For more detailed product information, please browse our Online-catalog. Our catalog also gives you the opportunity to request products.


It is known that disturbances in the supply network can be extremely costly. With the backdrop of energy market liberalization and the rising share of non-linear consumers in the grid, supply problems have increased in recent years.

Consumers such as automation systems or data processing systems are extremely sensitive to radio interference voltages or a deviation of the mains voltage from the sinusoidal profile.

The availability of such systems is increased with chokes and filters that are optimally adapted to the requirements of the system. mdexx chokes are used across industries to reduce harmonics and increase the availability of systems and devices.



Application examples for mdexx reactors

Whether in the electrical industry, mechanical engineering or in the process industry, on fans, conveyors or hoists – chokes and filters are just the thing in all industries and in all applications in which frequency inverters are used. They reduce mains harmonics as well as the effects of the converter feed on the motor. They protect and preserve the inverter and thus ensure the trouble-free operation of machines and plants.

Three-phase line reactors for frequency converters are used in line-side infeeds. They are connected such that alternating currents with line frequency flow through the reactors as the fundamental wave frequency. The reactor limits system perturbations that occur in the form of harmonics. Furthermore do they reduce the alternating current by means of the frequencies caused by the switching of the input rectifier in the DC link capacitors.

Two reactor series are available:

  • Reactors with a reference voltage drop uD of ~ 2 % for operation with converters without power recovery.
  • Reactors with a reference voltage drop uD of ~ 4 % for operation with converters combined with autotransformers with power recovery and for application in networks with a uK mains of < 1 %.