is one way to solve a VFD overvoltage fault during deceleration.

If extending the deceleration time does not solve the VFD overvoltage fault, a dynamic brake may be required to dissipate the excess energy. A dynamic brake is a resistive device that takes energy from the bus and burns it off as heat. The only other solution is to reduce the inertia on the load to the motor. How you do that is dependent on your application. A constant overhauling load may be a good application for a regenerative drive, where instead of a dynamic brake removing energy by converting it to heat, a regenerative unit will put the energy back on the utility line, and may even decrease your energy bill.

A VFD Overvoltage fault during acceleration is uncommon, but it has been known to happen on high inertia loads with extensive acceleration times. A flywheel is a common high inertia application with timely acceleration. During acceleration, these type of loads can actually speed up quicker than the motor due to inertia, and the load becomes regenerative. To solve an overvoltage during acceleration, try to reduce the accel time. It usually takes some experimenting and fine tuning before a technician is satisfied with the results and commits to an accel time setting.

VFD overvoltage fault, operating normally

If the output load has a clutch, that may cause a VFD overvoltage fault. If there is a sudden drop in load, the motor speed may increase quickly, causing a regenerative load. If this is the case, a dynamic brake might help absorb the energy.A dynamic brake removes energy from the bus and burns it off as heat.With a high voltage line, and an application where a conveyor becomes less loaded, may be enough to turn the motor into a regenerative load. The drive is only able to absorb regenerative power to a certain extent, but too much will cause a VFD overvoltage fault.If the load is known to be stable, and not changing torque requirements drastically, then check the incoming line to the drive.

VFD overvoltage fault, when sitting idle

When high incoming AC voltage is present A VFD overvoltage fault can occur while the drive is sitting idle. If this VFD overvoltage fault is sporadic, theres something nearby that is causing the AC line to fluctuate. If you investigate large induction loads, see if they are causing the distribution line to change voltage.If an improperly tapped transformer is present, that can also cause an overvoltage fault by keeping the incoming line at the high end of the recommended voltage. This wont allow much room for voltage changes on the DC bus, if they were to occur. Incoming line fluctuations may not be detected by a multi-meter. If the voltage rise is quick and / or sharp, a multi-meter may not work fast enough to capture the reading. An oscilloscope or voltage monitor may be necessary to capture the voltage rise.
If the main incoming power line has power factor correction caps, switching in and out may also cause a large power spike. In this case, an isolation transformer or line reactor may be required on the front end of the drive to absorb the power spike.

Precision Electric offers drive repair and drive replacement for all manufacturer products. Precision Electric repairs AC and DC variable speed drives up to 3000 horsepower. Call Precision Electric for VFD repair and replacement quotes.






References: abb lv drives, ab rockwell


Cutler Hammer VFD Fault Codes: Current and Overcurrent Protection

Cutler Hammer VFD Fault Codes, current control and overcurrent protection on the 9000X drive is based on motor current measurement in all three phases. In the FR9/CH61 and above drives, the current sensors are built into the IGBT SKIP modules, and the current signals are combined and fed into a 14-bit A/D converter on the lower ASIC board. The ASIC board sends the current levels to the control board via a fiber optic serial link. In the smaller drives, FR8/CH5 and below, the measured current signal is fed directly to the control board. The SVX has a 10-bit A/D converter and the SPX has a 14-bit A/D converter.

