Power Quality Products

Harmonic Mitigation, Filters and Reactors

Explore our Power Quality Products

Five Star Electric (FSE) can provide power transformers and magnetics for service in the most extreme conditions and demanding applications found worldwide. Many solutions are simply single power transformers. However, in many applications, it is essential to coordinate the input transformer design with a VFD, Solid State Starter or other strategic equipment. Proper coordination of these components is critical to the operation, performance, safety and longevity of the entire installation. Our products comply with applicable industry and government standards practiced throughout the world.

Advanced Universal Harmonic Filters

The LINEATOR Advanced Universal Harmonic Filter (AUHF) is a revolutionary advancement in the area of passive harmonic mitigation. No other device on the market can meet the stringent limits of IEEE Std 519 at an equivalent
efficiency, size and cost. It provides Engineers with a standard off-the-shelf solution for what used to be a very challenging engineering problem.

LINEATOR-HP™ is designed to offer <5%, THD(I). This level of harmonic mitigation matches other technologies without the high frequency harmonics introduced by these more expensive and complex solutions. With the addition of a new reactor design that allows for onsite reactor impedance optimization, current distortion levels of <5% THD(I) are achieved without introducing excessive voltage drop or VSD instability.

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Extreme Duty Filters – Five Star Stocks these Filters
For extreme environments, such as excessive background voltage distortion (5% to 12% VTHD), high ambient (up to 55º C) or high elevation (above 3000 ft), Mirus now offers an extreme duty model for its Lineator AUHF. Our standard Lineator AUHF already outperforms any other competitive filter by guaranteeing performance when background voltage distortion is as high as 5%. In some applications however, such as marine vessels, drilling rigs and oil fields equipped with electrical submersiblepumps (ESP’s), existing voltage distortion levels will often exceed 5%. Also, when ambient temperature levels exceed 40º C or at higher elevations where the air is thinner, a more robust filter is required. The Lineator-ED model will meet this challenge.
Lineator-HP™ High Performance model used where the highest power quality demands must be met.

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4000HP, 690 Volt E-Rig
Mirus International 4000HP Harmonic E-Rig Filter which will be integrated on a Power skid with Switchgear and Transformer for a Permian application. We developed this design specifically for the high Background Source Voltage Distortion of these applications. This specific unit is designed for a hard bus close couple to the transformer and rough neck receptacles for connection to the rig. It is built to our Extreme Duty specification, which can handle 12% or greater BG Vthd ( consult us for your circuit condition), 55^C ambient, and 3% Source Voltage Imbalance. Available for AC or DC rig configurations. IEEE 519-2022 compliance modeling and performance testing is available.

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Advanced Universal Sine Wave Filters

The Pulse Width Modulated (PWM) output voltage waveform of inverter equipped systems can greatly stress a standard induction motor. This is primarily due to the rapid change in voltage (high dV/dT) produced by the inverter’s switching action. High dV/dT combined with a mismatch between cable and motor surge impedance can result in reflective wave phenomenon back at the motor terminals. Voltages can increase by as much as 2 to 3 times nominal peak levels possibly exceeding the insulation rating of the feeder cables and motor magnetic wire leading to insulation stress, partial discharges and eventual failure.

The Mirus Inversine Advanced Universal Sine-wave Filter (AUSF) is designed to address the problems resulting from pulse width modulation. It is a low pass filter with cutoff frequency well below the switching frequency of the inverter.

The AUSF is much more than a simple dV/dt filter and will:

  • substantially reduce voltage rise time (dV/dt)
  • convert output voltage to near sinusoidal waveform (<3%)
  • prevent transient over voltages at motor terminals
  • lower harmonic losses in the motor
  • reduce motor noise
  • reduce motor and cable insulation stress
  • extend life of the motor and ASD

INVERSINE Differential Mode

The Inversine Advanced Universal Sine-wave Filter (AUSF) is designed to address the problems resulting from pulse width modulation. It is a low pass filter with cutoff frequency well below the switching frequency of the inverter.

The AUSF is much more than a simple dV/dt filter and will:

  • substantially reduce voltage rise time (dV/dt)
  • convert output voltage to near sinusoidal waveform (<3%)
  • prevent transient overvoltages at motor terminals
  • lower harmonic losses in the motor
  • reduce motor noise
  • reduce motor and cable insulation stress
  • extend life of the motor and ASD

INVERSINE Common-mode Option

Common-mode is the phase-to-ground voltage that appears as a result of the instantaneous sum of the 3-phase voltages of the PWM inverter not being zero even when the sum of the average 3-phase voltages is zero. Common-mode voltages will induce common-mode currents to flow through parasitic capacitance in the motor and motor feeder cable. High frequency capacitive coupling exists across the motor bearings and between the feeder conductor or motor winding and ground. Common-mode currents can lead to premature motor bearing failure.

The Inversine Common-mode Filter option will:

  • Reduce shaft voltage and bearing currents
  • Reduce cable leakage currents
  • Reduce common-mode voltages throughout power system

Dynamic VAR Compensation

Advantages

  • Medium Voltage Metal-Enclosed Static VAR compensators are custom designed for power systems requiring instantaneous VAR support to mitigate voltage sags, and flicker.
  • This equipment stabilizes system voltage, improving equipment operation and in many cases operating efficiency and output.
  • The SVC controller samples phase voltage, load, and line currents at rates exceeding 7,000 times a second, analyzes them in real-time, and instantly adjusts VARs, effectively stiffening your power supply.
  • Metal-enclosed medium voltage capacitive filter banks designed to program and deliver the best in stand-alone SVCs, and combinations of SVCs with traditional switched power factor filter banks to quickly and cost-effectively address your specific issues.

Configurations

  • Operating Voltage: 2.4kV through 24.9kV
  • Impulse Withstand Voltage: 60kV BIL – 125kV BIL
  • Reactive power rating: 0.5 MVAR to 100 MVAR (binary step design, 1 to 15 steps).
  • Filter Type(s): Notch (Bank Pass), High-Pass, Multi-tuned.
  • Metal-Enclosed: NEMA 1, 3R, 4X, 12 | IEC IP10, IP14, IP56, IP52.
  • Comes fully assembled, tested, and ready for interconnection.
  • Integral air-disconnect /ground switch, fixed or draw-out circuit breaker.
  • Integral protection and control system.
  • Designed metal-enclosed banks are used by utilities and industry on three continents.