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Variable Frequency Drive

Variable Frequency Drive

Variable Frequency Drive Control Panels.

Variable frequency drive control panels are supplied either in a Nema 4 painted steel enclosure or a Nema 4X stainless steel enclosure and are suitable for use on 480 Volt, 3 Phase, 60 Hertz service.

The enclosures are provided with an inlet air filter and exhaust fan which are covered by rain hoods to stop the ingress of falling rain and other liquids. 

A hinged window kit is provided to enclose all of the control devices to prevent unauthorized operation of the system; this kit can also be provided with a key lock.

The variable frequency drive control panels come standard with a main circuit breaker with an external operating handle, MTE series RL 5% line reactor for reducing harmonic currents and frequencies, F7 series Yaskawa variable frequency drive for control of the centrifuge and a electromechanical starter together with a 3 phase overload relay protection for control of the feed pump.

The power wiring from the variable frequency drive and electromechanical starter is wired to Nema 4/Nema 4X receptacles mounted in the side of the enclosure, mating plugs are also provided for cable connections to the respective motors.

The variable frequency drive control devices consist of a pilot light for power on indication, selector switch for local/remote operation, elapsed time meter for total system running time, ammeter for centrifuge running ampacities, potentiometer for external speed control of the centrifuge and a keypad for the variable frequency drive.

The variable frequency drive keypad will assist in the initial set up of the system by allowing auto tuning of the motor together with other settings that are pertinent to each installation.

Various options are available such as:
Nema 1 or Nema 12 enclosures.
230 Volt, 3 Phase, 60 Hertz systems.
380 / 415 Volt, 3 Phase, 50 Hertz systems.
Start – Stop push buttons for local control mounted in the control panel door).
Start – Stop push buttons for remote control mounted in Nema 4/4X or Nema 7 enclosures dependent on location.
Multiple variable frequency drive systems.

Other options are available, please contact Gulf Coast Centrifuge with any questions that you may have.


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