The 9000X air-cooled frequency converter ratings are based on a High Overload (IH) capability. This means the drive can provide 150% rated output current for 1 minute if the drive was operating at rated output current (IH) for at least 9 minutes. To get continued 150% overcurrent capability, the average current over the duty cycle cannot exceed the rated output current. The maximum drive output current (IS) for starting produces approximately 200% rated motor torque but because the currents are vector sums, IS is less than 200% IH. The drive can deliver IS for 2 seconds every 20 seconds. The drive current limit can be set to 200% (2 x IH) to deliver IH but to reduce the chance of an overcurrent or IGBT over temperature trip, it is better to set the current limit to 150% (1.5 x IH) or less. The actual drive output current available to the motor is dependent on ambient temperature at the intake to the drive, restrictions in airflow to the drive, and the drive frame size. Drive frames FR4FR9 can deliver rated current (IH) at 50C. Drive frames FR10 and above can deliver rated current (IH) at 40C except for the highest ratings of a drive frame, which may be limited to 35C. The Low Overload (IL ) rating is typically used for variable torque loads where an overload is not necessary even though a 1 (out of 10) minute overload of 110% is allowed. All drive frames are limited to 40C or less for the IL rating. The rated currents of each frame depend on a reduction of switching frequency when unit temperature reaches the warning level.

LCX thermal current rating: The LCX liquid-cooled drive has a Thermal maximum continuous rms current (Ith). Use this value for continuous or any overload requirements of the process. The liquid-cooled drive does not have a 1-minute overload current rating. The thermal current rating is dependent on proper coolant flow to each module and a module coolant inlet temperature of 30C.

Current limit (software-function): The drive will attempt to limit drive output current to the current limit setting by overriding the Cutler Hammer VFD fault codes and lower the frequency reference until current is within the current limit setting. If unit temperature nears the warning level, the drive will reduce the output frequency in an attempt to bring drive output current down to a continuous current that is approximately the Low Overload (IL ) current rating. The control will not allow any further overcurrent conditions until the average current over the duty cycle is less than the drives current rating. The liquid-cooled drive control will attempt to limit the output current to the current limit setting up to the drives thermal rating, I th. The application should be designed to avoid using the current limiter for control. The safest way to operate the drive is to keep the drive output current within ratings with appropriate ramp times or a controlled reference to the drive.

Current cutter (hardware-function): If the drive software cannot prevent output current from exceeding 200% IH, a current cutter stops firing the IGBTs when the measured instantaneous value of the current exceeds 360% IH to reduce current quickly before overcurrent Cutler Hammer VFD fault codes trip the drive. They are re-fired on the next top of the triangle wave. The current cutter is active on select units FR8/CH5 and smaller.

Saturation fault (hardware-function): If the other current control and protection functions are not fast enough to prevent an extreme overcurrent condition, the IGBT saturates and the resulting voltage drop across the IGBT causes an F7, Saturation trip and all IGBTs are immediately switched off by the gate driver board. The brake chopper IGBT also has saturation protection and gives the same trip indication. Power to the drive must be cycled to reset this trip. This function is not yet available on drives FR10/CH61 and larger.

Visit the Eaton Website for information on additional Cutler Hammer VFD Fault Codes. Contact Precision Electric for Cutler Hammer VFD repair and replacement quotes.

De-Rating ABB Drives For Single Phase Input With ACS310 and ACS355 Series

De-Rating ABB Drives for single phase input is possible with the ABB ACS310and ACS355 Series drives. The ACS3XX-01U drives ratings are supplied in standard ratings for a single-phase supply voltage ranging from 200 to 240 V. They would then be used to operate a three-phase motor. It is also possible to supply 230 V single phase power to some three phase drive ratings but this would require a de-rating of the output current when choosing a drive. Table Showing Drive Rating and Available Output Current When Single Phase Input Power Is Applied:

De-Rating ABB Drives for single phase input should only be performed by electrical technicians. If you’re de-rating ABB drives for single phase input, contact someonewith experience before purchasing or installing equipment. To learn more about ABB drives, visit the ABB Website. To purchase ABB drives or for ABB drive repair, contact Precision Electric.

Lenze USA VFD Drives

Variable Frequency Drive Manufacturers: ABB, Eaton, Lenze, and Hitachi

Variable frequency drive manufacturers offer products to be used with electric motors.A variable frequency drive is also known as a VFD, variable speed drive, adjustable speed drive, electronic motor controller, or an inverter. Every VFD is unique with its own component characteristics; so, how each VFD works is dependent upon components within the VFD. Most VFDs integrate a solid state electronics controller, consisting of a bridge rectifier, a converter, and an inverter module. Properly applied variable frequency drives can significantly reduce production operating costs.

