Gould frequency converter

In the manufacturing sector, these converters are used to operate electrical machinery at varying speeds to enhance performance and overall productivity. Additionally, with the increasing trend of offshore wind power generation, the demand for the product has significantly grown. Moreover, product innovations such as the integration of advanced output filters that dampen the common mode currents and simultaneously change the phase-to-phase voltage into a sinusoidal signal are also contributing to the growth of the market.

IMARC Group provides an analysis of the key trends in each sub-segment of the global frequency converter market, along with forecasts at the global and regional level from Derate for altitudes above feet with a maximum operating altitude of meters feet. Consult your local Goulds Water Technology Dealer for additional assistance.

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If these procedures are followed, most problems can be eliminated and the frequency converter should deliver trouble-free service for many years. Modern frequency converters are amazingly reliable. With advances in semiconductor technology and increased buss capacitor performance, many of the problems that previously plagued frequency converter manufacturers are all but gone. All of the major frequency converter manufacturers build a relatively sturdy and reliable frequency converter.

Minimum internal failures ever occur. Problems outside of the frequency converter now contribute to a large number of frequency converter failures and are a major cause of nuisance tripping. So how does one look for the source of the problem? Think of your frequency converter system as a group of areas working in harmony. When the system has a problem, divide the system into pieces to determine where to start looking. The major areas are as follows: The input system Branch circuit protection Input contactor from the motor control center if used Wiring from the motor control center or branch circuit Input to the frequency converter disconnect switch or contactor Input bridge The frequency converter itself The motor Motor overload if used Motor wiring and conduit Motor disconnect if used Wiring to the motor The motor itself Problems with the input to the frequency converter can cause a number of failures.

A frequency converter can experience overvoltage or undervoltage trips due to line surges or sags. Or, a frequency converter may experience overcurrent trips or possibly a motor-related fault such as an overload. When dealing with these kinds of faults, a timeline can be very helpful. Document the time of day that the trips occur and then try to determine a pattern.

Perhaps the unit trips every day about AM. Perhaps the unit trips on undervoltage when the weather gets above deg F. If a pattern of these trips can be established, then a plan of attack can be developed. Remember that the frequency converter is reacting to outside problems by tripping off. Many other problems can cause the frequency converter input to react.

If you suspect a problem with the input power, it may be advantageous to have a power quality testing company install monitoring equipment and diagnose the line problems. Poor power quality will often cause needless frequency converter fault trips. Moving to the back of the frequency converter, we can examine some motor-related issues that are a source of many unresolved fault trips.

If problems are suspected with the motor or the attaching wire, it is best to apply a Megger to the motor system. Much confusion about this exists in the field. Try to start the process with the wires coming from the frequency converter.