Line Reactor

THREE PHASE LINE REACTOR TYPE MLR/MLRC Open/close style 2 Amps - 110 Amps Line reactors, like the ones offered by Marcus Transformer, can maximize your efficiency and your energy savings while eliminating the most common problems. By utilizing a Marcus Line Reactor (MLR/MLRC), most of the line problems listed below should be eliminated:

  • Harmonic distortion in current and voltage

  • Nuisance tripping (such as overvoltage tripping of AC Pulse Width Modulated drives)

  • Line notching

  • Line noise

  • Surge current


In addition, our line reactors significantly enhance the performance and the life expectancy as well as the operating efficiency of the related solid-state devices, such as the motor and the drive itself.

  • Extending the life of switching components in power electronic circuits.

  • No more saturation due to the application of advanced grade laminations. Marcus Line Reactor will not saturate under the most severe line conditions, even in extreme overload at double current value.

  • Extending the life of the motor. Line reactors (applied in the output side of the drive) will improve the waveform, avoiding failures due to output circuit faults. As a result, motor-operating temperatures may be reduced by 100o to 200oC degrees.

  • Motor noise is reduced due to the removal of certain high frequency harmonic currents.

  • Better heat dissipation, which means less power losses, due to the particular attention that has been given in the design and testing procedures.

  • Minimize harmonic distortion. By applying a Marcus Line Reactor, the inrush current to the rectifier in the drive can be limited, and the peak current is reduced. Typically, current distortion is reduced by 30%. Furthermore, the voltage distortion (such as “flat-topping” voltage waveform) can also be minimized.

  • Better short circuit resistance.

  • Marcus Line reactors can withstand current under any kind of short circuit conditions.


Definition:

  • Z %= (VD X 100) X v 3 / VS

  • Z = Impedance

  • VD = Voltage drop across reactor at rated current to flow through it

  • VS = Voltage supply

  • Impedance rating and Selection of the Line Reactor: (3% or 5%)


Normally a 3 % impedance line reactor is sufficient for most solid-state applications in North America. Where there are high line disturbances in the circuits, a 5 % impedance reactor may be required. In most cases these units are used in the particular circumstance where there are strict limitations on harmonic distortion and noise level.

Please refer to Marcus type MDI Drive Isolation Transformers when considering further reduction of line problems.

PDF:
Open type line reactor
Closed type line reactor