Variable Frequency Drive Manufacturers: ABB

ABB low voltage drives are used globally. ABB low voltage drives are designed specifically for the following industries: textile, material handling, mining, cement, rubber and plastics, food and beverage, consumer goods, automotive, oil and gas, pulp and paper, water filtration, and waste water treatment. ABB manufactures specific products for each of these industries to provide the best possible performance while keeping cost to an absolute minimum.

ABBmicro drivesinclude models ACS55 and ACS150. ABB micro drives are very easy to install and set up. ABB micro drives provide flexible mounting alternatives and straightforward configuration for many basic applications. Each drive is tested before it leaves the factory providing high machineavailability. ABB local customer and technical support is available no matter where ABB micro drives are delivered and installed. ABBmachinerydrives include models ACS55, ACS150 and ACS355. ABB machinery drives are designed to meet the production and performance needs of machine builders, system integration specialists, panel builders and end users. ABB machinery drives can be flexibly programmed to meet the demands of different machine solutions. A wide range of features and options provide optimal solutions.

ABB ACS880single drivesare complete drives and can be installed without any additional cabinet or enclosure. ABB single drive modules configuration contains a rectifier, optional EMC filter, reactor, DC link and an inverter in one single AC drive unit. ABB single drives are available as wall-mounted, free-standing and cabinet-built constructions. The key features of ABB single drivesare programmability and configurability during both ordering and commissioning, which makes adaptation to different applications easy. ABBs ACS880multi-drivesare mounted into a cabinet and the complete assembly isoffered and delivered as one package. Often, the multi-driveswill include additional accessories such as contactorsand earth fault protection units. ABBmulti-drives are built from ABB industrial drive modules connected to a common DC bus. This enables a singlepower entry and common braking resources for several drives.This construction simplifies the total installation, and results in many benefits, including: savings in cabling, reducedinstallation and maintenance costs, reduced line currents and more.ABB multi-drives are built-to-order products.ABB is one of several variable frequency drive manufacturers offered by Precision Electric.

Variable Frequency Drive Manufacturers: Eaton / Cutler Hammer

Eaton/Cutler Hammer drives are system drives designed for simple to complex applications. Eaton SVX9000 drives are used in Sullair air compressor applications throughout the United States. Eaton SVX9000 drives are also used globally in oil refineries, marine vessel, power distribution and alternative energy applications. Eaton’sSVX9000adjustable frequency drive offers sensorless vector control technology coupled with an adaptive motor model and sophisticated ASIC circuit features.. This technology allows for steady speed error, fast torque rise time, high immunity to resonance vibrations and high starting torque and current. TheSVX9000is suitable for multiple motor drive systems and high-speed applications.EatonSPX9000drives are designed specifically for high-performance applications. EatonSPX9000drives feature high processing power and the ability to use information from an encoder or a resolver to provide precise motor control. In addition, a fast microprocessor provides high dynamic performance for applications where good motor handling and reliability are required.Eaton is one of several variable frequency drive manufacturers offered by Precision Electric.

Variable Frequency Drive Manufacturers: Lenze Americas

Lenze Americas drives are mainly used for any application that does not require speed feedback. Lenze drives are built in America and are an inexpensive solution for food processing, packaging machinery, materials handling, conveying systems, and HVAC systems. The SMV series ofLenzedrives range from IP31 (NEMA 1) and IP65 (NEMA 4/NEMA 4X) in power ratings from 120V to 240V through 480V and600V. The SMV series of Lenzedrives offer sophisticated auto-tuning, fast dynamic toque response with impressive low-speed operation all from a compact and simple to use package. The SMV range is designed for motor applications where dynamic speed and torque control is demanded, making the units ideal for conveyors, food production lines, packaging equipment plus fan & pump systems.The SMV series of Lenze drives use a price leadership tradition in the highly competitive AC drive market. With the benefit of a two year warranty, the SMV series of Lenzedrives offerperformance and flexibility make it an attractive solution for a broad range of applications.

