Three-Phase Detuned Reactors
In the design of power factor correction systems for industrial networks in the presence of high current harmonics, typically generated by non-linear loads such as rectifiers, welders, electronic drives, it is necessary to carefully evaluate the possibility of resonance phenomena. In the presence of a harmonic component whose frequency coincides with the natural frequency of the LC circuit consisting of inductive reactance and capacitance, a parallel resonance condition can occur. This condition can determine a considerable increase in the currents circulating in the capacitive branch, with consequent risk of overload, deterioration or destruction of the capacitors, in addition to the activation of protection devices. In order to avoid these potentially very harmful phenomena, it is advisable to place properly sized inductances in series with the capacitors. Our detuned reactors are available with different tuning frequencies, including the standard 189 Hz (p=7%), but we can also manufacture on request different tuning frequencies such as 134 Hz (p=14%) or 210 Hz (p=5.67%), according to the specific system requirements.
The correct sizing of these reactors allows to:
- Protect capacitors from premature aging due to harmonics
- Prevent dangerous resonance phenomena
- Reduce the risk of overheating of system components
- Improve the overall efficiency of the power factor correction system
| Technical characteristics | |
|---|---|
| Reference standards | IEC 61558-2-20, IEC 60076-6 |
| Standard tuning frequency | 189 Hz (p=7%) |
| Other available frequencies | 134 Hz (p=14%), 210 Hz (p=5.67%) |
| Thermal insulation class | F, H (depending on construction) |
| Reference ambient temperature | 40° C |
| Protection degree | IP00 |
| Suitable for installation up to | IP2x |
| Dielectric strength test | According to standards |
| Connections | Terminal block or output bars |
| Terminals | Non-flammable Nylon |
Braga three-phase detuned reactors are designed to guarantee maximum reliability even under severe operating conditions, with particular attention to thermal and magnetic sizing to ensure a long operational life.