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

Hurricane Harvey Impacts American Oil Refineries

Hurricane Harvey hit the heart of American Oil Refineries last week. So far (as of 8-31), Harvey has shut down 11.2 percent of American Oil Refineries capacity (about one-third of all American Oil Refineries capacity is in Texas Gulf Coast) and roughly 25 percent of American Oil Refineries’ production from the Gulf of Mexico (accounting for about 20 percent of American Oil Refineries crude production). Harvey also was the cause of closure to all ports along the Texas coast. Based on American Oil Refineries current operations, it is estimated that anywhere from 1 million to 2.2 million barrels per day of refining capacity are offline, as well as just under half a million BPD of production. The U.S. has been producing around 9.5 million barrels per day, and in general, American Oil Refineries production has beaten 2016 Energy Information Administration estimates for 2017 production. This production has played a major role in keeping global oil prices low, in turn hurting oil-dependent countries like Russia and Saudi Arabia.

Situated higher in the Hill Country, Austin has been spared the worst of what Harvey has wrought in cities like Rockport, Houston and Corpus Christi. But it is near enough to the coast that most of us who call it home know someone afflicted by this particular natural disaster. In a way, it has become personal to us. Communities and in the United States, states are absolutely communities are funny like that.

Typhoon Hato, which earned a signal 10 the highest possible rating in Hong Kongs classification system struck the region Aug. 23. The South China Morning Post described it as the worst typhoon that Macau has seen since 1968. Typhoon Pakhar, which earned a signal 8 rating, hit the region a few days later on Aug. 27.

Natural disasters like Harvey and Hato are unpredictable. (Advances in meteorological technology clue us in to general arrival times and broad behavior, sure, but even as late as this week no one could confidently say whether Harvey would turn east or west.) They come quickly and, compared to great plains and mountain chains, leave just as quickly. Put simply, there are things that cannot be accounted for ahead of time. Think about Japans bad luckat the Battle of Midway. Remember Gen. Robert E. Leesmiscalculation at Gettysburg. Recall Mount Tambora, whose eruption in 1815 would destroy crop harvests around the world, giving the world in 1816 what would be known as the Year Without a Summer. Hurricane Harvey, and the concurrent storms of southern China, are serious enough to consider whether they qualify.

There are always circumstances we will not be able to anticipate, and the only antidote for that is to be quick to recognize when those circumstances are upon us and to correct our course accordingly.

American Oil Refineries – A Challenge in Relief

Lets consider, then, the geopolitical importance of the storms that have stricken China and the United States, the largest economies in the world. Well start with China. The importance of these typhoons stems not from the tragic deaths and injuries resulting from the storm although they are indeed tragic. Their importance stems not from the economic fallout sure, itll be a costly reconstruction process, estimated by some to be roughly $1 billion, but China can afford it. Their importance stems not from trade none of Chinas most important trade infrastructure was harmed by Hato and Pakhar. Their importance does not even stem from location though the most affected areas, Hong Kong and Macau, are vital to Chinas economic interests, they serve mostly as a means to access capital markets. It is easier to rebuild a broken stock market than a broken port.

No, the geopolitical significance of these storms results from the political situation they created. In between landfall of the two typhoons, 1,000 Peoples Liberation Army troops left their garrison in Macau and took to the streets, at the behest of Macaus chief executive, to assist with clean-up operations. Though Macau is part of China, it boasts an autonomous government, so the deployment of troops is no small matter.

Of course, disaster relief is not the same as a military invasion, and the deployment can hardly be seen as an act of aggression. But it brings into relief one of Chinas most pressing political challenges: managing its special administrative regions. Over the past week in Hong Kong, one such region that is particularly suspicious of Beijings intentions, tens of thousands of protesters demonstrated against the arrest of democracy advocates. Though technically a separate issue from the situation in Macau, many protesters believe the troop deployment sets a precedent for losing more of their own autonomy. (Tellingly, Hong Kong reporters have been banned from entering Macau.) Its unclear whether their suspicions have any merit, but Beijing certainly wants to enhance its control over these territories, and the typhoons have given Beijing pretext to deploy troops.

American Oil Refineries – Severe, but Short-Term

Hurricane Harveys impact on American Oil Refineries production will be temporary, even if it is severe. In the short term, though, it could be globally significant. The storm has stalled out over Houston and promises to dump more and more rain over the area. If it damages the Colonial Pipeline which transports more than 40 percent of the Texas Gulf Coasts refined product, according to the EIA U.S. consumers would not only have to pay more at the pump, but U.S. policymakers would have to deal with Russia, which would greatly benefit from even a momentary spike in prices. It wont be clear what will happen to oil prices until we know what kind of damage coastal facilities have sustained, but the possibility of higher prices cant be ruled out.

Storms such as Harvey introduce unknown variables into our model. We cant predict them, but we can design our model to account for them when they happen. And why wouldnt we? Nation states tend to act differently when they stare down the ultimate geopolitical power: nature itself.

Precision Electric is now repairing and replacing all damaged equipment for American Oil Refineries in Texas. This is in hopes of getting American Oil Refineriesback on their feet in a timely manner. Many of the American Oil Refineriesuse Eaton VFD products on their rigs and Precision Electric is familiar and experienced in repairing Eaton equipment; Precision Electric has been working with American Oil Refineries in Texas for nearly ten years.Contact Precision Electric for repair and replacement quotes.

References: as well as portions of article are from anarticleby Jacob L. Shapiro of GPF