The SMV series ofLenzedrives use price leadership in delivering unparalleled performance and simplicity. The SMV series of Lenze drives is the right choice forperformance, power, packaging and intuitive programming. The Lenze SMV series of Lenze drives use anElectronic Programming Module (EPM) for programming. The Lenze EPM makes for ease of hassle-free reconfiguration within each parameter or resetting the drive to factory or user default settings. When drive reset is necessary, reset to factory default or customer settings in seconds with the EPM. When the EPM equipped drive is used on a line containing multiple drives with the identical setup, it takes just minutes to program the entire line. TheEPM’s can be replaced with or without power connected. When a drive must be replaced, the parameter configuration is not lost, simply plug in the pre-programmed EPM. Lenze is one of several variable frequency drive manufacturers offered by Precision Electric.

Variable Frequency Drive Manufacturers: Hitachi

Hitachi AC Variable frequency drives are utilized for an array of applications. Hitachi drives are equipped with several advanced features and deliver unprecedented performance and reliability. Hitachi drives are a result of high degree of commonality between models and user friendly configuration software making them easy to install, program and maintain. The SJ700DHitachi inverter is designed with more capabilities and functions of its predecessor, the Hitachi SJ700B Series. SJ700D inverters come with improved sensorless vector (SLV) control algorithm, which allows the SJ700D Series to develop 150% torque at 0.5 Hz, ideal for a wide range of applications. Another key upgrade in the SJ700D Series is the addition of Hitachi’s EzSQ (Easy Sequence) built-in programming function, which provides the functionality of a PLC built into the inverter.

SJ700D inverters offer built in programming functions. Sequence operations are used by downloading programs created with Hitachi’s EzSQ software and then transferred to the Hitachi inverters. Operation of SJ700D inverters can be tailored to meet changing process requirements and SJ700D inverters can replace separate PLC’s in some cases to simplify or eliminate external hardware, which reduces cost and increases performance. SJ700D Hitachi inverters through 150kW have a built-in EMC filter to reduce electromagnetic noise, cost and space.SJ700Dinverters have a lifetime warning function to allowpreventive maintenancebefore a failure occurs.

The Hitachi industrial WJ200 Series AC Variable FrequencyDrives range from 100-200V single phase input to three phase output, and 200-240V three phase input / output, and 390-480V three phase input / output. The WJ200 Variable Speed Drive comes with an integrated auto-tuning function for easy sensorless vector control that provideshigh starting torque of 200% or greater, suitable for a variety of applications. Hitachi is one of several variable frequency drive manufacturers offered by Precision Electric.

For variable frequency drive repair or replacement quotes, contact Precision Electric.

AC Tech Drive Repair

AC Tech Drive Repair

Should I Repair Or Replace My Drive?

Cost and Production Loss

AC Tech drive repair can be quicker and less expensive than drive replacement. AC Tech drive repair is most economical for: obsoletedrives, out of stock drives, and, drives above 10 horsepower. When a failed AC Tech drive is obsolete or the availability exceeds repair time, AC Tech drive repair can be a better solution than replacement.

AC Tech drives below 10 horsepower typically fail in eight years from their initial installation date.AC Tech drivesbelow 10 horsepower are more often replaced than repaired because the cost of repair will exceed the cost of replacement. AC Tech drives above 10 horsepower have a longer life span, and, are more often repaired than replaced, because the cost of repair is less expensive than the cost of replacement. Depending on the cause of failure, an AC Tech drive repair can cost anywhere from 40%-75% less than the replacement cost.

