EMI-filters are used for suppressing line-conducted interferences. The spreading is prevented by a maximum level of impedance mismatch. The filtering effect extends in both directions. This means that both the interference from the consumer to the network and the interference from the network to the consumer are suppressed.
REO dv/dt filters suppress the voltage increase to tolerable levels due to their design. For short lengths of cable between the frequency inverter and the motor, a du/dt filter limits the increase speed and is the ideal link between frequency inverter and motor.
REO single-phase line filters achieve the highest possible damping thanks to powerful chokes.
The single-phase line filters are available as one-stage or two-stage filters and as a result enable compliance with the EMI guidelines in relation to the limit values for your application.
Three-phase line filters filter interferences in both directions – from the consumer to the network and from the network to the consumer. Typical applications are for example frequency inverters, wind turbines or power supplies
REO DC filter for protecting solar modules against premature aging. As a result of the ever more efficient energy conversion in modern power inverters, ever more high-frequency energy is being introduced into DC circuits. This energy is caused by the quick switching operations of modern power semi-conductors and could cause the premature aging of solar modules. REO-DC line filters work in both directions. In practical usage, this means that the end devices are protected against unnecessary high frequencies. On the other side however, the power network is also protected against the spreading of self-generated high frequencies by the end devices.
REO harmonic filters are used for the reduction of the THD (Total Harmonic Distortion). The harmonic currents will be so strongly suppressed that a THD of less than 5% is achieved (for example in uninterruptible power supply systems).
Furthermore, the reactive power is reduced by a harmonic filter (e.g. REOWAVEpassive) and up to 30% of energy is saved.
Sine wave filters shape output voltage for your frequency inverter
Advantages of the REO sine wavel filter:
– Output voltage is sinusoidal
– Also suitable for very long motor cables
– Shielded motor cables are not needed
– The efficiency level of the entire system will be increased
– Reduction of the motor noise and eddy-current losses
EMI filters are used for suppressing line-conducted interferences.
The spreading is prevented by a maximum level of impedance mismatch. The filtering effect extends in both directions. This means that both the interference from the consumer to the network and the interference from the network to the consumer are suppressed.
REO dv/dt filters suppress the voltage increase to tolerable levels due to their design. For short lengths of cable between the frequency inverter and the motor, a dv/dt filter limits the increase speed and is the ideal link between frequency inverter and motor.
The REO high-current filter has been specially designed for the interference suppression of high-current applications in wind power facilities and industrial applications.
There are filter series for the 480V and 690V voltage levels.
REO high-current filters can be delivered in a range of housing variants and hence they can be adapted to a variety of different environmental conditions.
With the filter combination from REO, a three-phase line reactor and an EMI filter are combined. This combination will minimize EMI problems and harmonics and will reduce energy costs by up to 20%.
The line reactor is responsible for removing stress from the supply network by compensating for the harmonic reactive power. In this way, the harmonics and the commutation notches in particular will be significantly reduced.
Are you looking for an individual solution? No problem! Our REO experts will be happy to answer any questions you may have.