Moxey Dairy

Located near Gooloogong on the western plains of NSW, Moxey Dairy is a major dairy farm with 5000 head of cattle. Part of the ongoing upgrades to the site is the automation of the environmental systems for the cattle, including the ventilation system, which is important for the comfort of the cattle. The contractor who won the project approached Fuseco for engineering and product solutions for the expected power quality issues, harmonics being the primary concern, placed back on the grid and the protection of the electric motors.

Moxey Dairy

Located near Gooloogong on the western plains of NSW, Moxey Dairy is a major dairy farm with 5000 head of cattle. Part of the ongoing upgrades to the site is the automation of the environmental systems for the cattle, including the ventilation system, which is important for the comfort of the cattle. The contractor who won the project approached Fuseco for engineering and product solutions for the expected power quality issues, harmonics being the primary concern, placed back on the grid and the protection of the electric motors.

THE PROBLEM

The contractor who won the project installed 26 variable speed drives to control the movement of air and approached Fuseco for engineering and product solutions for the expected power quality issues, harmonics being the primary concern, placed back on the grid and the protection of the electric motors.

  • The Active Harmonic Filters from Sinexcel were mounted on a wall, saving valuable space in the switch room. They also balanced the load and provided some reactive power for power factor correction purposes. Their user-friendly monitor is a popular feature with the customer because of the ease of use.
  • The MTE RL Line reactors provided a cost-effective solution for mitigating the harmonics & power line disturbances produced by the variable speed drives.
  • The Schaffner Sine Wave Filters were deployed on the output side of the VSD's and provided excellent motor protection as well as facilitating the application of long cable runs to the motors.

THE SOLUTION

Fuseco supplied 2 x 60A Sinexcel Active Harmonic Filters for the mitigation of harmonics that the variable speed drives were releasing back onto the supply and the electrical reticulation system of the site. Fuseco also supplied MTE Line Reactors for each variable speed drive for harmonic mitigation and to aid in the protection of the variable speed drives rectifier by reducing powerline disturbances. Line reactors aid the performance of the AHF by reducing the THDI and reducing the possibility of resonance. Fuseco supplied Schaffner Sine Wave Filters for motor protection due to the long distance between the variable speed drives and the motor, the Schaffner Sine Wave Filter reduces motor noise, vibration, heat, eddy and bearing currents and protects the motor from pulse pattern stress.

THE OUTCOME

The results were immediate and the performance of the solutions implemented were above and beyond the requirements of the IEEE-519 specification. The Sinexcel AHF provided a reduction of THDI to less than 5% and the THDV was reduced to less than 2% thus providing an impressive result and eliminating the risk of random MCCB and RCD tripping, interference to SCADA or BMS systems and complying to local harmonic limits.


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From the moment the AHF and SVG units were turned on our power factor issues were a thing of the past. At both sites our PF is now 0.99 on all phases all the time, the units react instantaneously to our fluctuating load and power factor and the result has been an excellent return on investment.

Brad Kilner

OPERATIONS MANAGER AT KILNER'S ENGINEERING

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