There are special circumstances that would allow a maintenance technician to choose AC Tech drive repair instead of replacement, regardless of the drive cost. For example: If a crucial production line is down due to AC Tech drive failure, a maintenance technician would look at their options: 1.) AC Tech drive replacement or 2.) AC Tech drive repair. If the AC Tech product needed is not in stock and the lead time is several weeks, the quicker solution would be AC Tech drive repair. The cost of the repair in these situations would first depend on the cost of downtime. If the downtime in production loss exceeds the drive repair time, the maintenance tech would go with the drive repair.

PM Programs

AC Tech drive repair PM programs for larger (above 10hp) AC Tech drives, can prevent severe damage to AC Tech drives. Severely damaged drive repair can cost more than drive replacement, depending on the extent of board and component damage. Preventative maintenance consists of cleanup or replacement of circuit boards and all other electrical components – Followed by 100% component test and final test run with motor; PM programs are typically scheduled out once or twice a year – onsite, when necessary.

AC Tech Drive Repair– Where Should I Send My Drive?

AC Tech drive repairis an asset to manufacturers, but choosing the right source is crucial. If the manufacturer chooses the wrong repair vendor, the mfg. could end up 1.) paying too much, 2.) waiting too long, or, 3.) paying a repair vendor thats outsourcing the repair to a third party, and marking up the cost. Precision Electric performs AC Tech drive repair every day for electrical repair shops who offer repair services. Precision Electric suggests to all manufacturers: make sure your repair vendor is performing the repair and not outsourcing the repair.

All AC Tech drive repair services are performed in house at Precision Electric. Precision Electric replaces bad components and failed parts with the best available components and parts in the electrical industry. All AC Tech drive repair performed by Precision Electric includes a one year in service warranty. The in service warranty ensures that all repaired equipment will receive an entire year of warranty – the warranty begins the day your equipment is put into service. The in service warranty is especially attractivefor spare drives.

AC Tech Drive Repair – Safety

AC Tech drive repair should be taken with extreme caution andonly be performed by trained technicians. Most AC Tech driveshave an internal DC bus that retains a charge after power has been cut to the drive. An untrained drive user can be injured if theyre unaware that power is still active on the drive. A technician working with variable frequency drives must follow certain steps and take extra precautions during a drive repair – This is to prevent injury or death during the repair.

For AC Tech repair quotes, contact Precision Electric. To learn more about AC Tech drive repair and replacement, contact Precision Electric.

Lenze USA VFD Drives

Lenze USA VFD Drives

Lenze USA is a manufacturer based out of Uxbridge, Massachusetts. Lenze USA is also known as Lenze Americas and AC Tech. Lenze USA manufactures high-performance VFD Drive products used to optimize new and existing machinery. Lenze USA is one of the leading drive and automation specialists in the field of machine engineering. Rapidly changing times present manufacturers with new and varied challenges. To succeed in the future, manufacturers will need to handle more extensive tasks in even shorter time frames; Lenze USA aims to reach this ideal.

SMV Series: The SMV series of Lenze USA VFD drives offer sophisticated auto-tuning and fast dynamic torque response. The SMV is designed for motor applications where dynamic speed and torque control is demanded. The SMV series is an attractive solution for a broad range of applications including: food processing machinery, packaging machinery, material handling, conveying systems, HVAC systems, and more. The SMV series uses an Electronic Programming Module (EPM) for programming. Maintenance techs can easily use the EPM to reconfigure drive parameters or reset the drive. When a drive reset is necessary on the SMV, customers can reset to factory default or preset settings within seconds. When SMV drives must be replaced, the parameter configuration can be saved by the user by simply plugging in the pre-programmed EPM.

MC1000 Series: The MC1000 Series of Lenze USA VFD drives are the intelligent, versatile and cost-effective choice for industrial applications. From harsh environments to high torque loads, the M1000 Series drives meet the toughest requirements with reliability, at a low cost. Customers can easily program the MC Series and integrate extensive I/O with an array of programmable functions. The M1000 is available in power ranges of 1/4 to 150 HP. The MC1000 offers Enhanced Torque System (ETS). ETS allows maximum starting and accelerating torque and tight speed regulation, even under fluctuating load conditions. M1000 drives feature manual boost for high starting torque, and auto-boost for high torque acceleration at any speed. The M1000 features power-up & auto restart modes, sleep mode with adjustable speed threshold and time. The MC1000 also offers an optional Form C Relay and Dynamic Braking.

