CUSTOMIZED REACTORS
We design custom reactors for multiple applications in both medium and low voltage.
We design reactors tailored to your needs and projects that will allow you to protect your installations from the presence of harmonics, as well as from any possible resonances that may be caused by them. Similarly, the inverters themselves will be protected against voltage and current spikes, thus extending their useful life.
With the full range of reactors that Circutor has to offer, together with its design engineering, you can provide tailor-made filtering solutions for each application.
CUSTOMIZED REACTORS
We have spent decades designing and manufacturing: line reactors for filtering, reactors for PWM systems, reactors for smoothing, reactors for damping and reactors for static reactive energy compensation.
Over the years we have acquired great experience in designing and manufacturing reactors with: iron cores, air cores and split cores. They also feature various cooling systems: natural, forced air and liquid cooling.
We manufacture them in a wide range of sizes and powers, constantly taking into account the mechanical and transport needs of each customer and project.
We work closely with specialist companies in the wind energy sector to collaborate in the design and manufacture of tailor-made reactors based on the application. Our team of engineers offers their support in creating reactors to ensure the proper operation of your wind turbines. We have reactors for both the rotor and network sides.
dV/dt filters and reactors on the generator side
They protect the generator windings by limiting the voltage spikes caused by converter switching. They reduce the maintenance frequency of turbine bearings by lowering leakage currents.
Reactors for LCL and LC filters on the network side
They are used to filter the high-frequency ripple caused by the inverter’s PWM, smoothing the voltage wave at its output.
Diagram of reactors for the rotor and network sides
Reactors for inverters in solar applications
We manufacture a wide range of network-side filtering reactors designed to filter the high-frequency ripple caused by the inverter’s PWM, smoothing the voltage wave at its output.
Diagram of reactors for network-side LCL filters
• Tailor-made as per the customer's specifications.
• Optimized dimensional design.
• Windings with up to a 1,000 mm bandwidth.
• Customized design for the cooling system (pressure drops, flow...).
• Loss optimization: High-quality magnetic material.
• Parallelization of converters via reactance.
• Suppression of common-mode component.
Nowadays, both in industry and the tertiary sector, loads are used that generate harmonics, which overloads reactive compensation capacitors, increasing thermal losses and reducing their useful life. The use of reactors to reject harmonics will help to both protect capacitors and reduce the risk of resonances, thus improving the quality of the installation.
CIRCUTOR has a standard range of band-stop reactors p = 7%, with a resonance frequency of 189 Hz for 50-Hz networks (or, upon request, 227 Hz for 60-Hz networks). This is the most common tuning value to avoid any resonance with 5th and higher harmonics. The capacitor-reactor assembly absorbs part of the 5th harmonic current and acts as a band-stop filter for higher frequencies. Other p% values are required in some installations, such as 8.7% (170 Hz), 6% (204 Hz), 14% (134 Hz), etc.
STANDARD LOW-VOLTAGE REACTORS
RZ are three-phase reactors for band-stop filters and can be built on request, tailored to any power value, p%, voltage and frequency. Designed for use in low-power networks, they are built with a low-loss plate and wound with a copper conductor.
For higher powers, RBZ reactors with a magnetic plate core with multiple air gaps are used, which gives them excellent characteristics and very low losses. The windings have an aluminium band (or copper band, upon request) and the input and output connections are made using a busbar.
Speed regulation devices for motors, frequency converters, UPS, etc., generate network disturbances that affect other loads in the installation, or the operation of the speed regulation devices themselves. RZ/LRBZ reactors connected at the network-side input of these devices smooth out the voltage crests and reduce the harmonic distortion generated by the power electronics themselves. LRZ/LRBZ filter reactors allow the current harmonics of any converter to be reduced from 40- 50% to values of around 20%.
They also reduce the short-circuit current and make the semiconductors in the converter safer. If placed on the motor side, they can reduce harmonic frequencies due to switching.
STANDARD LOW-VOLTAGE REACTORS
LRZ are three-phase reactors made with a low-loss plate and wound with copper wire. They are made with a vacuum-impregnated varnish to increase insulation, enhance its mechanical consistency and reduce noise.
LRBZ reactors with a magnetic plate core with multiple air gaps are used for larger currents, which gives them excellent characteristics and very low losses. Copper band windings (or aluminium band, upon request). Connections are made using a busbar. They are made with a vacuum-impregnated varnish to increase insulation, enhance its mechanical consistency and reduce noise.
Vial Sant Jordi s/n – 08232
Viladecavalls, Barcelona (Spain)
+34 93 745 29 00
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+34 93 745 29 19
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