M3000 Series:The M3000 series of Lenze USA VFD drives are for process control demands with fast acceleration and response. The M3000 is rated for constant torque applications but can easily be configured for variable torque applications. Most Process Control drives are designed for variable torque applications where the motor is driving a centrifugal fan or pump. As such, these drives are limited to 110% current for overload situations such as acceleration or responding to a feedback change. The MC3000 is a true Constant Torque drive rated for 180% of rated current for 30 seconds and 150% for one minute. This allows faster response to system changes and the ability to apply the MC3000 to non-centrifugal applications such as compressors, conveyors and other constant torque loads. The M3000 is available in the same power ranges and voltages as the M1000.

MCH Series: The MCH series of Lenze USA VFD drives are available from 1 to 250 HP. The MCH series were designed for the HVAC market and specific requirements of industrial and commercial installations. The MCH series are designed to operate standard induction motors. The MCH Series offers intuitive operator interface using simple programming and operational information. The MCH series allows drive software to adjust the motor speed to maintain a preset pressure, flow, temperature or other variables using PID setpoint control. The MCH Series include UL and cUL approved motor protection for single motor applications. The MCH Series is seen in applications such as fans, pumps and cooling towers.

To learn more about Lenze USA, visit the Lenze Website. For Lenze USA repair or replacement quotes, contact Precision Electric.

Compressor Speed Control Products – Repair Or Replace?

A compressor speed control is also known as a VFD, variable frequency drive, adjustable speed drive,or an inverter. To repair the compressor speed control, unique experience and training are needed. Repairing a compressor speed control should be taken with extreme caution. Alwaysconsult an expert in the field when repairing or troubleshooting industrial electrical equipment. Most compressor speed controls have an internal DC bus that retains a charge after power has been cut to the drive, and as a result, the power being cut doesn’t mean that the equipmentissafe to work with. Technicians working with a compressor speed control and other electrical equipmentmust always take extra precautions to ensure proper safety measures are taken to prevent injury or death.

Compressor Speed Control, Repair Or Replace?

Compressor speed control repair services are an assetfor Sullair service centers and other manufacturers. In most cases, the replacement of a speed control is more expensive and more time consuming than a repair. The extent of damage present in a compressor speed control will determine whether or not the equipment can be repaired. The speed control must be tested, disassembled, and inspected thoroughly by trained technicians to diagnose the cause of failure and determine repair cost.

Most companies who offer repair services for speed control products, outsource the repair to third party repair centers. Then, the service center offering this repair service, will mark up the cost for being the “middle man”. Precision Electric performs these repairs for third parties every day. Sometimes the speed control manufacturer also offers repair services but then once they have the speed control in their possession, they tell the customer that the speed control cannot be repaired and needs to be replaced. Precision Electric repairs compressor speed control products all the time after manufacturers have deemed the equipment “not worth repair” or“needs to be replaced”.

Eaton Cutler Hammer, for example, is a manufacturer of speed control products, that offers VFD repair services for their products. Sending the speed control to Eaton for repair isn’t the most economical solutionbecause Eaton has extensive lead times for repairs, and Eaton almost always ends up recommending replacing the entire speed control.Precision Electric offerscomplete Eatonspeed control repair and all repairs are performed in house, at Precision Electric.

Over the past decadeVFDtechnology has become a cost efficient way to reduce power costs and increase system efficiency. Manufacturers within a wide range of industries are finding more ways to apply VFD’s to their rotating equipment.From past experience, smaller horsepower VFD’s typically fail in eight years and are more often replaced rather than repaired.Larger horsepower VFD’s last longer by virtue of repairs that often require replacement of circuit boards and other electrical components.

To repair or replace your compressor speed control products, contact Precision Electric.